Process for sealing anodised aluminium

Details Process for sealing anodised aluminium Process for sealing anodised aluminium

C - Chemistry, Metallurgy

25

D

204/21.5

C25D 11/18 (2006.01) C25D 11/24 (2006.01)

Patent

CA 1140890

ABSTRACT PROCESS FOR SEALING ANODISED ALUMINIUM A process for sealing anodic oxide films on aluminium comprises immersing the anodised aluminium in a bath containing an aqueous solution of a sealing accelerator, preferably triethanolamine, at a pH of 7 to 11, followed by conventional treatment in a hot water bath containing an anti-smut additive. The preliminary accelerator treatment allows the sealing step to be substantially accelerated and permits the production of an essentially smut-free surface on the sealed anodic oxide film.

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