{"id":6318,"date":"2026-10-06T15:07:23","date_gmt":"2026-10-06T08:07:23","guid":{"rendered":"https:\/\/dk-metalsurfacetreatment.com\/?p=6318"},"modified":"2026-10-06T16:31:06","modified_gmt":"2026-10-06T09:31:06","slug":"why-passivate-zam-steel","status":"publish","type":"post","link":"https:\/\/dk-metalsurfacetreatment.com\/en\/why-passivate-zam-steel\/","title":{"rendered":"Why Passivate ZAM Steel? Surface Protection Solution After Plating"},"content":{"rendered":"<p data-rm-block-id=\"block-1\"><span dir=\"auto\">In ZAM steel production, the Zn\u2013Al\u2013Mg coating provides high corrosion resistance, but <\/span><span dir=\"auto\">the durability of the coating does not depend solely on the alloy composition<\/span><span dir=\"auto\"> . After the coating process, the surface still needs to be controlled and protected to limit reactions with the environment, maintain its appearance, and meet processing requirements.<\/span><\/p>\n<p data-rm-block-id=\"block-2\"><span dir=\"auto\">That is why <\/span><span dir=\"auto\">passivation for Zam steel<\/span><span dir=\"auto\"> has become an important step in modern Zam steel surface treatment systems.<\/span><\/p>\n<p data-rm-block-id=\"block-2\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 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:\/\/dk-metalsurfacetreatment.com\/en\/why-passivate-zam-steel\/#What_is_ZAM_roofing\" >What is ZAM roofing?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/dk-metalsurfacetreatment.com\/en\/why-passivate-zam-steel\/#What_is_ZAM_passivation\" >What is ZAM passivation?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/dk-metalsurfacetreatment.com\/en\/why-passivate-zam-steel\/#Why_should_we_passivate_ZAM\" >Why should we passivate ZAM?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/dk-metalsurfacetreatment.com\/en\/why-passivate-zam-steel\/#Some_common_passivation_chemicals_for_ZAM_roofing\" >Some common passivation chemicals for ZAM roofing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/dk-metalsurfacetreatment.com\/en\/why-passivate-zam-steel\/#Value_Added_from_DK-CHEMICLAS\" >Value Added from DK-CHEMICLAS<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-rm-block-id=\"block-3\"><span class=\"ez-toc-section\" id=\"What_is_ZAM_roofing\"><\/span><span style=\"font-size: 90%;\"><strong><span dir=\"auto\">What is ZAM roofing?<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-rm-block-id=\"block-4\"><span dir=\"auto\">ZAM steel is a type of steel coated with a <\/span><span dir=\"auto\">zinc-aluminum-magnesium (Zn-Al-Mg)<\/span><span dir=\"auto\"> alloy . The name ZAM comes from the chemical symbols of the three main components: <\/span><span dir=\"auto\">Zn (Zinc), Al (Aluminum), and Mg (Magnesium)<\/span><span dir=\"auto\"> .<\/span><\/p>\n<p data-rm-block-id=\"block-5\"><span dir=\"auto\">ZAM coatings contain approximately <\/span><span dir=\"auto\">6% aluminum and 3% magnesium<\/span><span dir=\"auto\"> , developed to enhance the protection and durability of the product. Thanks to its Zn\u2013Al\u2013Mg coating structure, ZAM steel sheets have superior corrosion resistance compared to some traditional coated steel systems such as galvanized steel and Galfan.<\/span><\/p>\n<p data-rm-block-id=\"block-6\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-6309 size-full\" src=\"https:\/\/dk-metalsurfacetreatment.com\/wp-content\/uploads\/2026\/10\/ton-mag-shiel.png\" alt=\"Passive approach for Zam\" width=\"504\" height=\"457\" \/><\/p>\n<p data-rm-block-id=\"block-7\"><span dir=\"auto\">However, the inherent corrosion resistance of the plating <\/span><span dir=\"auto\">does not mean that the ZAM surface is completely immune to environmental influences<\/span><span dir=\"auto\"> . During storage, transportation, processing, and use, the surface may be exposed to moisture, water, oxygen, fingerprints, or other agents.