Oxalic acid treatment of carbon steel, galvanized steel and alum

Details Oxalic acid treatment of carbon steel, galvanized steel and alum Oxalic acid treatment of carbon steel, galvanized steel and alum

1980-10-16

1982-02-23

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 614A, 148 615R, C23C 720, C23C 722

Patent

active

043167527

ABSTRACT:
The surface of a metal, namely, carbon steel (automotive steel), galvanized steel and/or aluminum, can be modified by treating the metal surface with a dilute aqueous oxalic acid solution. The resultant oxalic acid treated metal surface can be further treated with a phosphatizing bath. Such dual treatment improves the corrosion resistance of the metal surface and is particularly useful in the treatment of lighter weight automobile bodies having joints of carbon steel, galvanized steel and/or aluminum.

REFERENCES:
patent: 1839488 (1932-01-01), Mason
patent: 2798015 (1957-07-01), Lesser
patent: 3355330 (1967-11-01), Rothkegel et al.
patent: 3547711 (1970-12-01), Ashdown
Streicher, Metal Finishing, Aug. 1948, pp. 61, 68.

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