This paper covers the properties of hardcoat anodizing as it applies to changing surface properties of aluminum so it can be used in areas heretofore prohibitive. Information concerning surface preparation, racking, equipment for the process, and post treatments is presented.
Hardcoat anodizing changes the surface properties of aluminum so that it can now be used in many new applications.
The process employs a refrigerated electrolyte maintained below 50 F, vigorous agitation, close control of processing conditions, and a higher current density than conventional anodizing.
Specifics about the process at Cessna Aircraft Co. are presented, as is a discussion of racking, surface preparation, and post treatment. The properties of the anodize-coated aluminum and the resultant possible applications are also described.
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