{"id":2468,"date":"2026-01-30T08:59:47","date_gmt":"2026-01-30T08:59:47","guid":{"rendered":"https:\/\/huilicoating.com\/?p=2468"},"modified":"2026-04-14T09:03:56","modified_gmt":"2026-04-14T09:03:56","slug":"epoxy-vs-polyurethane-coating-steel-structures","status":"publish","type":"post","link":"https:\/\/huilicoating.com\/fr\/epoxy-vs-polyurethane-coating-steel-structures\/","title":{"rendered":"Rev\u00eatement \u00e9poxy vs rev\u00eatement polyur\u00e9thane : lequel est le meilleur pour les projets de structures en acier ?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"2468\" class=\"elementor elementor-2468\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-149bc85f e-flex e-con-boxed e-con e-parent\" data-id=\"149bc85f\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-220e8b9a elementor-widget elementor-widget-text-editor\" data-id=\"220e8b9a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Epoxy and polyurethane are not \u201ceither-or\u201d in most steel structure projects\u2014engineers usually specify them\u00a0<strong>together<\/strong>: epoxy for corrosion barrier and build, polyurethane for UV\/weathering and appearance as the finish coat. ISO 12944-5 notes that most epoxy coatings chalk when exposed to sunlight and recommends applying a suitable topcoat if color or gloss retention is required, which is why polyurethane is commonly used as a topcoat outdoors.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6910f108 elementor-widget elementor-widget-image\" data-id=\"6910f108\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"448\" src=\"https:\/\/huilicoating.com\/wp-content\/uploads\/2026\/01\/epoxy-polyurethane-coating-system-steel.webp-1024x573.jpg\" class=\"attachment-large size-large wp-image-2473\" alt=\"Epoxy primer and intermediate with polyurethane topcoat coating system on steel structure\" srcset=\"https:\/\/huilicoating.com\/wp-content\/uploads\/2026\/01\/epoxy-polyurethane-coating-system-steel.webp-1024x573.jpg 1024w, https:\/\/huilicoating.com\/wp-content\/uploads\/2026\/01\/epoxy-polyurethane-coating-system-steel.webp-300x168.jpg 300w, https:\/\/huilicoating.com\/wp-content\/uploads\/2026\/01\/epoxy-polyurethane-coating-system-steel.webp-768x430.jpg 768w, https:\/\/huilicoating.com\/wp-content\/uploads\/2026\/01\/epoxy-polyurethane-coating-system-steel.webp-600x336.jpg 600w, https:\/\/huilicoating.com\/wp-content\/uploads\/2026\/01\/epoxy-polyurethane-coating-system-steel.webp.jpg 1440w\" sizes=\"(max-width: 800px) 100vw, 800px\" title=\"\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5572fdfe elementor-widget elementor-widget-text-editor\" data-id=\"5572fdfe\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"what-is-epoxy-coating\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">What Is Epoxy Coating?<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Epoxy coatings are widely used in industrial corrosion protection because they provide strong adhesion and form an effective barrier film when applied at the correct thickness. In ISO 12944 context, epoxy is a common coating type in protective paint systems for steel structures.<span class=\"inline-flex\" aria-label=\"[PDF] INTERNATIONAL STANDARD ISO 12944-5\" data-state=\"closed\">\u200b<\/span><\/p><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Key properties (engineering view)<\/h3><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Strong barrier protection (when specified with sufficient DFT and proper surface preparation)<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Excellent role as\u00a0<strong>primer<\/strong>\u00a0or\u00a0<strong>intermediate\/high-build<\/strong>\u00a0layer in multi-coat systems<span class=\"inline-flex\" aria-label=\"[PDF] INTERNATIONAL STANDARD ISO 12944-5\" data-state=\"closed\">\u200b<\/span><\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Many epoxies chalk under sunlight, so exterior appearance typically requires a topcoat.<span class=\"inline-flex\" aria-label=\"[PDF] INTERNATIONAL STANDARD ISO 12944-5\" data-state=\"closed\">\u200b<\/span><\/p><\/li><\/ul><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Typical locations in a steel coating system<\/h3><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Primer:<\/strong>\u00a0epoxy primer (often used on blasted steel)<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Intermediate:<\/strong>\u00a0high-build epoxy for barrier thickness and durability build-up<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2a46ea60 elementor-widget elementor-widget-text-editor\" data-id=\"2a46ea60\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"epoxy-vs-polyurethane-key-differences\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">Epoxy vs Polyurethane: Key Differences<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">This section matches \u201ccomparative intent\u201d and helps EPC\/procurement choose correctly.<\/p><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Corrosion resistance (where the barrier is built)<\/h3><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">In most steel systems, the corrosion barrier is primarily delivered by the epoxy layers (primer + intermediate) through adhesion and film build, rather than by the topcoat alone. ISO 12944 positions epoxy coatings as standard components in protective paint systems for steel.