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Black zinc passivation

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Black zinc passivator
Black zinc passivation
Electroplating and chemical nickel
Chemical nickel
Aluminum alloy chemical zinc
Pearl nickel

HLD-243 black zinc passivation

1. It is completely free of hexavalent chromium and is a trivalent chromium black coating agent for galvanizing.2. Corrosion resistance (salt spray test) is the same as hexavalent chromium phosphate black film3. The appearance of the film is a black film with almost no multi-interference c…
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