Table of Contents<\/h2><\/div>- Why Magnets Need Corrosion Protection<\/a>
- Common Magnet Coating Types and Their Functions<\/a>
- Nickel-Based Coatings (Ni-Cu-Ni)<\/a>
- Epoxy Coatings<\/a>
- Zinc Coatings<\/a>
- Parylene and Polymer Coatings<\/a><\/li><\/ul>
- Coating Selection by Magnet Material<\/a>
- Environmental Factors That Influence Coating Choice<\/a>
- Corrosion Testing and Quality Standards<\/a>
- Cost vs. Performance Trade-Offs<\/a>
- Conclusion<\/a><\/ul><\/div><\/div><\/div><\/div><\/div>\n\n\n
Why Magnets Need Corrosion Protection<\/h2>\n\n\n\n
Many magnet materials, particularly neodymium iron boron (NdFeB)<\/strong>, contain iron and rare earth elements that are highly susceptible to oxidation. When exposed to moisture, chemicals, or salt spray, unprotected magnets can:<\/p>\n\n\n\n\n- Corrode and lose structural integrity<\/li>\n\n\n\n
- Experience surface flaking or cracking<\/li>\n\n\n\n
- Suffer reduced magnetic performance over time<\/li>\n<\/ul>\n\n\n\n
In regulated or mission-critical environments, corrosion is not just a quality issue\u2014it is a risk management concern.<\/p>\n\n\n\n
\n\n\n\nCommon Magnet Coating Types and Their Functions<\/h2>\n\n\n\nNickel-Based Coatings (Ni-Cu-Ni)<\/h3>\n\n\n\n
Nickel plating is the most widely used coating for neodymium magnets.<\/p>\n\n\n\n
Key characteristics:<\/strong><\/p>\n\n\n\n\n- Good corrosion resistance in dry or mildly humid environments<\/li>\n\n\n\n
- Smooth, metallic finish suitable for precision assemblies<\/li>\n\n\n\n
- Cost-effective for high-volume production<\/li>\n<\/ul>\n\n\n\n
Ni-Cu-Ni coatings are commonly used in electronics, motors, and general industrial applications.<\/p>\n\n\n\n
\n\n\n\nEpoxy Coatings<\/h3>\n\n\n\n
Epoxy coatings provide enhanced protection in more aggressive environments.<\/p>\n\n\n\n
Key characteristics:<\/strong><\/p>\n\n\n\n\n- Excellent resistance to moisture, chemicals, and salt spray<\/li>\n\n\n\n
- Available in black or colored finishes<\/li>\n\n\n\n
- Slightly thicker coating layer compared to metal plating<\/li>\n<\/ul>\n\n\n\n
Epoxy-coated magnets are frequently used in outdoor, marine, and industrial environments where humidity is a persistent risk.<\/p>\n\n\n\n
\n\n\n\n![\"Magnet](\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Magnet-coating-layers-illustrating-corrosion-protection-structure-1024x559.webp\")
<\/figure>\n\n\n\nZinc Coatings<\/h3>\n\n\n\n
Zinc plating offers basic corrosion protection at a lower cost.<\/p>\n\n\n\n
Key characteristics:<\/strong><\/p>\n\n\n\n\n- Moderate corrosion resistance<\/li>\n\n\n\n
- Thinner coating layer<\/li>\n\n\n\n
- Suitable for indoor or low-risk environments<\/li>\n<\/ul>\n\n\n\n
Zinc coatings are typically selected for cost-sensitive applications with limited exposure to moisture.<\/p>\n\n\n\n
\n\n\n\nParylene and Polymer Coatings<\/h3>\n\n\n\n
For specialized applications, advanced polymer coatings may be required.<\/p>\n\n\n\n
Key characteristics:<\/strong><\/p>\n\n\n\n\n- Uniform, pinhole-free coverage<\/li>\n\n\n\n
- Excellent chemical and electrical insulation<\/li>\n\n\n\n
- Suitable for medical and electronic applications<\/li>\n<\/ul>\n\n\n\n
Although more expensive, these coatings support high-reliability use cases.<\/p>\n\n\n\n
\n\n\n\nCoating Selection by Magnet Material<\/h2>\n\n\n\n
Different magnet materials have different corrosion behaviors.<\/p>\n\n\n\n
\n- NdFeB magnets<\/a>:<\/strong> Require coating in almost all applications<\/li>\n\n\n\n
- SmCo magnets<\/a>:<\/strong> Naturally corrosion resistant; coating often optional<\/li>\n\n\n\n
- Ferrite magnets<\/a>:<\/strong> Excellent inherent corrosion resistance<\/li>\n\n\n\n
- Alnico magnets<\/a>:<\/strong> Good corrosion stability, usually uncoated<\/li>\n<\/ul>\n\n\n\n
Material selection and coating strategy should be evaluated together, not in isolation.<\/p>\n\n\n\n
\n\n\n\nEnvironmental Factors That Influence Coating Choice<\/h2>\n\n\n\n
When selecting a magnet coating, consider the full operating environment:<\/p>\n\n\n\n
\n- Humidity and water exposure<\/li>\n\n\n\n
- Temperature fluctuations<\/li>\n\n\n\n
- Chemical contact or salt spray<\/li>\n\n\n\n
- Mechanical wear and abrasion<\/li>\n<\/ul>\n\n\n\n
A mismatch between coating and environment is a common root cause of magnet failure in the field.<\/p>\n\n\n\n![\"Epoxy-coated](\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Epoxy-coated-magnets-designed-for-humid-and-corrosive-environments-1024x559.webp\")
<\/figure>\n\n\n\n
\n\n\n\nCorrosion Testing and Quality Standards<\/h2>\n\n\n\n
Professional magnet suppliers validate coating performance through standardized testing, such as:<\/p>\n\n\n\n
\n- Salt spray (fog) testing<\/li>\n\n\n\n
- Humidity aging tests<\/li>\n\n\n\n
