Chromate conversion composition and method for coating aluminum

Details Chromate conversion composition and method for coating aluminum Chromate conversion composition and method for coating aluminum

1978-03-31

1978-12-26

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 62, 148 627, C23F 726

Patent

active

041314891

ABSTRACT:
This invention relates to a composition and method for coating aluminum in order to improve both corrosion resistance and paint adhesion. By using very low concentrations of hexavalent chromium ions, phosphate ions and fluoride ions in the coating composition, the characteristics of the treated aluminum surfaces are improved, while process waste disposal problems are minimized.

REFERENCES:
patent: 2438877 (1948-03-01), Spruance
patent: 2494910 (1950-01-01), Spruance
patent: 2928763 (1960-03-01), Russell
patent: 3377212 (1968-04-01), Newhard
patent: 3385738 (1968-05-01), Russell

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