Process and apparatus for electrolytic colouration of...

Details Process and apparatus for electrolytic colouration of... Process and apparatus for electrolytic colouration of...

C - Chemistry, Metallurgy

25

D

204/24.6

C25D 11/22 (2006.01) C25D 17/00 (2006.01)

Patent

CA 1100087

ABSTRACT A continuous length of aluminium is anodised during passage through an anodising electrolyte and then coloured during passage through an inorganic colouring electrolyte, in which a counterelectrode s immersed. In the electrolytic colouring stage alternating current with a superimposed D.C. compound is preferably passed between the anodised aluminium and the counterelectrode when the electrolyte is appropriate for such treatment. The alternating current circuit for the electrolytic colouring stage is preferably completed via an electrode immersed in the anodising electrolyte at a position facing substantially unanodised aluminium so as to effect a liquid contact. -1-

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