Method of applying phosphate conversion coatings to Fe-R-B subst

Details Method of applying phosphate conversion coatings to Fe-R-B subst Method of applying phosphate conversion coatings to Fe-R-B subst

1988-12-22

1991-11-26

Silverberg, Sam

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148302, 148254, C23C 2214

Patent

active

050679902

ABSTRACT:
A method for applying a phosphate conversion coating atop an iron-rare earth-boron alloy not normally susceptible to phosphating includes the step of applying a compatible metal layer to the alloy substrate before phosphatizing. The metal layer can be an alloy or an elemental metal, preferably zinc or nickel, and optimally nickel. The rare earth in the alloy is optimally neodymium. Any of the conventionally known metal coating and phosphating procedures can be generally employed in the method of the invention. An article having an iron-rare earth-boron substrate and a phosphate conversion coating atop the substrate, preferably formed as the product of the disclosed method, is also disclosed.

REFERENCES:
patent: 4437947 (1984-03-01), Saito
patent: 4837114 (1989-06-01), Hamada

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