{"id":21968,"date":"2026-06-18T16:30:33","date_gmt":"2026-06-18T08:30:33","guid":{"rendered":"https:\/\/nkmceramic.com\/?p=21968"},"modified":"2026-06-18T16:30:33","modified_gmt":"2026-06-18T08:30:33","slug":"chemical-properties-of-sic","status":"publish","type":"post","link":"https:\/\/nkmceramic.com\/ar\/chemical-properties-of-sic\/","title":{"rendered":"Chemical Properties of Silicon Carbide: A Practical Guide for Industrial Applications"},"content":{"rendered":"<p><a href=\"https:\/\/nkmceramic.com\/what-is-silicon-carbide-ceramic-materials\/\"><u>Silicon carbide (SiC)<\/u><\/a>\u00a0is a high-performance ceramic material. Its unique chemical properties make it superior to traditional metals and ordinary ceramics. Unlike common brittle ceramics, silicon carbide maintains stable chemical activity under high temperature, strong corrosion and high-pressure environments.<\/p>\n<p>This article shows the 6 main chemical properties of silicon carbide. It aims to explain how these properties benefit your industrial production.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nkmceramic.com\/ar\/chemical-properties-of-sic\/#Excellent_Chemical_Inertness_at_Room_Temperature\" >Excellent Chemical Inertness at Room Temperature<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nkmceramic.com\/ar\/chemical-properties-of-sic\/#High-Temperature_Oxidation_Resistance\" >High-Temperature Oxidation Resistance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nkmceramic.com\/ar\/chemical-properties-of-sic\/#Strong_Acid_Corrosion_Resistance\" >Strong Acid Corrosion Resistance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nkmceramic.com\/ar\/chemical-properties-of-sic\/#Weak_Alkali_Resistance\" >Weak Alkali Resistance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nkmceramic.com\/ar\/chemical-properties-of-sic\/#Stable_Chemical_Performance_in_Special_Gas_Environments\" >Stable Chemical Performance in Special Gas Environments<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nkmceramic.com\/ar\/chemical-properties-of-sic\/#Chemical_Compatibility_with_Industrial_Melts\" >Chemical Compatibility with Industrial Melts<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nkmceramic.com\/ar\/chemical-properties-of-sic\/#FAQs\" >FAQs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/nkmceramic.com\/ar\/chemical-properties-of-sic\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/nkmceramic.com\/ar\/chemical-properties-of-sic\/#Reference\" >Reference<\/a><\/li><\/ul><\/nav><\/div>\n\n<h2><span class=\"ez-toc-section\" id=\"Excellent_Chemical_Inertness_at_Room_Temperature\"><\/span><strong><b>Excellent Chemical Inertness at Room Temperature<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Silicon carbide is chemically inert at normal temperature and pressure. It has a stable molecular structure because of a <a href=\"https:\/\/nkmceramic.com\/structure-of-silicon-carbide\/\"><u>strong covalent bond<\/u><\/a>, which makes it not react with water, air and most neutral chemical media. As a result, silicon carbide will not undergo chemical corrosion or oxidation during long-term room-temperature storage, reducing your maintenance costs in daily production.<\/p>\n<p>In common industrial conditions, you can use SiC structural parts without any anti-corrosion coating. They can maintain excellent performance and a stable structure for years, and are a cost-effective choice for industrial basic components.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"High-Temperature_Oxidation_Resistance\"><\/span><strong><b>High-Temperature Oxidation Resistance<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Silicon carbide possesses high-temperature oxidation resistance. It is a valuable chemical property for high-temperature industries. Most metal materials oxidize and fail rapidly above 600\u2103, while SiC is still stable even at much higher temperatures.