ANODIC ALUMINIUM OXIDE FILMS
An anodic oxide film is formed on aluminium strip by continuously passing the strip through a phosphoric acid electrolyte at from 25 DEG C. to 80 DEG C., the contact time between the strip and the electrolyte being not more than 15 seconds during which time the strip is anodized at a current density...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | An anodic oxide film is formed on aluminium strip by continuously passing the strip through a phosphoric acid electrolyte at from 25 DEG C. to 80 DEG C., the contact time between the strip and the electrolyte being not more than 15 seconds during which time the strip is anodized at a current density of at least 250 A/m2. In the resulting film, the pores are enlarged so that the effected surface area is increased. The film forms an excellent substrate for lacquer, paint, or adhesive. |
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