<\/span><\/p>\n<p data-rm-block-id=\"block-8\"><span dir=\"auto\">Therefore, after plating, a solution is needed to <\/span><span dir=\"auto\">stabilize and control the surface condition<\/span><span dir=\"auto\"> .<\/span><\/p>\n<h2 data-rm-block-id=\"block-9\"><span class=\"ez-toc-section\" id=\"What_is_ZAM_passivation\"><\/span><span id=\"Thu_dong_hoa_ton_ZAM_la_gi\" class=\"ez-toc-section\"><\/span><span style=\"font-size: 90%;\"><strong><span dir=\"auto\">What is ZAM passivation?<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-rm-block-id=\"block-10\"><span dir=\"auto\">Passivation for Zam steel<\/span><span dir=\"auto\"> is a chemical treatment process that forms a <\/span><span dir=\"auto\">protective transformation layer on the surface of the plating<\/span><span dir=\"auto\"> , thereby limiting direct contact and interaction between the metal and the external environment.<\/span><\/p>\n<p data-rm-block-id=\"block-11\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-6312 \" src=\"https:\/\/dk-metalsurfacetreatment.com\/wp-content\/uploads\/2026\/10\/3-scaled.png\" sizes=\"auto, (max-width: 745px) 100vw, 745px\" srcset=\"https:\/\/dk-metalsurfacetreatment.com\/wp-content\/uploads\/2026\/10\/3-scaled.png 2560w, https:\/\/dk-metalsurfacetreatment.com\/wp-content\/uploads\/2026\/10\/3-1536x838.png 1536w, https:\/\/dk-metalsurfacetreatment.com\/wp-content\/uploads\/2026\/10\/3-2048x1117.png 2048w\" alt=\"3 scaled\" width=\"745\" height=\"406\" \/><\/p>\n<p data-rm-block-id=\"block-12\"><span dir=\"auto\">To put it simply:<\/span><\/p>\n<p data-rm-block-id=\"block-13\"><strong><span dir=\"auto\">ZAM surface after plating \u2192 Passivation treatment \u2192 Formation of a protective film \u2192 Limits environmental impact<\/span><\/strong><\/p>\n<p data-rm-block-id=\"block-14\"><span dir=\"auto\">This film is very thin but plays a crucial role in controlling the reactions occurring on the metal surface.<\/span><\/p>\n<p data-rm-block-id=\"block-15\"><span dir=\"auto\">For Zn\u2013Al\u2013Mg coatings, current passivation technologies can develop in several directions, most notably:<\/span><\/p>\n<ul>\n<li data-rm-block-id=\"block-16\"><strong><span dir=\"auto\">Chrome III Passivation (Cr\u00b3 <\/span><\/strong><strong><span dir=\"auto\">\u207a)<\/span><\/strong><\/li>\n<li data-rm-block-id=\"block-17\"><strong><span dir=\"auto\">Chrome-free passivation<\/span><\/strong><\/li>\n<\/ul>\n<p data-rm-block-id=\"block-18\"><span dir=\"auto\">In particular, Cr3+ systems can form films containing chromium phosphate compounds combined with organic silica components; while Cr-free technology can use <\/span><span dir=\"auto\">silane and water-based resins<\/span><span dir=\"auto\"> to create a protective network on the surface.<\/span><\/p>\n<h2 data-rm-block-id=\"block-19\"><span class=\"ez-toc-section\" id=\"Why_should_we_passivate_ZAM\"><\/span><span id=\"Tai_sao_phai_thu_dong_hoa_cho_ton_ZAM\" class=\"ez-toc-section\"><\/span><span style=\"font-size: 90%;\"><strong><span dir=\"auto\">Why should we passivate ZAM?<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-rm-block-id=\"block-20\"><span dir=\"auto\">This is a crucial question for any ZAM sheet metal production line.<\/span><\/p>\n<p data-rm-block-id=\"block-21\"><span dir=\"auto\">If the Zn\u2013Al\u2013Mg plating already offers good corrosion resistance, why is an additional chemical treatment step still necessary?<\/span><\/p>\n<p data-rm-block-id=\"block-22\"><span dir=\"auto\">The answer lies in <\/span><span dir=\"auto\">the stability of the surface after plating<\/span><span dir=\"auto\"> .