- Adhesion and thickness inspection<\/li>\n<\/ul>\n\n\n\n
From a procurement standpoint, documented testing and quality control processes are essential indicators of supplier capability.<\/p>\n\n\n\n
\n\n\n\nCost vs. Performance Trade-Offs<\/h2>\n\n\n\n
Higher-grade coatings increase upfront cost but often reduce total lifecycle cost by:<\/p>\n\n\n\n
\n- Extending service life<\/li>\n\n\n\n
- Reducing maintenance and replacement<\/li>\n\n\n\n
- Preventing downstream equipment damage<\/li>\n<\/ul>\n\n\n\n
In B2B and OEM environments, coating decisions should be based on risk exposure rather than short-term cost optimization.<\/p>\n\n\n\n
\n\n\n\nConclusion<\/h2>\n\n\n\n
Magnet coatings are not a cosmetic feature\u2014they are a functional necessity that directly impacts durability, safety, and long-term performance. Selecting the right coating requires a clear understanding of magnet material, operating environment, and reliability expectations.<\/p>\n\n\n\n
By aligning coating strategy with real-world conditions, businesses can protect their magnetic components, stabilize product performance, and reduce avoidable operational risk.<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7523\u696d\u7528\u9014\u304a\u3088\u3073\u5546\u696d\u7528\u9014\u306b\u304a\u3044\u3066\u3001\u78c1\u77f3\u306e\u6027\u80fd\u306f\u78c1\u529b\u306e\u5f37\u3055\u3060\u3051\u3067\u6c7a\u307e\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u74b0\u5883\u8010\u4e45\u6027\u3001\u7279\u306b\u8010\u98df\u6027\u306f\u3001\u88fd\u54c1\u306e\u4fe1\u983c\u6027\u3001\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u30b3\u30b9\u30c8\u3001\u305d\u3057\u3066\u5b89\u5168\u6027\u3078\u306e\u9069\u5408\u6027\u306b\u304a\u3044\u3066\u6c7a\u5b9a\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u8868\u9762\u4fdd\u8b77\u304c\u65bd\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3001\u9ad8\u6027\u80fd\u78c1\u77f3\u3067\u3042\u3063\u3066\u3082\u6025\u901f\u306b\u52a3\u5316\u3057\u3001\u65e9\u671f\u6545\u969c\u3084\u904b\u7528\u30ea\u30b9\u30af\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u305d\u306e\u8010\u98df\u6027\u306b\u304a\u3051\u308b\u5f79\u5272\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u3001\u8abf\u9054\u30c1\u30fc\u30e0\u3001\u305d\u3057\u3066\u88fd\u54c1\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u306b\u3068\u3063\u3066\u4e0d\u53ef\u6b20\u3067\u3059\u3002.<\/p>","protected":false},"author":2,"featured_media":14581,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","footnotes":""},"categories":[82],"tags":[],"class_list":["post-14580","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide"],"acf":[],"yoast_head":"\n
Magnet Coatings and Corrosion Resistance: A Complete Selection Guide<\/title>\n<meta name=\"description\" content=\"Learn how magnet coatings improve corrosion resistance. Compare nickel, epoxy, zinc, and polymer coatings to choose the right protection for your application.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hsmagnet.com\/ja\/2026\/01\/16\/\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u8010\u98df\u6027\u306b\u3064\u3044\u3066\u77e5\u3063\u3066\u304a\u304f\u3079\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Magnet Coatings and Corrosion Resistance: A Complete Selection Guide\" \/>\n<meta property=\"og:description\" content=\"Learn how magnet coatings improve corrosion resistance. Compare nickel, epoxy, zinc, and polymer coatings to choose the right protection for your application.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/hsmagnet.com\/ja\/2026\/01\/16\/\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u8010\u98df\u6027\u306b\u3064\u3044\u3066\u77e5\u3063\u3066\u304a\u304f\u3079\/\" \/>\n<meta property=\"og:site_name\" content=\"Hangzhou HS Magnet Co.,Ltd.\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-16T02:44:19+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-16T02:44:21+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1408\" \/>\n\t<meta property=\"og:image:height\" content=\"768\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Seny Shen\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"Seny Shen\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"4\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/\"},\"author\":{\"name\":\"Seny Shen\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#\\\/schema\\\/person\\\/dd0a4e0932cb4b00363530f82ffa50a1\"},\"headline\":\"Magnet Coatings and Corrosion Resistance: What You Need to Know\",\"datePublished\":\"2026-01-16T02:44:19+00:00\",\"dateModified\":\"2026-01-16T02:44:21+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/\"},\"wordCount\":579,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp\",\"articleSection\":[\"Guide\"],\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/\",\"url\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/\",\"name\":\"Magnet Coatings and Corrosion Resistance: A Complete Selection Guide\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp\",\"datePublished\":\"2026-01-16T02:44:19+00:00\",\"dateModified\":\"2026-01-16T02:44:21+00:00\",\"description\":\"Learn how magnet coatings improve corrosion resistance. Compare nickel, epoxy, zinc, and polymer coatings to choose the right protection for your application.