<span class=\"inline-flex\" aria-label=\"[PDF] INTERNATIONAL STANDARD ISO 12944-5\" data-state=\"closed\">\u200b<\/span><\/p><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">UV resistance (why epoxy alone is risky outdoors)<\/h3><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">ISO 12944-5 states that most epoxy coatings chalk when exposed to sunlight and that a suitable topcoat should be applied when color or gloss retention is required.<span class=\"inline-flex\" aria-label=\"[PDF] INTERNATIONAL STANDARD ISO 12944-5\" data-state=\"closed\">\u200b<\/span><\/p><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Mechanical strength (impact\/abrasion reality)<\/h3><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Project experience: abrasion and impact often occur at walkways, handrails, edges, and bolt connections\u2014these details need stripe coats and correct DFT distribution more than \u201cone magic resin.\u201d (Final mechanical performance depends on formulation and TDS.)<\/p><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Application environment (indoor vs outdoor, shop vs site)<\/h3><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Epoxy and PU can both be applied in shop or field, but curing windows, humidity control, and recoat intervals need management to avoid adhesion issues (project-dependent). ISO 12944 emphasizes that system selection and performance depend on correct application and environment considerations.<span class=\"inline-flex\" aria-label=\"[PDF] INTERNATIONAL STANDARD ISO 12944-5\" data-state=\"closed\">\u200b<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-623916b1 elementor-widget elementor-widget-text-editor\" data-id=\"623916b1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"epoxy--polyurethane-coating-system-explained\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">Epoxy + Polyurethane Coating System Explained<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Most engineering specs use epoxy + polyurethane because it is a balanced system: epoxy provides corrosion resistance and thickness build; polyurethane provides weathering resistance and finish durability. ISO 12944-5 explicitly supports this logic by noting epoxy chalking in sunlight and the need for a suitable topcoat when appearance retention is required.<span class=\"inline-flex\" aria-label=\"[PDF] INTERNATIONAL STANDARD ISO 12944-5\" data-state=\"closed\">\u200b<\/span><\/p><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Typical system structure (guide only; confirm by TDS\/spec)<\/h3><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Primer:<\/strong>\u00a0zinc-rich primer or epoxy primer (project-dependent)<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Intermediate:<\/strong>\u00a0high-build epoxy (barrier thickness)<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\"><strong>Topcoat:<\/strong>\u00a0aliphatic polyurethane topcoat (UV\/weathering)<\/p><\/li><\/ul><p>If you want a system-based recommendation for steel structures (primer + intermediate + topcoat), start here:<br \/>Anchor: <a href=\"https:\/\/huilicoating.com\/areas-of-application\/steel-structure-coating-industrial-anti-corrosion-solutions\/\"><span style=\"color: #3366ff;\">[Steel Structure Coating Solutions] -&gt;<\/span><\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-328fcc57 elementor-widget elementor-widget-text-editor\" data-id=\"328fcc57\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"which-one-should-you-choose-for-your-project\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">Which One Should You Choose for Your Project?<\/h2><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Choose epoxy (as a primer\/intermediate) when:<\/h3><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">The structure needs strong corrosion barrier and film build<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">The environment is industrial\/marine and you need a robust undercoat system<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">The topcoat may be optional for indoor, non-UV exposure (project-dependent)<\/p><\/li><\/ul><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Choose polyurethane (as a topcoat) when:<\/h3><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">The steel is outdoors or exposed to sunlight and appearance retention matters<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">You need a durable finish coat over epoxy layers<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">The spec requires a UV-stable topcoat (common for exterior steelwork)<span class=\"inline-flex\" aria-label=\"[PDF] INTERNATIONAL STANDARD ISO 12944-5\" data-state=\"closed\">\u200b<\/span><\/p><\/li><\/ul><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Practical selection by environment, budget, and service life<\/h3><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Higher corrosivity + longer durability targets typically demand more disciplined system design and QC, not just a \u201cbetter resin.