Inorganic Chemicals Industry ›› 2023, Vol. 55 ›› Issue (12): 26-35.doi: 10.19964/j.issn.1006-4990.2023-0209

• Reviews and Special Topics • Previous Articles     Next Articles

Research progress of trivalent chromium electrodeposition process

TIAN Yu1(), ZHANG Zheng1, ZHANG Xingran1(), CHEN Jie1, WANG Yan1, PENG Hao2   

  1. 1. College of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
    2. College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China
  • Received:2023-04-11 Online:2023-12-10 Published:2023-12-14
  • Contact: ZHANG Xingran E-mail:1184417240@qq.com;zhangxingran@cqut.edu.cn

Abstract:

Hexavalent chromium is commonly used in traditional chromium electrodeposition process,which can produce toxic acid fog and other polluting substances,resulting in environmental pollution.Compared with hexavalent chromium,trivalent chromium electrodeposition technology has the advantages of lower energy consumption,less toxicity and less pollution,so it has a long term application prospect.Due to the different ion deposition modes in different bath systems,the electrodeposition mechanism of chromium trivalent has not been fully elucidated,especially the intermediate process and control steps of chromium ion reduction.Therefore,it is the key to solve a series of problems in the deposition process to study the plating solution system and electrodeposition mechanism of trivalent chromium in different plating solutions.Chromium electrodeposition process includes chromium electroplating and electrolysis.Based on the trivalent chromium electrodeposition process,the electroplating and electrolysis were summarized and analyzed from two aspects,focusing on the mechanism of chromium electrodeposition,the composition and component application of chromium plating solution,and diaphragm chromium electrolysis.Finally,the future research direction of trivalent chromium electrodeposition was prospected,such as further improving the membrane electrolysis device and studying the nonlinear non-equilibrium behavior of chromium during deposition.

Key words: electrodeposition technology, trivalent chromium, chromium plating, chromium coating, chromium electrolysis, high purity chromium

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