ASTM D2092 (and its successor D2651) is an indispensable document for anyone serious about structural adhesive bonding. While prospective buyers should verify if they need this specific withdrawn standard or the updated D2651, the technical content remains valid and widely used. It transforms the "art" of surface preparation into a repeatable science.
A variation using organic binders with chromic acid to create a thin, protective film. Method D: Acid-Copper Treatment astm d2092 pdf
The guide typically categorizes preparation into several distinct "treatments," depending on the environment and the type of paint being used: Chemical Etching (T-Wash): ASTM D2092 (and its successor D2651) is an
Method B: Wash PrimersThese are thin, vinyl-butyral-based primers containing phosphoric acid. They etch the surface while depositing a thin protective film. This is a common choice for field applications where complex chemical baths are not feasible. A variation using organic binders with chromic acid
The removal of oil, grease, and dirt using organic solvents. This is rarely sufficient on its own and is usually a preliminary step for other methods. Why the Standard Was Withdrawn
– Involves applying a specialized primer (like SSPC-Paint No. 27 ) that etches the surface while providing a thin film for the topcoat to grip.
Disclaimer: This post is for informational purposes only. Always refer to the latest official ASTM standard for regulatory or contractual requirements.