{"id":69937,"date":"2026-05-17T17:28:58","date_gmt":"2026-05-17T17:28:58","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/astm-b136\/"},"modified":"2026-05-19T15:32:21","modified_gmt":"2026-05-19T15:32:21","slug":"astm-b136","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/astm-b136\/","title":{"rendered":"ASTM B136"},"content":{"rendered":"<h2>ASTM B136 technical regulation: quality control of aluminum anodizing<\/h2>\n<p>The ASTM B136 standard establishes a precision method for quality control of anodic oxide coatings on aluminum and its alloys. The main objective of the procedure is to evaluate the density and sealing of the oxide layer by checking its ability to adsorb dyes after exposure to an acidic solution. In the expert practice of EV Group China, this test is used to confirm the corrosion resistance of surfaces operated in aggressive atmospheric conditions.<\/p>\n<p>A high-quality formed and sealed anodic coating should demonstrate minimal ability to absorb coloring pigments. The absence of staining after the test indicates a high degree of material protection.<\/p>\n<p>The technology is applicable to anodic coatings used in industrial and architectural construction, where protection against corrosion and the preservation of decorative surface properties are critical.<\/p>\n<p><em>Note 1: The ASTM B136 test is an indicator of porosity and the quality of the oxide film sealing. This methodology does not replace tests for resistance to pitting corrosion or other types of material degradation.<\/em><\/p>\n<p><em>Note 2: For class I and II anodic coatings obtained in electrolytes with a minimum content of silicates (less than 15 mg\/l) or phosphates (less than 3 mg\/l), the preliminary acid treatment stage may be excluded from the verification regulation.<\/em><\/p>\n<p>When testing coatings with a deep original color, the interpretation of results is based on a comparative analysis of the color intensity of the control sample and the test area.<\/p>\n<p><strong>The ASTM B136 methodology does not apply to the following types of coatings:<\/strong><\/p>\n<ul>\n<li>Anodic films obtained in a chromic acid environment.<\/li>\n<li>Coatings on aluminum alloys with a mass fraction of Cu > 2% or Si > 4.5%.<\/li>\n<li>Layers formed exclusively in dichromate solutions.<\/li>\n<li>Surfaces that have undergone specialized hydrophobic treatment.<\/li>\n<\/ul>\n<p>All measurements within this standard are carried out in the SI system, ensuring the accuracy and repeatability of results for the production tasks of EV Group China.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[112],"class_list":["post-69937","wiki","type-wiki","status-publish","hentry","wiki_category-astm"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69937","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69937\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69937"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69937"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}