Phosphating process

Details Phosphating process Phosphating process

1977-11-21

1979-04-03

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 615R, C23F 710, C23F 712, C23F 714

Patent

active

041475674

ABSTRACT:
Water-soluble lignosulphonate salts when present in an acid metal phosphating solution modify the physical form of sludge produced therein when the solution is used to treat a metal substrate. Process efficiency is improved.

REFERENCES:
patent: 2505457 (1950-04-01), Bird
patent: 2724668 (1955-11-01), Russell
patent: 2826552 (1958-03-01), Bonewitz et al.
patent: 3085975 (1963-04-01), Jennings
patent: 3751372 (1973-08-01), Zecher
patent: 3870573 (1975-03-01), Smith
Kejha, Chem. Abs. vol. 62: 13390b (1965).

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