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#primaryimage\",\"url\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp\",\"contentUrl\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp\",\"width\":1408,\"height\":768,\"caption\":\"Neodymium magnets with nickel, epoxy, and zinc coatings for corrosion resistance.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/hsmagnet.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Magnet Coatings and Corrosion Resistance: What You Need to Know\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#website\",\"url\":\"https:\\\/\\\/hsmagnet.com\\\/\",\"name\":\"Hangzhou HS Magnet Co.,Ltd.\",\"description\":\"Leading manufacturer of premium permanent magnets for industrial applications in china\",\"publisher\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/hsmagnet.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ja\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#organization\",\"name\":\"Hangzhou HS Magnet Co.,Ltd.\",\"url\":\"https:\\\/\\\/hsmagnet.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/logo_pc.png\",\"contentUrl\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/logo_pc.png\",\"width\":237,\"height\":64,\"caption\":\"Hangzhou HS Magnet Co.,Ltd.\"},\"image\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#\\\/schema\\\/person\\\/dd0a4e0932cb4b00363530f82ffa50a1\",\"name\":\"Seny Shen\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/c733809a2b40bf201a236fce4b8ed2b6e2b48bae5b9c21f6c906b48c7678eb9f?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/c733809a2b40bf201a236fce4b8ed2b6e2b48bae5b9c21f6c906b48c7678eb9f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/c733809a2b40bf201a236fce4b8ed2b6e2b48bae5b9c21f6c906b48c7678eb9f?s=96&d=mm&r=g\",\"caption\":\"Seny Shen\"},\"url\":\"https:\\\/\\\/hsmagnet.com\\\/ja\\\/author\\\/szz-hsmagnet\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u8010\u98df\u6027\uff1a\u5b8c\u5168\u306a\u9078\u629e\u30ac\u30a4\u30c9","description":"\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u8010\u8150\u98df\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u4ed5\u7d44\u307f\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\u30cb\u30c3\u30b1\u30eb\u3001\u30a8\u30dd\u30ad\u30b7\u3001\u4e9c\u925b\u3001\u30dd\u30ea\u30de\u30fc\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u6bd4\u8f03\u3057\u3001\u7528\u9014\u306b\u6700\u9069\u306a\u4fdd\u8b77\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u304a\u9078\u3073\u304f\u3060\u3055\u3044\u3002.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/hsmagnet.com\/ja\/2026\/01\/16\/\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u8010\u98df\u6027\u306b\u3064\u3044\u3066\u77e5\u3063\u3066\u304a\u304f\u3079\/","og_locale":"ja_JP","og_type":"article","og_title":"Magnet Coatings and Corrosion Resistance: A Complete Selection Guide","og_description":"Learn how magnet coatings improve corrosion resistance. Compare nickel, epoxy, zinc, and polymer coatings to choose the right protection for your application.","og_url":"https:\/\/hsmagnet.com\/ja\/2026\/01\/16\/\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u8010\u98df\u6027\u306b\u3064\u3044\u3066\u77e5\u3063\u3066\u304a\u304f\u3079\/","og_site_name":"Hangzhou HS Magnet Co.,Ltd.","article_published_time":"2026-01-16T02:44:19+00:00","article_modified_time":"2026-01-16T02:44:21+00:00","og_image":[{"width":1408,"height":768,"url":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp","type":"image\/webp"}],"author":"Seny Shen","twitter_card":"summary_large_image","twitter_misc":{"\u57f7\u7b46\u8005":"Seny Shen","\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593":"4\u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#article","isPartOf":{"@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/"},"author":{"name":"Seny Shen","@id":"https:\/\/hsmagnet.com\/#\/schema\/person\/dd0a4e0932cb4b00363530f82ffa50a1"},"headline":"Magnet Coatings and Corrosion Resistance: What You Need to Know","datePublished":"2026-01-16T02:44:19+00:00","dateModified":"2026-01-16T02:44:21+00:00","mainEntityOfPage":{"@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/"},"wordCount":579,"commentCount":0,"publisher":{"@id":"https:\/\/hsmagnet.com\/#organization"},"image":{"@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#primaryimage"},"thumbnailUrl":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp","articleSection":["Guide"],"inLanguage":"ja","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/","url":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/","name":"\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u8010\u98df\u6027\uff1a\u5b8c\u5168\u306a\u9078\u629e\u30ac\u30a4\u30c9","isPartOf":{"@id":"https:\/\/hsmagnet.