<\/span><\/p>\n<h3 data-rm-block-id=\"block-23\"><span style=\"font-size: 90%;\"><strong><span dir=\"auto\">Enhances surface protection against environmental impacts.<\/span><\/strong><\/span><\/h3>\n<p data-rm-block-id=\"block-24\"><span dir=\"auto\">Even highly corrosion-resistant coatings are still affected by moisture, oxygen, and environmental conditions during storage and use.<\/span><\/p>\n<p data-rm-block-id=\"block-25\"><span dir=\"auto\">Passivation creates a transformation layer on the surface, which helps <\/span><span dir=\"auto\">limit direct interaction between the plating layer and the environment<\/span><span dir=\"auto\"> , thereby helping to maintain the protective properties of the coating.<\/span><\/p>\n<p data-rm-block-id=\"block-26\"><span dir=\"auto\">In other words, if the Zn\u2013Al\u2013Mg layer is <\/span><span dir=\"auto\">the \u201cmain protective barrier<\/span><strong><span dir=\"auto\">\u201d<\/span><\/strong><span dir=\"auto\"> , then the Passivation layer can be seen as <\/span><span dir=\"auto\">an additional surface control layer<\/span><span dir=\"auto\"> , helping the protection system to operate more stably.<\/span><\/p>\n<h3 data-rm-block-id=\"block-27\"><span style=\"font-size: 90%;\"><strong><span dir=\"auto\">Minimize unwanted surface variations.<\/span><\/strong><\/span><\/h3>\n<p data-rm-block-id=\"block-28\"><span dir=\"auto\">One of the key requirements for commercially available ZAM steel sheets is not only corrosion resistance but also maintaining <\/span><span dir=\"auto\">a stable surface appearance<\/span><span dir=\"auto\"> .<\/span><\/p>\n<p data-rm-block-id=\"block-29\"><span dir=\"auto\">The surface after plating may continue to undergo chemical reactions when exposed to the environment. The passivation layer helps control these interactions, contributing to maintaining a more uniform surface condition during storage and transportation.<\/span><\/p>\n<p data-rm-block-id=\"block-30\"><span dir=\"auto\">This is a particularly important factor for ZAM products that require high standards of <\/span><span dir=\"auto\">appearance, cleanliness, and surface stability<\/span><span dir=\"auto\"> .<\/span><\/p>\n<h3 data-rm-block-id=\"block-31\"><span style=\"font-size: 90%;\"><strong><span dir=\"auto\">Reduce the risk of surface-related problems.<\/span><\/strong><\/span><\/h3>\n<p data-rm-block-id=\"block-32\"><span dir=\"auto\">In actual production, a satisfactory ZAM surface is not judged solely by its corrosion resistance.<\/span><\/p>\n<p data-rm-block-id=\"block-33\"><span dir=\"auto\">Manufacturers also need to consider:<\/span><\/p>\n<p data-rm-block-id=\"block-34\"><strong><span dir=\"auto\">Corrosion resistance \u2192 Appearance \u2192 Antifingerprint \u2192 Formability \u2192 Storage stability \u2192 Compatibility with subsequent coatings.<\/span><\/strong><\/p>\n<p data-rm-block-id=\"block-35\"><span dir=\"auto\">This is also the development trend of ZAM surface treatment chemicals: from solutions focused solely on <\/span><span dir=\"auto\">passivation to <\/span><span dir=\"auto\">multi-functional<\/span><span dir=\"auto\"> treatment systems .<\/span><\/p>\n<h3 data-rm-block-id=\"block-36\"><span style=\"font-size: 90%;\"><strong><span dir=\"auto\">Support for machining and surface quality requirements.<\/span><\/strong><\/span><\/h3>\n<p data-rm-block-id=\"block-37\"><span dir=\"auto\">ZAM steel sheets are typically subjected to further processing steps such as forming, rolling, cutting, or surface treatment.<\/span><\/p>\n<p data-rm-block-id=\"block-38\"><span dir=\"auto\">Therefore, post-plating treatment chemicals are increasingly designed not only to protect the surface but also to support requirements for <\/span><span dir=\"auto\">friction, formability, and surface condition<\/span><span dir=\"auto\"> .