Metal surface hydrophilicizing process and composition

Details Metal surface hydrophilicizing process and composition Metal surface hydrophilicizing process and composition

C - Chemistry, Metallurgy

09

D

117/201, 400/641

C09D 133/26 (2006.01) B05D 7/16 (2006.01) C08L 33/02 (2006.01)

Patent

CA 1333309

A durable hydrophilic surface can be formed on metals by coating them with a composition containing a first water soluble polymer based on polyacrylamide, a second water soluble polymer with at least 60 mole percent of ionizable groups such as acids and quaternary ammonium salts, and a cross linking agent. Water soluble chromium and zirconium salts that can form complexes with the first water soluble polymer are preferred crosslinking agents. The invention is particularly useful for aluminum to be used in heat exchangers.

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