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#primaryimage"},"image":{"@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#primaryimage"},"thumbnailUrl":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp","datePublished":"2026-01-16T02:44:19+00:00","dateModified":"2026-01-16T02:44:21+00:00","description":"\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u8010\u8150\u98df\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u4ed5\u7d44\u307f\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\u30cb\u30c3\u30b1\u30eb\u3001\u30a8\u30dd\u30ad\u30b7\u3001\u4e9c\u925b\u3001\u30dd\u30ea\u30de\u30fc\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u6bd4\u8f03\u3057\u3001\u7528\u9014\u306b\u6700\u9069\u306a\u4fdd\u8b77\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u304a\u9078\u3073\u304f\u3060\u3055\u3044\u3002.","breadcrumb":{"@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#breadcrumb"},"inLanguage":"ja","potentialAction":[{"@type":"ReadAction","target":["https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/"]}]},{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#primaryimage","url":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp","contentUrl":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp","width":1408,"height":768,"caption":"Neodymium magnets with nickel, epoxy, and zinc coatings for corrosion resistance."},{"@type":"BreadcrumbList","@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/hsmagnet.com\/"},{"@type":"ListItem","position":2,"name":"Magnet Coatings and Corrosion Resistance: What You Need to Know"}]},{"@type":"WebSite","@id":"https:\/\/hsmagnet.com\/#website","url":"https:\/\/hsmagnet.com\/","name":"\u676d\u5ddeHS\u30de\u30b0\u30cd\u30c3\u30c8\u682a\u5f0f\u4f1a\u793e","description":"\u4e2d\u56fd\u306b\u304a\u3051\u308b\u7523\u696d\u7528\u9014\u5411\u3051\u9ad8\u54c1\u8cea\u6c38\u4e45\u78c1\u77f3\u306e\u5927\u624b\u30e1\u30fc\u30ab\u30fc","publisher":{"@id":"https:\/\/hsmagnet.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/hsmagnet.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ja"},{"@type":"Organization","@id":"https:\/\/hsmagnet.com\/#organization","name":"\u676d\u5ddeHS\u30de\u30b0\u30cd\u30c3\u30c8\u682a\u5f0f\u4f1a\u793e","url":"https:\/\/hsmagnet.com\/","logo":{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/hsmagnet.com\/#\/schema\/logo\/image\/","url":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/08\/logo_pc.png","contentUrl":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/08\/logo_pc.png","width":237,"height":64,"caption":"Hangzhou HS Magnet Co.,Ltd."},"image":{"@id":"https:\/\/hsmagnet.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/hsmagnet.com\/#\/schema\/person\/dd0a4e0932cb4b00363530f82ffa50a1","name":"\u30bb\u30cb\u30fc\u30fb\u30b7\u30a7\u30f3","image":{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/secure.gravatar.com\/avatar\/c733809a2b40bf201a236fce4b8ed2b6e2b48bae5b9c21f6c906b48c7678eb9f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c733809a2b40bf201a236fce4b8ed2b6e2b48bae5b9c21f6c906b48c7678eb9f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/c733809a2b40bf201a236fce4b8ed2b6e2b48bae5b9c21f6c906b48c7678eb9f?s=96&d=mm&r=g","caption":"Seny Shen"},"url":"https:\/\/hsmagnet.com\/ja\/author\/szz-hsmagnet\/"}]}},"_links":{"self":[{"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/posts\/14580","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/comments?post=14580"}],"version-history":[{"count":1,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/posts\/14580\/revisions"}],"predecessor-version":[{"id":14584,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/posts\/14580\/revisions\/14584"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/media\/14581"}],"wp:attachment":[{"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/media?parent=14580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/categories?post=14580"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/tags?post=14580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- Why Magnets Need Corrosion Protection<\/a>
- Common Magnet Coating Types and Their Functions<\/a>
- Nickel-Based Coatings (Ni-Cu-Ni)<\/a>
