Composition and method of forming a black no-rinse conversion co

Details Composition and method of forming a black no-rinse conversion co Composition and method of forming a black no-rinse conversion co

1994-08-24

1995-08-15

Beck, Shrive

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273881, 524431, B05D 302

Patent

active

054417732

ABSTRACT:
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, 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 complex shapes having closely spaced parts such as automotive radiators or condensers.

REFERENCES:
patent: 4636264 (1987-01-01), Schellenberg et al.
patent: 4755434 (1988-07-01), Fujii et al.
patent: 4755435 (1988-07-01), Fujii et al.
patent: 4931317 (1990-06-01), Shima et al.
patent: 5006597 (1991-04-01), Luecke et al.

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