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Study on Trivalent Chromium Iridescent Passivation Process for Zinc Coating

Ning Li

Abstract

A new trivalent chromium iridescent passivation process for zinc coating is developed through probing test,orthogonal experiment and single-factor test.The iridescent passivation film is also tested by Tafel curve test,impedance measurement and corrosion current test and neutral salt spray test.The experimental results show that the iridescent passivation film has a good corrosion resistance,which can withstand 96 hours of neutral salt spray test without white rust.

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Available abstract

Key concepts: Passivation, Materials science, Corrosion, Zinc, Salt spray test, Iridescence, Tafel equation, Coating