Phosphate conversion coatings for metals with reduced coating we

Details Phosphate conversion coatings for metals with reduced coating we Phosphate conversion coatings for metals with reduced coating we

1982-01-25

1984-01-24

Silverberg, Sam

Metal treatment

Compositions

Heat treating

148 615Z, C23F 710

Patent

active

044274599

ABSTRACT:
A method and material for forming phosphate conversion coatings on ferrous metals such as iron and steel or non-ferrous metals such as zinc and aluminum employes aqueous acidic solutions containing a metal phosphate such as zinc phosphate, an accelerator such as sodium nitrite, and a crystal refining material which is an acidic organic phosphate or phosphonate having at least one free alcoholic hydroxyl group and where the phosphate is derived from a cyclic or branched chain organic alcohol.

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