\u201d ISO 12944 links durability expectations to protective paint system selection and environment conditions.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5d4bb20 elementor-widget elementor-widget-text-editor\" data-id=\"5d4bb20\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"qualityinspection-checklist-dft-recoat-surface-pre\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">Quality\/inspection checklist (DFT, recoat, surface prep)<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Use this to reduce rework and speed up approvals.<\/p><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Surface prep<\/h3><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Confirm prep method per spec (blast\/power-tool) and cleanliness<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Pay special attention to edges, welds, crevices, bolts (stripe coat)<\/p><\/li><\/ul><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">DFT (Dry Film Thickness)<\/h3><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Measure primer, intermediate, and topcoat thickness separately<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Use DFT ranges; confirm final targets by project spec and TDS<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Record readings with location mapping (QC log)<\/p><\/li><\/ul><h3 class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base first:mt-0\">Recoat interval<\/h3><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Track time\/temperature\/humidity between coats<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">If window is exceeded, abrade\/clean per procedure before recoating (project-dependent)<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5de55f86 elementor-widget elementor-widget-text-editor\" data-id=\"5de55f86\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"rfq-checklist-near-the-end\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">RFQ Checklist (near the end)<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">To get an accurate quote and system recommendation, provide:<\/p><ul class=\"marker:text-quiet list-disc\"><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Steel structure type (workshop, bridge, power plant, offshore topsides, etc.)<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Location and exposure: indoor\/outdoor, coastal\/marine, industrial pollutants<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Target durability\/service life expectation (years or L\/M\/H classification)<span class=\"inline-flex\" aria-label=\"[PDF] INTERNATIONAL STANDARD ISO 12944-5\" data-state=\"closed\">\u200b<\/span><\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Surface preparation capability (blast or power-tool)<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Area (m\u00b2) and steel complexity (edges\/weld density)<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Preferred system: epoxy primer + epoxy build + PU topcoat (or request recommendation)<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Color\/finish requirements<\/p><\/li><li class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [&amp;&gt;p]:pt-0 [&amp;&gt;p]:mb-2 [&amp;&gt;p]:my-0\"><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Documents needed: TDS, SDS, application &amp; inspection procedure<\/p><\/li><\/ul><div class=\"group relative\">\u00a0<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9cd39af elementor-widget elementor-widget-text-editor\" data-id=\"9cd39af\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"cta-contact-us-for-system-recommendation\" class=\"mb-2 mt-4 [.has-inline-images_&amp;]:clear-end font-sans visRefresh2026AnswerSerif:font-editorial font-semimedium visRefresh2026Fonts:font-bold text-base visRefresh2026Fonts:text-lg first:mt-0 md:text-lg [hr+&amp;]:mt-4\">CTA: Contact us for system recommendation<\/h2><p class=\"my-2 [&amp;+p]:mt-4 [&amp;_strong:has(+br)]:inline-block [&amp;_strong:has(+br)]:pb-2\">Send your environment description, surface prep method, and durability target to HUILI Coating to receive a complete epoxy + polyurethane system recommendation (including DFT ranges by coat, TDS\/SDS, and quotation). ISO 12944-5 supports using suitable topcoats when appearance retention is required and provides coating-type guidance for protective systems.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-65c3d1a1 e-con-full e-flex e-con e-parent\" data-id=\"65c3d1a1\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-11df7b8d e-con-full e-flex e-con e-child\" data-id=\"11df7b8d\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-77f194f1 elementor-widget elementor-widget-heading\" data-id=\"77f194f1\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Contact Us<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-485c1aa0 elementor-widget elementor-widget-heading\" data-id=\"485c1aa0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">We would love to speak with you.<br>Feel free to reach out using the below details.