<\/p>\n<p>SiC starts slow oxidation only when the temperature exceeds 800\u2103 in air. A dense silicon dioxide (SiO<sub>2<\/sub>) protective film forms on its surface during oxidation. This thin film tightly covers the material surface. It blocks oxygen from contacting the internal SiC matrix.<\/p>\n<p>The protective layer becomes more stable between 1,000\u2103 and 1,400\u2103. It effectively inhibits further oxidation reactions. The oxidation rate slows down significantly and even tends to stagnate. When the temperature rises above 1,600\u2103, the SiO<sub>2<\/sub>\u00a0film gradually fails. The oxidation speed of SiC will increase accordingly.<\/p>\n<p>This graded oxidation resistance perfectly matches your high-temperature furnace and thermal processing equipment needs. You can safely apply SiC parts in continuous high-temperature working scenarios below 1,500\u2103. It delivers long-term stable anti-oxidation performance.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Strong_Acid_Corrosion_Resistance\"><\/span><strong><b>Strong Acid Corrosion Resistance<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Silicon carbide shows an outstanding tolerance to most acidic chemical media. It is barely corroded by dilute sulfuric acid, dilute hydrochloric acid and dilute nitric acid at room temperature. It also resists corrosion from most organic acidic solutions.<\/p>\n<p>Even concentrated strong acids have a limited impact on SiC under normal temperatures. No obvious chemical reaction or structural damage will happen. Only mixed solutions of concentrated hydrofluoric acid and concentrated nitric acid can slowly erode SiC materials.<\/p>\n<p>Such excellent acid resistance can solve the corrosion problems of your chemical processing equipment in acid pickling and acid reaction workshops. You can use SiC <a href=\"https:\/\/nkmceramic.com\/silicon-carbide-lining\/\"><u>liners<\/u><\/a>, <a href=\"https:\/\/nkmceramic.com\/silicon-carbide-tube\/\"><u>reaction tubes<\/u><\/a>\u00a0and filter components. Without rust or degradation like metal parts, these parts can ensure continuous and stable production.<\/p>\n<figure id=\"attachment_21969\" aria-describedby=\"caption-attachment-21969\" style=\"width: 1280px\" class=\"wp-caption alignnone\"><img decoding=\"async\" class=\"size-full wp-image-21969 lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/06\/1-Silicon-Carbide-Liners-Used-In-Chemical-Mining-Industries.jpg\" alt=\"Silicon Carbide Liners Used In Chemical &amp; Mining Industries\" width=\"1280\" height=\"720\" \/><figcaption id=\"caption-attachment-21969\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-full wp-image-21969 lazyload\" src=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/06\/1-Silicon-Carbide-Liners-Used-In-Chemical-Mining-Industries.jpg\" alt=\"Silicon Carbide Liners Used In Chemical &amp; Mining Industries\" width=\"1280\" height=\"720\" srcset=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/06\/1-Silicon-Carbide-Liners-Used-In-Chemical-Mining-Industries.jpg 1280w, https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/06\/1-Silicon-Carbide-Liners-Used-In-Chemical-Mining-Industries-768x432.jpg 768w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/noscript> Silicon Carbide Liners Used In Chemical &amp; Mining Industries<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Weak_Alkali_Resistance\"><\/span><strong><b>Weak Alkali Resistance<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>While SiC performs well in acid resistance, it has poor tolerance to alkaline media. SiC remains stable in dilute alkaline solutions at room temperature. It will not have obvious chemical changes. But when facing molten strong alkalis or high-concentration alkaline solutions at high temperature, it reacts violently.<\/p>\n<p>Long-term use in high-temperature alkaline environments will cause surface peeling and structural failure of SiC parts. If your production involves alkaline media, you can choose modified SiC composite materials. They enhance alkali resistance while retaining original high-temperature performance.