Composition and process for treating magnesium-containing metals

Details Composition and process for treating magnesium-containing metals Composition and process for treating magnesium-containing metals

1997-03-21

1999-05-04

Simmons, David A.

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148261, 148262, 148275, C23C 2207

Patent

active

059000740

ABSTRACT:
The formation on the surface of Mg-containing metal of a highly corrosion-resistant, highly rust-inhibiting, and strongly paint-adherent conversion coating, using a chromic acid free treatment bath, is achieved by treatment with a pH 2.0-5.0 aqueous bath that contains phosphoric acid, manganese ion, and amine, thereby forming a conversion coating that contains P--Mn and Mn--N and/or other nitrogen compounds.

REFERENCES:
patent: 5645650 (1997-07-01), Ishizaki et al.

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