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-58bc61c5 e-con-full e-flex e-con e-child\" data-id=\"58bc61c5\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-57a83304 elementor-button-align-start elementor-tablet-button-align-center elementor-widget elementor-widget-form\" data-id=\"57a83304\" data-element_type=\"widget\" data-settings=\"{&quot;step_next_label&quot;:&quot;Next&quot;,&quot;step_previous_label&quot;:&quot;Previous&quot;,&quot;button_width&quot;:&quot;100&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"Contact Form\">\n\t\t\t<input type=\"hidden\" name=\"post_id\" value=\"2468\"\/>\n\t\t\t<input type=\"hidden\" name=\"form_id\" value=\"57a83304\"\/>\n\t\t\t<input type=\"hidden\" name=\"referer_title\" value=\"\" \/>\n\n\t\t\t\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-name elementor-col-50 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-name\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tYour Name\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[name]\" id=\"form-field-name\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Your Name*\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-field_b743cd7 elementor-col-50 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_b743cd7\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tLast Name\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[field_b743cd7]\" id=\"form-field-field_b743cd7\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Last Name*\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-tel elementor-field-group elementor-column elementor-field-group-field_6c180a9 elementor-col-50 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_6c180a9\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tPhone Number\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t<input size=\"1\" type=\"tel\" name=\"form_fields[field_6c180a9]\" id=\"form-field-field_6c180a9\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Phone Number*\" required=\"required\" pattern=\"[0-9()#&amp;+*-=.]+\" title=\"Only numbers and phone characters (#, -, *, etc) are accepted.\">\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-email elementor-field-group elementor-column elementor-field-group-email elementor-col-50 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-email\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tEmail\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"email\" name=\"form_fields[email]\" id=\"form-field-email\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Email*\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-textarea elementor-field-group elementor-column elementor-field-group-message elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-message\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\tMessage\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t<textarea class=\"elementor-field-textual elementor-field  elementor-size-sm\" name=\"form_fields[message]\" id=\"form-field-message\" rows=\"4\" placeholder=\"Message\"><\/textarea>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-group elementor-column elementor-field-type-submit elementor-col-100 e-form__buttons\">\n\t\t\t\t\t<button class=\"elementor-button elementor-size-sm\" type=\"submit\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Send<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/form>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Epoxy and polyurethane are not \u201ceither-or\u201d in most steel structure projects\u2014engineers usually specify them\u00a0together: epoxy for corrosion barrier and build, polyurethane for UV\/weathering and appearance as the finish coat. ISO 12944-5 notes that most epoxy coatings chalk when exposed to sunlight and recommends applying a suitable topcoat if color or gloss retention is required, which [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2473,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[99],"tags":[],"class_list":["post-2468","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-guides-inspection"],"acf":[],"_links":{"self":[{"href":"https:\/\/huilicoating.com\/fr\/wp-json\/wp\/v2\/posts\/2468","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/huilicoating.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/huilicoating.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/huilicoating.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/huilicoating.com\/fr\/wp-json\/wp\/v2\/comments?post=2468"}],"version-history":[{"count":1,"href":"https:\/\/huilicoating.com\/fr\/wp-json\/wp\/v2\/posts\/2468\/revisions"}],"predecessor-version":[{"id":4129,"href":"https:\/\/huilicoating.com\/fr\/wp-json\/wp\/v2\/posts\/2468\/revisions\/4129"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/huilicoating.com\/fr\/wp-json\/wp\/v2\/media\/2473"}],"wp:attachment":[{"href":"https:\/\/huilicoating.com\/fr\/wp-json\/wp\/v2\/media?parent=2468"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/huilicoating.com\/fr\/wp-json\/wp\/v2\/categories?post=2468"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/huilicoating.com\/fr\/wp-json\/wp\/v2\/tags?post=2468"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}