<\/span><\/p>\n<p data-rm-block-id=\"block-39\"><span dir=\"auto\">This is why next-generation passivation systems often incorporate <\/span><strong><span dir=\"auto\">TOC (Thin Organic Coating)<\/span><\/strong><span dir=\"auto\"> functionality instead of simply creating a passive film.<\/span><\/p>\n<h2 data-rm-block-id=\"block-40\"><span class=\"ez-toc-section\" id=\"Some_common_passivation_chemicals_for_ZAM_roofing\"><\/span><span id=\"Mot_so_hoa_chat_thu_dong_hoa_pho_bien_cho_ton_ZAM\" class=\"ez-toc-section\"><\/span><span style=\"font-size: 90%;\"><strong><span dir=\"auto\">Some common passivation chemicals for ZAM roofing<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-rm-block-id=\"block-41\"><span style=\"font-size: 90%;\"><strong><span dir=\"auto\">PrimeCoat\u00ae Z838 \u2013 Chrome III Passivator with TOC<\/span><\/strong><\/span><\/h3>\n<p data-rm-block-id=\"block-42\"><span dir=\"auto\">PrimeCoat\u00ae Z838 is a <\/span><span dir=\"auto\">phosphate\/silane<\/span><span dir=\"auto\"> -based ZAM surface treatment solution , designed for multi-functional applications.<\/span><\/p>\n<p data-rm-block-id=\"block-43\"><span dir=\"auto\">Depending on the process conditions and the amount of material to be processed, Z838 can be used in the following ways:<\/span><\/p>\n<ul>\n<li data-rm-block-id=\"block-44\"><strong><span dir=\"auto\">Passive mode based on Chrome III.<\/span><\/strong><\/li>\n<li data-rm-block-id=\"block-45\"><strong><span dir=\"auto\">Water-based Cr3+ surface treatment.<\/span><\/strong><\/li>\n<li data-rm-block-id=\"block-46\"><strong><span dir=\"auto\">Fluoride-free.<\/span><\/strong><\/li>\n<li data-rm-block-id=\"block-47\"><strong><span dir=\"auto\">Meets RoHS requirements according to technical documentation<\/span><\/strong><span dir=\"auto\"> .<\/span><\/li>\n<\/ul>\n<p data-rm-block-id=\"block-48\"><span dir=\"auto\">Notably, <\/span><span dir=\"auto\">PrimeCoat\u00ae Z838-4P<\/span><span dir=\"auto\"> is adjustable in terms of coating quantity. Depending on the application requirements, the product can function as a Chrome III passivation layer or create a <\/span><span dir=\"auto\">thin organic TOC<\/span><span dir=\"auto\"> layer on the metal surface after plating.<\/span><\/p>\n<p data-rm-block-id=\"block-49\"><span dir=\"auto\">As a result, the processing system can add features such as:<\/span><\/p>\n<p data-rm-block-id=\"block-50\"><strong><span dir=\"auto\">Anti-fingerprint \u2013 reduces friction \u2013 supports shaping.<\/span><\/strong><\/p>\n<p data-rm-block-id=\"block-51\"><span dir=\"auto\">A notable aspect of Z838 is its processing philosophy, which goes beyond simply <\/span><span dir=\"auto\">&#8220;corrosion protection&#8221;<\/span><span dir=\"auto\"> and aims to simultaneously enhance the surface quality and machinability of ZAM steel.<\/span><\/p>\n<p data-rm-block-id=\"block-52\"><strong><span dir=\"auto\">View product details here \u21d3<\/span><\/strong><\/p>\n<table style=\"height: 5px; background-color: #253782; width: 205px;\" border=\"1\" width=\"205\">\n<tbody>\n<tr>\n<td style=\"width: 195px;\">\n<p class=\"entry-title\" style=\"text-align: center;\" data-rm-block-id=\"block-53\"><span style=\"color: #ffffff;\"><a style=\"color: #ffffff;\" href=\"https:\/\/dk-metalsurfacetreatment.com\/thu-dong-hoa-chrome-iii-cho-kim-loai\/\"><strong><span dir=\"auto\">PRIMECOAT\u00ae Z838<\/span><\/strong><\/a><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 data-rm-block-id=\"block-54\"><strong><span dir=\"auto\">PrimeCoat\u00ae Z908 VH \u2013 Towards Chrome-Free Passive Technology<\/span><\/strong><\/h3>\n<p data-rm-block-id=\"block-55\"><span dir=\"auto\">If the Z838 represents the <\/span><span dir=\"auto\">Chrome III<\/span><span dir=\"auto\"> direction , then <\/span><span dir=\"auto\">the PrimeCoat\u00ae Z908 VH<\/span><span dir=\"auto\"> takes the <\/span><span dir=\"auto\">Non-Chrome<\/span><span dir=\"auto\"> direction .