Hard anodized for aluminum or hard anodizing aluminum
is similar to standard anodizing
in that are controlled by electrochemical
processes. The difference of hard anodizing provides a surface
more wear resistant and has a smoother and harder surface than standard
anodizing. Hard anodizing aluminum will result a uniform aluminum oxide layer on the surface that penetrate the
material pores. Anodizing process condition for hard anodizing involved by
submersing part in sulfuric acid solution at room temperature from 20 minutes
two hours. The longer time submerged determines the thickness of coating.
Aluminum oxide formed in the surface during hardcoat anodizing is more uniform,
dense, and much harder than the natural oxidation. Hard anodized is more focus on the properties of anodized oxide strength than aesthetics.
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