- Epoxy Coatings<\/a>
- Zinc Coatings<\/a>
- Parylene and Polymer Coatings<\/a><\/li><\/ul>
- Coating Selection by Magnet Material<\/a>
- Environmental Factors That Influence Coating Choice<\/a>
- Corrosion Testing and Quality Standards<\/a>
- Cost vs. Performance Trade-Offs<\/a>
- Conclusion<\/a><\/ul><\/div><\/div><\/div><\/div><\/div>\n\n\n
Why Magnets Need Corrosion Protection<\/h2>\n\n\n\n
Many magnet materials, particularly neodymium iron boron (NdFeB)<\/strong>, contain iron and rare earth elements that are highly susceptible to oxidation. When exposed to moisture, chemicals, or salt spray, unprotected magnets can:<\/p>\n\n\n\n
- \n
- Corrode and lose structural integrity<\/li>\n\n\n\n
- Experience surface flaking or cracking<\/li>\n\n\n\n
- Suffer reduced magnetic performance over time<\/li>\n<\/ul>\n\n\n\n
In regulated or mission-critical environments, corrosion is not just a quality issue\u2014it is a risk management concern.<\/p>\n\n\n\n
\n\n\n\nCommon Magnet Coating Types and Their Functions<\/h2>\n\n\n\n
Nickel-Based Coatings (Ni-Cu-Ni)<\/h3>\n\n\n\n
Nickel plating is the most widely used coating for neodymium magnets.<\/p>\n\n\n\n
Key characteristics:<\/strong><\/p>\n\n\n\n
- \n
- Good corrosion resistance in dry or mildly humid environments<\/li>\n\n\n\n
- Smooth, metallic finish suitable for precision assemblies<\/li>\n\n\n\n
- Cost-effective for high-volume production<\/li>\n<\/ul>\n\n\n\n
Ni-Cu-Ni coatings are commonly used in electronics, motors, and general industrial applications.<\/p>\n\n\n\n
\n\n\n\nEpoxy Coatings<\/h3>\n\n\n\n
Epoxy coatings provide enhanced protection in more aggressive environments.<\/p>\n\n\n\n
Key characteristics:<\/strong><\/p>\n\n\n\n
- \n
- Excellent resistance to moisture, chemicals, and salt spray<\/li>\n\n\n\n
- Available in black or colored finishes<\/li>\n\n\n\n
- Slightly thicker coating layer compared to metal plating<\/li>\n<\/ul>\n\n\n\n
Epoxy-coated magnets are frequently used in outdoor, marine, and industrial environments where humidity is a persistent risk.<\/p>\n\n\n\n
\n\n\n\n<\/figure>\n\n\n\nZinc Coatings<\/h3>\n\n\n\n
Zinc plating offers basic corrosion protection at a lower cost.<\/p>\n\n\n\n
Key characteristics:<\/strong><\/p>\n\n\n\n
- \n
- Moderate corrosion resistance<\/li>\n\n\n\n
- Thinner coating layer<\/li>\n\n\n\n
- Suitable for indoor or low-risk environments<\/li>\n<\/ul>\n\n\n\n
Zinc coatings are typically selected for cost-sensitive applications with limited exposure to moisture.<\/p>\n\n\n\n
\n\n\n\nParylene and Polymer Coatings<\/h3>\n\n\n\n
For specialized applications, advanced polymer coatings may be required.<\/p>\n\n\n\n
Key characteristics:<\/strong><\/p>\n\n\n\n
- \n
- Uniform, pinhole-free coverage<\/li>\n\n\n\n
- Excellent chemical and electrical insulation<\/li>\n\n\n\n
- Suitable for medical and electronic applications<\/li>\n<\/ul>\n\n\n\n
Although more expensive, these coatings support high-reliability use cases.<\/p>\n\n\n\n
\n\n\n\nCoating Selection by Magnet Material<\/h2>\n\n\n\n
Different magnet materials have different corrosion behaviors.<\/p>\n\n\n\n
- \n
- NdFeB magnets<\/a>:<\/strong> Require coating in almost all applications<\/li>\n\n\n\n
- SmCo magnets<\/a>:<\/strong> Naturally corrosion resistant; coating often optional<\/li>\n\n\n\n
- Ferrite magnets<\/a>:<\/strong> Excellent inherent corrosion resistance<\/li>\n\n\n\n
- Alnico magnets<\/a>:<\/strong> Good corrosion stability, usually uncoated<\/li>\n<\/ul>\n\n\n\n
Material selection and coating strategy should be evaluated together, not in isolation.<\/p>\n\n\n\n
\n\n\n\nEnvironmental Factors That Influence Coating Choice<\/h2>\n\n\n\n
When selecting a magnet coating, consider the full operating environment:<\/p>\n\n\n\n
- \n
- Humidity and water exposure<\/li>\n\n\n\n
- Temperature fluctuations<\/li>\n\n\n\n
- Chemical contact or salt spray<\/li>\n\n\n\n
- Mechanical wear and abrasion<\/li>\n<\/ul>\n\n\n\n
A mismatch between coating and environment is a common root cause of magnet failure in the field.<\/p>\n\n\n\n
<\/figure>\n\n\n\n
\n\n\n\nCorrosion Testing and Quality Standards<\/h2>\n\n\n\n
Professional magnet suppliers validate coating performance through standardized testing, such as:<\/p>\n\n\n\n
- \n
- Salt spray (fog) testing<\/li>\n\n\n\n
- Humidity aging tests<\/li>\n\n\n\n
- Adhesion and thickness inspection<\/li>\n<\/ul>\n\n\n\n
From a procurement standpoint, documented testing and quality control processes are essential indicators of supplier capability.<\/p>\n\n\n\n
\n\n\n\nCost vs. Performance Trade-Offs<\/h2>\n\n\n\n
Higher-grade coatings increase upfront cost but often reduce total lifecycle cost by:<\/p>\n\n\n\n
- \n
- Extending service life<\/li>\n\n\n\n
- Reducing maintenance and replacement<\/li>\n\n\n\n