<\/span><\/p>\n<p data-rm-block-id=\"block-56\"><span dir=\"auto\">Z908 VH is a water-based passivation chemical, developed using <\/span><span dir=\"auto\">Phosphate\/Silane<\/span><span dir=\"auto\"> technology , and is geared towards chrome-free passivation technology.<\/span><\/p>\n<p data-rm-block-id=\"block-57\"><span dir=\"auto\">According to the provided documentation, Z908 VH:<\/span><\/p>\n<ul>\n<li data-rm-block-id=\"block-58\"><strong><span dir=\"auto\">Does not contain Cr(VI).<\/span><\/strong><\/li>\n<li data-rm-block-id=\"block-59\"><strong><span dir=\"auto\">Does not contain other forms of chromium.<\/span><\/strong><\/li>\n<li data-rm-block-id=\"block-60\"><strong><span dir=\"auto\">Aiming to meet environmental requirements such as RoHS and REACH.<\/span><\/strong><\/li>\n<\/ul>\n<p data-rm-block-id=\"block-61\"><span dir=\"auto\">One notable point is that when applied at concentrations above <\/span><span dir=\"auto\">50%<\/span><span dir=\"auto\"> , Z908 VH can function as a <\/span><span dir=\"auto\">Thin Organic Coating (TOC)<\/span><span dir=\"auto\"> . This opens up possibilities for combination:<\/span><\/p>\n<p data-rm-block-id=\"block-62\"><strong><span dir=\"auto\">Non-Chrome Passivation + TOC<\/span><\/strong><\/p>\n<p data-rm-block-id=\"block-63\"><span dir=\"auto\">Instead of focusing solely on corrosion resistance, the treatment system can simultaneously aim for:<\/span><\/p>\n<ul>\n<li data-rm-block-id=\"block-64\"><strong><span dir=\"auto\">Minimize fingerprints.<\/span><\/strong><\/li>\n<li data-rm-block-id=\"block-65\"><strong><span dir=\"auto\">Maintain a clean and uniform appearance.<\/span><\/strong><\/li>\n<li data-rm-block-id=\"block-66\"><strong><span dir=\"auto\">Helps reduce friction.<\/span><\/strong><\/li>\n<li data-rm-block-id=\"block-67\"><strong><span dir=\"auto\">Improve machining capabilities.<\/span><\/strong><\/li>\n<\/ul>\n<p data-rm-block-id=\"block-68\"><span dir=\"auto\">This approach aligns with the trend of reducing and eliminating chromium in modern surface treatment chemicals.<\/span><\/p>\n<p data-rm-block-id=\"block-69\"><strong><span dir=\"auto\">View product details here \u21d3<\/span><\/strong><\/p>\n<table style=\"height: 5px; width: 199px; background-color: #253782;\" border=\"1\" width=\"199\">\n<tbody>\n<tr>\n<td style=\"width: 189px;\">\n<p style=\"text-align: center;\" data-rm-block-id=\"block-70\"><span style=\"color: #ffffff;\"><a style=\"color: #ffffff;\" href=\"https:\/\/dk-metalsurfacetreatment.com\/?p=4817&amp;preview=true\"><strong><span dir=\"auto\">PrimeCoat\u00ae Z908 VH<\/span><\/strong><\/a><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 data-rm-block-id=\"block-71\"><span style=\"font-size: 90%;\"><strong><span dir=\"auto\">Passivation is not just a processing step \u2013 it is a determining factor in the surface quality of ZAM.<\/span><\/strong><\/span><\/h3>\n<p data-rm-block-id=\"block-72\"><span dir=\"auto\">ZAM steel is developed to enhance corrosion resistance thanks to its Zn\u2013Al\u2013Mg coating. However, to maximize the value of the coating, <\/span><span dir=\"auto\">post-coating surface control<\/span><span dir=\"auto\"> remains a crucial requirement.<\/span><\/p>\n<p data-rm-block-id=\"block-73\"><span dir=\"auto\">Passivation helps create a protective transformation layer, limiting direct interaction between the metal and the environment. When combined with TOC technology, the treatment system can also be expanded to meet increasingly important market requirements such as <\/span><span dir=\"auto\">antifingerprint, appearance, friction, and formability<\/span><span dir=\"auto\"> .