Trivalent Passivate Produces Iridescent Film for Corrosion Resistance

TriPass ELV 2500LT from MacDermid is a trivalent chromium passivate designed to produce an iridescent film on electroplated zinc deposits from acid and alkaline electrolytes.

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TriPass ELV 2500LT from MacDermid is a trivalent chromium passivate designed to produce an iridescent film on electroplated zinc deposits from acid and alkaline electrolytes. When used with an approved topcoat, it produces a silver-like finish that maintains corrosion resistance, even after baking.

The passivate does not contain hexavalent chrome, and is said to be easy to operate and control. Waste water also is easy to treat, the company says. It has high tolerance to metallic contamination for improved solution life. The passivate is suited for both rack and barrel applications. 

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