Post phosphating inhibiting rinse

Details Post phosphating inhibiting rinse Post phosphating inhibiting rinse

1977-05-25

1978-11-07

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 615Z, C23F 710

Patent

active

041244141

ABSTRACT:
Phosphated ferrous metal surfaces are treated with a rinse containing citric acid and sodium nitrite to enhance corrosion protection. This rinse has the advantages of providing an effluent which is not objectionable from an environmental viewpoint and does not stain the treated surfaces.

REFERENCES:
patent: 2250508 (1941-07-01), Thompson
patent: 3079288 (1963-02-01), Schneider
patent: 3110684 (1963-11-01), Miller
patent: 3507795 (1970-04-01), Gardner

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