<\/span><\/p>\n<p data-rm-block-id=\"block-74\"><span dir=\"auto\">Therefore, the choice of chemical passivation for ZAM steel should not be based solely on the question <\/span><strong><span dir=\"auto\">&#8220;<\/span><\/strong><span dir=\"auto\">does it provide good corrosion protection?<\/span><strong><span dir=\"auto\">&#8220;<\/span><\/strong><span dir=\"auto\"> , but rather on a holistic assessment:<\/span><\/p>\n<p data-rm-block-id=\"block-75\"><strong><span dir=\"auto\">Plating composition \u2192 Passivation technology \u2192 Treatment layer quantity \u2192 Appearance requirements \u2192 Processing \u2192 Storage \u2192 Final intended use.<\/span><\/strong><\/p>\n<p data-rm-block-id=\"block-76\"><span dir=\"auto\">In the modern ZAM steel sheet manufacturing trend, <\/span><span dir=\"auto\">PrimeCoat\u00ae Z838 and PrimeCoat\u00ae Z908 VH<\/span><span dir=\"auto\"> are two technological approaches that clearly demonstrate the shift from single-function processing to <\/span><span dir=\"auto\">multi-functional surface protection systems<\/span><span dir=\"auto\"> , simultaneously meeting the requirements for protection, appearance, and machinability of the product.<\/span><\/p>\n<p data-rm-block-id=\"block-78\"><span dir=\"auto\">ZAM passivation is not an &#8220;add-on&#8221; step after the plating process, but a crucial part of the surface quality control strategy<\/span><strong><span dir=\"auto\">.<\/span><\/strong><span dir=\"auto\"> When properly selected and controlled, the passivation system can help ZAM steel maintain a more stable surface, enhance corrosion resistance, and meet increasingly demanding requirements for appearance, processing, and environmental performance.<\/span><\/p>\n<p data-rm-block-id=\"block-79\"><span dir=\"auto\">In particular, the development of <\/span><span dir=\"auto\">Cr\u00b3\u207a <\/span><span dir=\"auto\">and <\/span><span dir=\"auto\">Cr-free systems combined with TOC<\/span><span dir=\"auto\"> is opening up a new approach: transforming the post-coating treatment from a simple protective layer into <\/span><span dir=\"auto\">a multifunctional surface treatment system for next-generation ZAM steel sheets<\/span><span dir=\"auto\"> .<\/span><\/p>\n<hr data-rm-block-id=\"block-80\" \/>\n<h2 data-rm-block-id=\"block-81\"><span class=\"ez-toc-section\" id=\"Value_Added_from_DK-CHEMICLAS\"><\/span><span id=\"Gia_Tri_Gia_Tang_Tu_DK-_CHEMICLAS\" class=\"ez-toc-section\"><\/span><strong><span dir=\"auto\">Value Added from DK-CHEMICLAS<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"isSelectedEnd\" data-rm-block-id=\"block-82\"><span dir=\"auto\">In addition to supplying AD CHEMICALS surface treatment chemicals <\/span><strong><span dir=\"auto\">, DK CHEMICALS<\/span><\/strong><span dir=\"auto\"> also supports customers in optimizing production processes and improving line operational efficiency.<\/span><\/p>\n<p class=\"isSelectedEnd\" data-rm-block-id=\"block-83\"><span dir=\"auto\">Key features include:<\/span><\/p>\n<p data-rm-block-id=\"block-84\"><span style=\"color: #253782;\"><strong><span dir=\"auto\">In-depth technical consulting.<\/span><\/strong><\/span><\/p>\n<p data-rm-block-id=\"block-85\"><span style=\"color: #253782;\"><strong><span dir=\"auto\">Optimize production costs.<\/span><\/strong><\/span><\/p>\n<p data-rm-block-id=\"block-86\"><span style=\"color: #253782;\"><strong><span dir=\"auto\">Improve product quality<\/span><\/strong><\/span><\/p>\n<p data-rm-block-id=\"block-87\"><span style=\"color: #253782;\"><strong><span dir=\"auto\">Reduce the error rate in production.<\/span><\/strong><\/span><\/p>\n<p data-rm-block-id=\"block-88\"><span style=\"color: #253782;\"><strong><span dir=\"auto\">Increase competitiveness in the market.