Passivation resp. Chromating of aluminium parts features a good corrosion protection and is available in the surface variants colorless, yellow and green.

Other than anodized surfaces, passivated ones stay conductive and thus are suitable for use in electric devices.

Yellow chromated surfaces provide an excellent primer for varnishes and other organic coatings.

Passivated aluminium surfaces are visibly very appealing and broadly restistant against defilement through handling.

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Passivation of Zinc Surfaces