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Stable_Chemical_Performance_in_Special_Gas_Environments\"><\/span><strong><b>Stable Chemical Performance in Special Gas Environments<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Silicon carbide does not react with nitrogen, carbon dioxide and dry inert gases at high temperatures. It provides good chemical stability in most industrial protective gas environments.<\/p>\n<p>It also shows excellent tolerance to high-temperature flue gas containing sulfur and carbon components. SiC will not be corroded by sulfide gas in industrial waste gas treatment. This makes SiC ideal for your high-temperature flue gas treatment and waste heat recovery equipment.<\/p>\n<p>You can use SiC <a href=\"https:\/\/nkmceramic.com\/silicon-carbide-heat-exchanger\/\"><u>heat exchangers<\/u><\/a>\u00a0and flue gas filter elements in long-term high-temperature flue gas environments. They resist chemical corrosion and thermal shock to extend equipment service life and reduce replacement frequency.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Chemical_Compatibility_with_Industrial_Melts\"><\/span><strong><b>Chemical Compatibility with Industrial Melts<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>SiC has poor compatibility with partially molten high-temperature materials. It will react with molten iron and molten alkali metals at ultra-high temperatures. This easily causes material erosion and failure.<\/p>\n<p>However, silicon carbide maintains stable chemical properties with most molten non-ferrous metals and high-temperature slag. It will not produce adhesion or chemical pollution, suits your high-temperature smelting and casting auxiliary equipment.<\/p>\n<p>You can use SiC <a href=\"https:\/\/nkmceramic.com\/silicon-carbide-crucible\/\"><u>crucibles<\/u><\/a>\u00a0and protective sleeves in non-ferrous metal smelting. They do not pollute the molten metal. They ensure the purity of finished products while resisting high-temperature melt erosion.<\/p>\n<figure id=\"attachment_21970\" aria-describedby=\"caption-attachment-21970\" style=\"width: 1278px\" class=\"wp-caption alignnone\"><img decoding=\"async\" class=\"size-full wp-image-21970 lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/06\/2-Silicon-Carbide-Crucibles.jpg\" alt=\"Silicon Carbide Crucibles\" width=\"1278\" height=\"720\" \/><figcaption id=\"caption-attachment-21970\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-full wp-image-21970 lazyload\" src=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/06\/2-Silicon-Carbide-Crucibles.jpg\" alt=\"Silicon Carbide Crucibles\" width=\"1278\" height=\"720\" srcset=\"https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/06\/2-Silicon-Carbide-Crucibles.jpg 1278w, https:\/\/nkmceramic.com\/wp-content\/uploads\/2026\/06\/2-Silicon-Carbide-Crucibles-768x433.jpg 768w\" sizes=\"(max-width: 1278px) 100vw, 1278px\" \/><\/noscript> Silicon Carbide Crucibles<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span><strong><b>FAQ<\/b><\/strong><strong><b>s<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong><b>What is the maximum safe working temperature of SiC in air?<\/b><\/strong><\/p>\n<p>SiC works stably below 1,500\u2103 in air. Its surface protective film remains intact. Oxidation accelerates obviously above 1,600\u2103.<\/p>\n<p><strong><b>Can silicon carbide resist hydrofluoric acid corrosion?<\/b><\/strong><\/p>\n<p>It resists single hydrofluoric acid. But a mixed solution of hydrofluoric acid and nitric acid will slowly corrode SiC materials.<\/p>\n<p><strong><b>Why do SiC parts fail in high-temperature alkaline environments?<\/b><\/strong><\/p>\n<p>High-temperature molten alkali decomposes the SiC molecular structure. It destroys surface protective film, causing continuous corrosion and peeling.<\/p>\n<p><strong><b>Does oxidized SiC lose its industrial use value?<\/b><\/strong><\/p>\n<p>No. Mild oxidation forms a dense SiO<sub>2<\/sub>\u00a0film, further improving surface corrosion resistance without affecting performance.