Isn't anodizing the coloration process of aluminum's normal oxidation
   process, of which alodyning is but one normally used on aircraft parts?
   jofarr, soddy tn


http://en.wikipedia.org/wiki/Anodizing#Anodized_aluminium

says that anodization allows the coloration which is dye absorbed into
the oxidation layer.

http://en.wikipedia.org/wiki/Aluminium_oxide

says that while pure aluminum forms a tough layer of oxidation the
alloys need a little help.

Jeffrey Martin



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