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anodizing

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anodizing

Process that increases the resistance to corrosion of a metal, such as aluminium, by building up a protective oxide layer on the surface. The natural corrosion resistance of aluminium is provided by a thin film of aluminium oxide; anodizing increases the thickness of this film and thus the corrosion protection.

It is so called because the metal becomes the anode in an electrolytic bath containing a solution of, for example, sulphuric or chromic acid as the electrolyte. During electrolysis oxygen is produced at the anode, where it combines with the metal to form an oxide film.



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? Mentioned in ? References in periodicals archive
 
Grain refining also enhances the properties of the cast component, producing castings with increased pressure tightness and mechanical properties, better response to heat treatment, more uniform anodizing and improved machinability.
Casting answers & advice by Modern Casting
In a presentation of the proposed regulations, Air Resources Board officials say, "Despite stringent regulation, chrome plating and chromic acid anodizing facilities continue to be a source of adverse exposures, especially to nearby people.
Cal-OSHA sets rules on keeping workers safe from heat by Fine, Howard / Los Angeles Business Journal
A 3mm thick j57S anodizing quality aluminium was used; this carries a warranty which guarantees durability and colour uniformity, even when different batches of J57S are used.
Alcan. (Specifier's Information) by The Architectural Review
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