Method and compositions for coating aluminum

Details Method and compositions for coating aluminum Method and compositions for coating aluminum

1978-09-06

1980-03-04

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 315, 260 296M, 427388C, C23F 700, B44D 136

Patent

active

041915968

ABSTRACT:
This invention relates to a method and compositions for coating aluminum in order to improve both corrosion resistance and paint adhesion. By using a coating composition consisting essentially of (a) polyacrylic acid or esters thereof and (b) at least one acid selected from the group consisting of H.sub.2 ZrF.sub.6, H.sub.2 TiF.sub.6, and H.sub.2 SiF.sub.6, the characteristics of the treated aluminum surfaces are improved, while process waste disposal problems associated with conventional chrome/phosphate coating are avoided.

REFERENCES:
patent: 3682713 (1972-08-01), Ries et al.
patent: 3912548 (1975-10-01), Faigen

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