ANODIZING AS A PRETREATMENT FOR ALUMINUM

摘要

Anodizing is an excellent pretreatment for nonclad aluminum prior to painting. Anodizing meeting the requirements of Mil-A-8625 is, in fact, a required pretreatment for aluminum used on the exterior of military aircraft. This section discusses nonchromic acid anodizing processes for aluminum to be used as a paint base. Although chromic acid anodizing is a viable base for paint, it is not discussed here because of the environmental and health problems posed by hexavalent chromium ion.