<\/span><\/strong><\/span><\/p>\n<p data-rm-block-id=\"block-89\"><span style=\"color: #253782;\"><strong><span dir=\"auto\">Support the deployment of environmentally friendly technologies.<\/span><\/strong><\/span><\/p>\n<p class=\"isSelectedEnd\" data-rm-block-id=\"block-90\"><span dir=\"auto\"><span style=\"color: #253782;\"><a style=\"color: #253782;\" href=\"https:\/\/dk-chemicals.vn\/danh-muc-san-pham\/danh-muc-san-pham\/hoa-chat-thu-dong\/\" target=\"_blank\" rel=\"noopener\"><strong>DK CHEMICALS<\/strong><\/a><\/span> &#8216; team of experts has practical experience in continuous production lines, helping customers choose the most suitable solution for each type of material and specific technical requirement. Contact us for expert advice!<\/span><\/p>\n<p data-rm-block-id=\"block-86\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2636 alignleft\" src=\"https:\/\/dk-metalsurfacetreatment.com\/wp-content\/uploads\/2026\/05\/logo-new-1-300x300.png\" alt=\"DK Chemical Company Limited\" width=\"199\" height=\"199\" srcset=\"https:\/\/dk-metalsurfacetreatment.com\/wp-content\/uploads\/2026\/05\/logo-new-1-300x300.png 300w, https:\/\/dk-metalsurfacetreatment.com\/wp-content\/uploads\/2026\/05\/logo-new-1-150x150.png 150w, https:\/\/dk-metalsurfacetreatment.com\/wp-content\/uploads\/2026\/05\/logo-new-1-768x768.png 768w, https:\/\/dk-metalsurfacetreatment.com\/wp-content\/uploads\/2026\/05\/logo-new-1.png 1024w\" sizes=\"auto, (max-width: 199px) 100vw, 199px\" \/><\/p>\n<h3 data-rm-block-id=\"block-87\"><span style=\"color: #253782; font-size: 90%;\"><strong><span dir=\"auto\" style=\"vertical-align: inherit;\">DK Chemical Company Limited<\/span><\/strong><\/span><\/h3>\n<p data-rm-block-id=\"block-88\"><span style=\"color: #253782;\"><strong><span dir=\"auto\" style=\"vertical-align: inherit;\">Address:<\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"> 50 Street No. 12, Cityland Park Hills Residential Area, Go Vap Ward, Ho Chi Minh City<\/span><\/span><\/p>\n<p data-rm-block-id=\"block-89\"><span style=\"color: #253782;\"><strong><span dir=\"auto\" style=\"vertical-align: inherit;\">Hotline: <\/span><\/strong>\u00a0<a style=\"color: #253782;\" href=\"tel:0909678599\"><span dir=\"auto\" style=\"vertical-align: inherit;\">0909678599<\/span><\/a><\/span><\/p>\n<p data-rm-block-id=\"block-90\"><span style=\"color: #253782;\"><strong><span dir=\"auto\" style=\"vertical-align: inherit;\">Email: <\/span><\/strong>\u00a0<a style=\"color: #253782;\" href=\"mailto:de@dk-chemicals.vn\"><span dir=\"auto\" style=\"vertical-align: inherit;\">de@dk-chemicals.vn<\/span><\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In ZAM steel production, the Zn\u2013Al\u2013Mg coating provides high corrosion resistance, but the durability of the coating does not depend solely on the alloy composition . After the coating process, the surface still needs to be controlled and protected to limit reactions with the environment, maintain its appearance, and meet processing requirements. That is why<\/p>\n","protected":false},"author":9,"featured_media":6310,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-6318","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/posts\/6318","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/comments?post=6318"}],"version-history":[{"count":5,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/posts\/6318\/revisions"}],"predecessor-version":[{"id":6323,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/posts\/6318\/revisions\/6323"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/media\/6310"}],"wp:attachment":[{"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/media?parent=6318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/categories?post=6318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/tags?post=6318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}