- Preventing downstream equipment damage<\/li>\n<\/ul>\n\n\n\n
In B2B and OEM environments, coating decisions should be based on risk exposure rather than short-term cost optimization.<\/p>\n\n\n\n
\n\n\n\nConclusion<\/h2>\n\n\n\n
Magnet coatings are not a cosmetic feature\u2014they are a functional necessity that directly impacts durability, safety, and long-term performance. Selecting the right coating requires a clear understanding of magnet material, operating environment, and reliability expectations.<\/p>\n\n\n\n
By aligning coating strategy with real-world conditions, businesses can protect their magnetic components, stabilize product performance, and reduce avoidable operational risk.<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7523\u696d\u7528\u9014\u304a\u3088\u3073\u5546\u696d\u7528\u9014\u306b\u304a\u3044\u3066\u3001\u78c1\u77f3\u306e\u6027\u80fd\u306f\u78c1\u529b\u306e\u5f37\u3055\u3060\u3051\u3067\u6c7a\u307e\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u74b0\u5883\u8010\u4e45\u6027\u3001\u7279\u306b\u8010\u98df\u6027\u306f\u3001\u88fd\u54c1\u306e\u4fe1\u983c\u6027\u3001\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u30b3\u30b9\u30c8\u3001\u305d\u3057\u3066\u5b89\u5168\u6027\u3078\u306e\u9069\u5408\u6027\u306b\u304a\u3044\u3066\u6c7a\u5b9a\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u8868\u9762\u4fdd\u8b77\u304c\u65bd\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3001\u9ad8\u6027\u80fd\u78c1\u77f3\u3067\u3042\u3063\u3066\u3082\u6025\u901f\u306b\u52a3\u5316\u3057\u3001\u65e9\u671f\u6545\u969c\u3084\u904b\u7528\u30ea\u30b9\u30af\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u305d\u306e\u8010\u98df\u6027\u306b\u304a\u3051\u308b\u5f79\u5272\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u3001\u8abf\u9054\u30c1\u30fc\u30e0\u3001\u305d\u3057\u3066\u88fd\u54c1\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u306b\u3068\u3063\u3066\u4e0d\u53ef\u6b20\u3067\u3059\u3002.<\/p>","protected":false},"author":2,"featured_media":14581,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","footnotes":""},"categories":[82],"tags":[],"class_list":["post-14580","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide"],"acf":[],"yoast_head":"\n
Magnet Coatings and Corrosion Resistance: A Complete Selection Guide<\/title>\n<meta name=\"description\" content=\"Learn how magnet coatings improve corrosion resistance. Compare nickel, epoxy, zinc, and polymer coatings to choose the right protection for your application.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hsmagnet.com\/ja\/2026\/01\/16\/\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u8010\u98df\u6027\u306b\u3064\u3044\u3066\u77e5\u3063\u3066\u304a\u304f\u3079\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Magnet Coatings and Corrosion Resistance: A Complete Selection Guide\" \/>\n<meta property=\"og:description\" content=\"Learn how magnet coatings improve corrosion resistance. Compare nickel, epoxy, zinc, and polymer coatings to choose the right protection for your application.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/hsmagnet.com\/ja\/2026\/01\/16\/\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u8010\u98df\u6027\u306b\u3064\u3044\u3066\u77e5\u3063\u3066\u304a\u304f\u3079\/\" \/>\n<meta property=\"og:site_name\" content=\"Hangzhou HS Magnet Co.,Ltd.\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-16T02:44:19+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-16T02:44:21+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1408\" \/>\n\t<meta property=\"og:image:height\" content=\"768\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Seny Shen\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"Seny Shen\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"4\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/\"},\"author\":{\"name\":\"Seny Shen\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#\\\/schema\\\/person\\\/dd0a4e0932cb4b00363530f82ffa50a1\"},\"headline\":\"Magnet Coatings and Corrosion Resistance: What You Need to Know\",\"datePublished\":\"2026-01-16T02:44:19+00:00\",\"dateModified\":\"2026-01-16T02:44:21+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/\"},\"wordCount\":579,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp\",\"articleSection\":[\"Guide\"],\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/\",\"url\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/\",\"name\":\"Magnet Coatings and Corrosion Resistance: A Complete Selection Guide\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp\",\"datePublished\":\"2026-01-16T02:44:19+00:00\",\"dateModified\":\"2026-01-16T02:44:21+00:00\",\"description\":\"Learn how magnet coatings improve corrosion resistance. Compare nickel, epoxy, zinc, and polymer coatings to choose the right protection for your application.