Composition and method of forming a black no-rinse...

Details Composition and method of forming a black no-rinse... Composition and method of forming a black no-rinse...

C - Chemistry, Metallurgy

23

C

C23C 22/28 (2006.01)

Patent

CA 2125593

-15- ABSTRACT OF THE DISCLOSURE A black, no-rinse conversion coating on metal surfaces is provided. The treatment of a metal such as aluminum or aluminum alloys with a composition of hexavalent chromium, a modified styrene acrylic resin, a carbon black thickeners, surfactants and coalescents results in a black no-rinse conversion coating. The black coating provides corrosion resistance and is resistant to gasoline, hot oil and ethylene glycol. The coating solution is particularly effective on co-plex shapes having closely spaced parts such as automotive radiators or condensers.

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