C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
204/9
C25D 1/08 (2006.01) B01D 71/02 (2006.01) C04B 38/00 (2006.01) C25D 11/04 (2006.01)
Patent
CA 1266251
ABSTRACT POROUS FILMS AND METHODS OF FORMING THEM An anodic aluminium oxide film (12) has a system of larger pores (14) extending in from one face (16) and interconnecting with a system of smaller pores (24) extending in from the other face (26). The film is made by anodizing an aluminium metal substrate, then reducing the applied voltage at a rate to permit partial or complete recovery of the oxide film, either continuously or incrementally in small steps down to a level preferably below 3 V, and separating the oxide film from the substrate.
493031
Davidson Alexander Philip
Furneaux Robin Christopher
Rigby William Roy
Fetherstonhaugh & Co.
Whatman International Limited
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