Phosphonic/phosphinic acid bonded to aluminum hydroxide layer

Details Phosphonic/phosphinic acid bonded to aluminum hydroxide layer Phosphonic/phosphinic acid bonded to aluminum hydroxide layer

1989-08-23

1991-10-22

Silverberg, Sam

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148274, 148275, 148250, C23C 2256

Patent

active

050592580

ABSTRACT:
Disclosed is a method of producing a functionalized layer and an aluminum hydroxide layer on an aluminum substrate, the aluminum hydroxide layer located between the substrate and the functionalized layer. The method comprises the steps of subjecting an aluminum substrate to a hydrothermal treatment in an aqueous solution having a pH in the range of 2 to 14 to form a layer of aluminum hydroxide on said substrate and thereafter treating said aluminum substrate with a phosphorus-containing acid selected from phosphonic and phosphonic acid to form a functionalized layer on said aluminum hydroxide layer, the functionalized layer comprised of the reaction product of said acid and the layer of aluminum hydroxide.

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"The Surface Treatment and Finishing of Aluminum and its Alloys", Wernick, S. ASM, Fifth Ed., vol. 1.

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