D2092 Pdf — Astm

Due to environmental and health regulations surrounding hexavalent chromium, the use of traditional Treatment B has shifted toward eco-friendly trivalent or chrome-free alternatives in many regions. Treatment C: Aqueous Chromic Acid Treatment

Highly recommended for Materials Engineering libraries, Aerospace MRO facilities, and Adhesive Testing Laboratories.

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The standard outlines specific chemical and mechanical methods (categorized as Treatments A through F) to alter the zinc surface. These treatments eliminate contaminants, strip away detrimental passivating agents, and create a microscopic profile that anchors the paint film. Detailed Breakdown of ASTM D2092 Preparation Methods

High-performance industrial applications, factory OEM settings, and environments requiring maximum paint adhesion and corrosion resistance. Method B: Chromate Treatment Share public link The standard outlines specific chemical

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Uses chromic acid solutions to passivate the zinc. While effective, its use has declined significantly due to environmental and health regulations regarding hexavalent chromium. Method C: Aqueous Chromic-Organic Treatment Method B: Chromate Treatment If you are working

The phosphoric acid etches the zinc surface, while the resin simultaneously deposits a thin film (usually less than 0.5 mils).

Removing surface contaminants (oils, greases, dirt).