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#primaryimage\",\"url\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp\",\"contentUrl\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp\",\"width\":1408,\"height\":768,\"caption\":\"Neodymium magnets with nickel, epoxy, and zinc coatings for corrosion resistance.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2026\\\/01\\\/16\\\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/hsmagnet.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Magnet Coatings and Corrosion Resistance: What You Need to Know\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#website\",\"url\":\"https:\\\/\\\/hsmagnet.com\\\/\",\"name\":\"Hangzhou HS Magnet Co.,Ltd.\",\"description\":\"Leading manufacturer of premium permanent magnets for industrial applications in china\",\"publisher\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/hsmagnet.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ja\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#organization\",\"name\":\"Hangzhou HS Magnet Co.,Ltd.\",\"url\":\"https:\\\/\\\/hsmagnet.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/logo_pc.png\",\"contentUrl\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/logo_pc.png\",\"width\":237,\"height\":64,\"caption\":\"Hangzhou HS Magnet Co.,Ltd.\"},\"image\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#\\\/schema\\\/person\\\/dd0a4e0932cb4b00363530f82ffa50a1\",\"name\":\"Seny Shen\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/c733809a2b40bf201a236fce4b8ed2b6e2b48bae5b9c21f6c906b48c7678eb9f?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/c733809a2b40bf201a236fce4b8ed2b6e2b48bae5b9c21f6c906b48c7678eb9f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/c733809a2b40bf201a236fce4b8ed2b6e2b48bae5b9c21f6c906b48c7678eb9f?s=96&d=mm&r=g\",\"caption\":\"Seny Shen\"},\"url\":\"https:\\\/\\\/hsmagnet.com\\\/ja\\\/author\\\/szz-hsmagnet\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u8010\u98df\u6027\uff1a\u5b8c\u5168\u306a\u9078\u629e\u30ac\u30a4\u30c9","description":"\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u8010\u8150\u98df\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u4ed5\u7d44\u307f\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\u30cb\u30c3\u30b1\u30eb\u3001\u30a8\u30dd\u30ad\u30b7\u3001\u4e9c\u925b\u3001\u30dd\u30ea\u30de\u30fc\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u6bd4\u8f03\u3057\u3001\u7528\u9014\u306b\u6700\u9069\u306a\u4fdd\u8b77\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u304a\u9078\u3073\u304f\u3060\u3055\u3044\u3002.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/hsmagnet.com\/ja\/2026\/01\/16\/\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u8010\u98df\u6027\u306b\u3064\u3044\u3066\u77e5\u3063\u3066\u304a\u304f\u3079\/","og_locale":"ja_JP","og_type":"article","og_title":"Magnet Coatings and Corrosion Resistance: A Complete Selection Guide","og_description":"Learn how magnet coatings improve corrosion resistance. Compare nickel, epoxy, zinc, and polymer coatings to choose the right protection for your application.","og_url":"https:\/\/hsmagnet.com\/ja\/2026\/01\/16\/\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u8010\u98df\u6027\u306b\u3064\u3044\u3066\u77e5\u3063\u3066\u304a\u304f\u3079\/","og_site_name":"Hangzhou HS Magnet Co.,Ltd.","article_published_time":"2026-01-16T02:44:19+00:00","article_modified_time":"2026-01-16T02:44:21+00:00","og_image":[{"width":1408,"height":768,"url":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp","type":"image\/webp"}],"author":"Seny Shen","twitter_card":"summary_large_image","twitter_misc":{"\u57f7\u7b46\u8005":"Seny Shen","\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593":"4\u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#article","isPartOf":{"@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/"},"author":{"name":"Seny Shen","@id":"https:\/\/hsmagnet.com\/#\/schema\/person\/dd0a4e0932cb4b00363530f82ffa50a1"},"headline":"Magnet Coatings and Corrosion Resistance: What You Need to Know","datePublished":"2026-01-16T02:44:19+00:00","dateModified":"2026-01-16T02:44:21+00:00","mainEntityOfPage":{"@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/"},"wordCount":579,"commentCount":0,"publisher":{"@id":"https:\/\/hsmagnet.com\/#organization"},"image":{"@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#primaryimage"},"thumbnailUrl":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp","articleSection":["Guide"],"inLanguage":"ja","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/","url":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/","name":"\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u8010\u98df\u6027\uff1a\u5b8c\u5168\u306a\u9078\u629e\u30ac\u30a4\u30c9","isPartOf":{"@id":"https:\/\/hsmagnet.