Hydrophilic surface-treating process for an aluminum article

Details Hydrophilic surface-treating process for an aluminum article Hydrophilic surface-treating process for an aluminum article

C - Chemistry, Metallurgy

23

C

117/205

C23C 22/37 (2006.01) C23C 22/38 (2006.01) C23C 22/74 (2006.01)

Patent

CA 1248419

ABSTRACT OF THE DISCLOSURE The invention envolves a nonrinse type hydrophilic surface-treating process capable of imparting hydrophilicity to the surface of a metal material and, at the same time, forming thereon a coating excelling in resistance to corro- sion. The agent used in the process is a aqueous solution which contains Cr ion (III, VI), F- , SiO2 and acrylic acid polymer, and PO4-3, if necessary. An A? article treated the agent is suitable for fins of a heat exchanger. - 1 -

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