VP Finish’s Hardcoat (Type III) Anodizing is an engineering coating that provides vastly improved hardness (typically 60-70 HRc) and wear resistance due to its inherent natural hardness and lubricity (as compared to standard anodizing 48-55 HRc). It is an electrochemical process done at refrigerated temperatures to grow a uniformly hard, thick layer of aluminum oxide (which is equivalent in hardness to sapphire) on aluminum substrates. Our Hardcoat Anodizing can also increase both electrical resistance and thermal insulation of machined aluminum parts.

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