Conversion coating solution for treating metal surfaces

Details Conversion coating solution for treating metal surfaces Conversion coating solution for treating metal surfaces

1988-10-13

1990-05-22

Silverberg, Sam

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

C23C 2214, C23C 2223

Patent

active

049274724

ABSTRACT:
A conversion coating, predominantly consisting of tin phosphate, can be deposited on steel or tin plated steel surfaces by contact with a solution containing phosphate ions, tin ions, an oxidizing agent such as chlorate, and a chelating agent for the tin ions, the latter to prevent the rapid loss of tin from the solution that otherwise would occur. A coating that confers excellent resistance to corrosion in hot water is formed on drawn and ironed thinly tin plated cans.

REFERENCES:
patent: 2930723 (1960-03-01), Drysdale et al.
patent: 3530012 (1970-09-01), Nakamura
patent: 4220486 (1980-09-01), Matsushima
patent: 4306917 (1981-12-01), Oda

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