Phosphate coating composition

Details Phosphate coating composition Phosphate coating composition

1978-04-13

1979-09-25

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Corrosion inhibiting coating composition

148 615Z, 252387, 422 12, C09D 512, C23F 710

Patent

active

041689836

ABSTRACT:
This invention relates to phosphating ferrous metal surfaces and more particularly, to new phosphating compositions characterized by the use of a cyclic trimetaphosphate as one of the phosphates comprising the phosphating composition. The cyclic trimetaphosphate permits lower operating temperature, increases the concentration tolerance of the phosphating solution to dissolved iron and provides an improved phosphate coating that is thinner, smoother and more corrosion resistant.

REFERENCES:
patent: 2332209 (1943-10-01), Enquist
patent: 2743204 (1956-04-01), Russell
patent: 3181976 (1965-05-01), Yager
patent: 4022887 (1977-05-01), Harris et al.

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