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#primaryimage"},"image":{"@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#primaryimage"},"thumbnailUrl":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp","datePublished":"2026-01-16T02:44:19+00:00","dateModified":"2026-01-16T02:44:21+00:00","description":"\u78c1\u77f3\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u8010\u8150\u98df\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u4ed5\u7d44\u307f\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\u30cb\u30c3\u30b1\u30eb\u3001\u30a8\u30dd\u30ad\u30b7\u3001\u4e9c\u925b\u3001\u30dd\u30ea\u30de\u30fc\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u6bd4\u8f03\u3057\u3001\u7528\u9014\u306b\u6700\u9069\u306a\u4fdd\u8b77\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u304a\u9078\u3073\u304f\u3060\u3055\u3044\u3002.","breadcrumb":{"@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#breadcrumb"},"inLanguage":"ja","potentialAction":[{"@type":"ReadAction","target":["https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/"]}]},{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#primaryimage","url":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp","contentUrl":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2026\/01\/Neodymium-magnets-with-nickel-epoxy-and-zinc-coatings-for-corrosion-resistance.webp","width":1408,"height":768,"caption":"Neodymium magnets with nickel, epoxy, and zinc coatings for corrosion resistance."},{"@type":"BreadcrumbList","@id":"https:\/\/hsmagnet.com\/2026\/01\/16\/magnet-coatings-and-corrosion-resistance-what-you-need-to-know\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/hsmagnet.com\/"},{"@type":"ListItem","position":2,"name":"Magnet Coatings and Corrosion Resistance: What You Need to Know"}]},{"@type":"WebSite","@id":"https:\/\/hsmagnet.com\/#website","url":"https:\/\/hsmagnet.com\/","name":"\u676d\u5ddeHS\u30de\u30b0\u30cd\u30c3\u30c8\u682a\u5f0f\u4f1a\u793e","description":"\u4e2d\u56fd\u306b\u304a\u3051\u308b\u7523\u696d\u7528\u9014\u5411\u3051\u9ad8\u54c1\u8cea\u6c38\u4e45\u78c1\u77f3\u306e\u5927\u624b\u30e1\u30fc\u30ab\u30fc","publisher":{"@id":"https:\/\/hsmagnet.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/hsmagnet.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ja"},{"@type":"Organization","@id":"https:\/\/hsmagnet.com\/#organization","name":"\u676d\u5ddeHS\u30de\u30b0\u30cd\u30c3\u30c8\u682a\u5f0f\u4f1a\u793e","url":"https:\/\/hsmagnet.com\/","logo":{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/hsmagnet.com\/#\/schema\/logo\/image\/","url":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/08\/logo_pc.png","contentUrl":"https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/08\/logo_pc.png","width":237,"height":64,"caption":"Hangzhou HS Magnet Co.,Ltd."},"image":{"@id":"https:\/\/hsmagnet.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/hsmagnet.com\/#\/schema\/person\/dd0a4e0932cb4b00363530f82ffa50a1","name":"\u30bb\u30cb\u30fc\u30fb\u30b7\u30a7\u30f3","image":{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/secure.gravatar.com\/avatar\/c733809a2b40bf201a236fce4b8ed2b6e2b48bae5b9c21f6c906b48c7678eb9f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c733809a2b40bf201a236fce4b8ed2b6e2b48bae5b9c21f6c906b48c7678eb9f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/c733809a2b40bf201a236fce4b8ed2b6e2b48bae5b9c21f6c906b48c7678eb9f?s=96&d=mm&r=g","caption":"Seny Shen"},"url":"https:\/\/hsmagnet.com\/ja\/author\/szz-hsmagnet\/"}]}},"_links":{"self":[{"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/posts\/14580","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/comments?post=14580"}],"version-history":[{"count":1,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/posts\/14580\/revisions"}],"predecessor-version":[{"id":14584,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/posts\/14580\/revisions\/14584"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/media\/14581"}],"wp:attachment":[{"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/media?parent=14580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/categories?post=14580"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hsmagnet.com\/ja\/wp-json\/wp\/v2\/tags?post=14580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- SmCo magnets<\/a>:<\/strong> Naturally corrosion resistant; coating often optional<\/li>\n\n\n\n
- NdFeB magnets<\/a>:<\/strong> Require coating in almost all applications<\/li>\n\n\n\n
- Epoxy Coatings<\/a>
- Common Magnet Coating Types and Their Functions<\/a>