Aluminum Passivation This Cr3 passivated chromate can be used instead of conventional chromate (Cr6 passivated). This surface fishing reliably increases the corrosion resistance of aluminum materials. Alumite Through anodic oxidation, an alumina coating is formed on the surface of the aluminum alloy. This gives it superior corrosion resistance and a white color. Size fluctuations are equivalent to about half of the thickness of the coating. Hard Alumite Through anodic oxidation, a highly abrasion-resistant hard coating can be formed on the surfaces of aluminum die cast parts and aluminum machined components. It is used in compressor components that require abrasion-resistance and slide prevention.
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Alumite	Hard Alumite
Zinc-Aluminum Coating	Zinc-Aluminum Coating