Phosphate conversion coatings with reduced coating weights...

Details Phosphate conversion coatings with reduced coating weights... Phosphate conversion coatings with reduced coating weights...

C - Chemistry, Metallurgy

23

C

148/17

C23C 22/10 (2006.01) C23C 22/07 (2006.01) C23C 22/36 (2006.01) C23C 22/77 (2006.01)

Patent

CA 1197760

-I- 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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