Research of Anti-Corrosion of Armour Steel in Surface Chromate Conversion Coating

Abstract:

This article by orthogonal experimental method to determine the composition of chromate conversion and use of electrochemical method of electrochemical corrosion of the film discussed the substrate in different components, content, time and pH of chromate conversion coating of corrosion resistance. Orthogonal to determine the best experimental chromate conversion solution by adding the rare earth element cerium and lanthanum salt, and discuss the effects of rare earth elements cerium and lanthanum chromate conversion film on the anti-corrosion. The results show that in CrO₃ 5.4 g/L, NaF 0.5 g/L, K₃Fe (CN)₆ 0.5 g/L, pH 1, conversion time is three minutes, there is a better corrosion resistance. The rare earth elements in a chromate conversion solution, La₂(CO₃)₃ to 0.2 g/L chromate conversion coating of the anti-corrosion better.

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 2332-2337
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.2332
• Online since: August 2013
• Authors: Rui Hua Guo, Fang Sheng Liu, Lin Min Wang
• Keywords: Chromate Conversion, Corrosion, Polarization Curve, Rare Earth

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