<\/p>\n<p><strong><b>Can SiC be used for long-term waste gas treatment?<\/b><\/strong><\/p>\n<p>Yes. It resists sulfide and high-temperature flue gas corrosion. It is very suitable for industrial high-temperature waste gas purification equipment.<\/p>\n<p><strong><b>Is surface coating necessary for SiC industrial components?<\/b><\/strong><\/p>\n<p>No, for conventional high-temperature and acid environments. Coating is only required for long-term high-temperature alkaline working scenarios.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong><b>Conclusion<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Silicon carbide\u2019s chemical advantages determine its wide application in high-temperature smelting, chemical corrosion resistance, waste gas treatment and heat exchange equipment. When selecting SiC industrial components, you can match material performance with actual working media and temperature to maximize equipment stability and service life, avoid unnecessary waste and costs.<\/p>\n<p><a href=\"https:\/\/nkmceramic.com\/\"><u>Newthink New Materials<\/u><\/a>\u00a0is a professional silicon carbide manufacturer and supplier. We provide customized <a href=\"https:\/\/nkmceramic.com\/silicon-carbide-ceramic\/\"><u>SiC ceramic parts<\/u><\/a>\u00a0for different industrial conditions.<\/p>\n<p>Thanks for your reading. Hope this article will be helpful.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Reference\"><\/span><strong><b>Reference<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>[1] <a href=\"https:\/\/books.google.com\/books?hl=en&amp;lr=&amp;id=2jSPO_JtQwEC&amp;oi=fnd&amp;pg=PA1&amp;dq=silicon+carbide+chemical+properties&amp;ots=Mr6zF-slUz&amp;sig=vtay-ZUlCSur2ei9sFFOqeNSy3E\"><u>Kordina, O., &amp; Saddow, S. E. (2004). Silicon carbide overview.\u00a0<\/u><em><u><i>Advances in silicon carbide processing and applications<\/i><\/u><\/em><u>,\u00a0<\/u><em><u><i>1<\/i><\/u><\/em><u>, 2-3.<\/u><\/a><\/p>\n<p>[2] <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/B9780128041734001332\"><u>Mukasyan, A. S. (2017). Silicon carbide. In\u00a0<\/u><em><u><i>Concise encyclopedia of self-propagating high-temperature synthesis<\/i><\/u><\/em><u>\u00a0(pp. 336-338). Elsevier.<\/u><\/a><\/p>\n<p>[3] <a href=\"https:\/\/www.tandfonline.com\/doi\/abs\/10.1080\/10408430701718914\"><u>Presser, V., &amp; Nickel, K. G. (2008). Silica on silicon carbide.\u00a0<\/u><em><u><i>Critical reviews in solid state and materials sciences<\/i><\/u><\/em><u>,\u00a0<\/u><em><u><i>33<\/i><\/u><\/em><u>(1), 1-99.<\/u><\/a><\/p>\n<p>[4] <a href=\"https:\/\/journals.pnu.edu.ua\/index.php\/pcss\/article\/view\/6226\"><u>Soltys, L. M., Mironyuk, I. F., Mykytyn, I. M., Hnylytsia, I. D., &amp; Turovska, L. V. (2023). Synthesis and properties of silicon carbide.\u00a0<\/u><em><u><i>Physics and Chemistry of Solid State<\/i><\/u><\/em><u>,\u00a0<\/u><em><u><i>24<\/i><\/u><\/em><u>(1), 5-16.<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Silicon carbide (SiC)\u00a0is a high-performance ceramic material. Its unique chemical properties make it superior to traditional metals and ordinary ceramics. Unlike common brittle ceramics, silicon carbide maintains stable chemical activity under high temperature, strong corrosion and high-pressure environments. This article shows the 6 main chemical properties of silicon carbide. It [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":21969,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"disabled","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-21968","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Chemical Properties of Silicon Carbide<\/title>\n<meta name=\"description\" content=\"Learn 6 core chemical properties of silicon carbide (SiC) and explain how its oxidation resistance, acid tolerance and chemical stability benefit high-temperature, corrosion-resistant industrial applications.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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