, offer zinc phosphate etching in safer, water-based formulas. Where to Find the PDF
Cleaning with alkaline cleaners or mineral spirits to remove grease, oil, and flux.
The PDF details precise chemical concentrations, bath temperatures, and contact times required to achieve compliance.
It prevents early blistering under the paint film by stabilizing the zinc surface chemistry. Treatment D: Acid Etch (Wash Primer) Treatment astm d2092 pdf
Test for the presence of factory-applied chromate storage treatments before selecting your ASTM D2092 method.
The ASTM D2092 standard is maintained and updated by ASTM International (Committee D01 on Paint and Related Coatings, Materials, and Applications). You can legally obtain the most up-to-date version, as well as historical versions, directly from the , or authorized standard distributors like IHS Markit (S&P Global), ANSI, and Techstreet. Conclusion
A specific variation using diluted chromic acid washed over the metal. , offer zinc phosphate etching in safer, water-based
If the galvanizing is too smooth, a light sweep blast is recommended to create a 1.0 to 1.5 mil profile.
The Department of Defense withdrew its adoption of ASTM D2092 in 2009, generally replacing it with ASTM D6386 . However, ASTM D2092 remains a foundational reference for specific techniques. What is ASTM D2092?
– Involves applying a specialized primer (like SSPC-Paint No. 27 ) that etches the surface while providing a thin film for the topcoat to grip. It prevents early blistering under the paint film
The ASTM D2092 PDF document includes the following sections:
The current standard can be searched, purchased, and downloaded directly from the official repository:
Essential guidelines for handling chemical treatments safely and in alignment with industrial standards.
Improper coating over galvanized steel is one of the most common—and expensive—failures in industrial finishing. By strictly implementing the surface preparation methodologies specified in the ASTM D2092 PDF, industries can transform a notoriously difficult, non-receptive zinc surface into a highly receptive substrate. Whether using the mechanical precision of sweep blasting (Treatment E) or the chemical efficiency of zinc phosphating (Treatment A), adhering to this standard ensures long-term coating durability and robust corrosion protection.
Hand or power tool sanding to roughen the surface if abrasive blasting is not possible. Methods of Treatment Listed in Original D2092