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Hard Anodize

Hard (Hardcoat) Anodize (Type III Anodize) is an electrolitic process used when an extreme surface hardness or density are required.  Due to the thicker coating (0.5 to 6 mili-inches), the thickness of hard anodize must be accounted for since it does alter the dimensions of the part.  As a result, hard anodize is a very common and effective tool to salvage otherwise unusable parts due to over-machining or incorrect honing.  A bright dip or black dye is often applied after the hard anodize for aesthetic purposes.