Research Progress of Chromium Electrodeposition from Deep Eutectic Solvents

FU Fei'e, XU Cunying, LI Jianru, WANG Shuxian

doi:10.16577/j.issn.1001-1560.2024.0188

Materials Protection >

2024 , Vol. 57 >Issue 8: 155 - 167

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0188

Research Progress of Chromium Electrodeposition from Deep Eutectic Solvents

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(1.Faculty of Metallurgical and Energy Engineering， Kunming University of Science and Technology， Kunming 650093， China；2.College of Chemical Engineering， Yunnan Open University/Yunnan Vocational and Technical College of National Defense Industry， Kunming 650500， China；3.State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization， Kunming 650093， China)

XU Cunying(1971-)， Professor， Ph.D.， Research Focus: Electrochemical Metallurgy Using Ionic Liquids，E-mail: xucunyin＠foxmail.com

Received date: 2023-11-15

Revised date: 2023-12-26

Accepted date: 2023-12-28

Online published: 2024-09-24

Supported by

National Natural Science Foundation of China(51764027)； Scientific Research Foundation of Yunnan Education Department(2023J0795)

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Abstract

Metal chromium coating has been widely used as decorative and functional coatings in the metallurgical and chemical industries due to its high hardness， excellent corrosion resistance and aesthetic appearance.The traditional chromium electroplating process uses hexavalent chromium electroplating.However， hexavalent chromium electrolytes are highly toxic and strong carcinogens， which harm human health and seriously pollute the environment.Trivalent chromium electroplating is considered one of the most important and effective processes to replace hexavalent chromium electroplating.However， due to the limitations of aqueous solutions， trivalent chromium electroplating exhibits shortcomings such as hydrogen evolution， difficulty in thickening the coating and low current efficiency， which restrict its development.Seeking a new electrolyte system that can replace aqueous solutions has become one of the research directions for trivalent chromium electroplating.As a new type of green solvent， deep eutectic solvents (DESs) show great promise in the electrodeposition of metals due to their advantages， including ease of synthesis， high electrical conductivity， wide electrochemical window and good solubility.They overcome the shortcomings of the high volatility of organic solvents， the complex preparation process of ionic liquids and high costs.In this paper， the physicochemical properties of deep eutectic solvents used for chromium electrodeposition and the forms in which metal ions exist within them were introduced.The research progress on chromium and its alloys electrodeposition in DESs was reviewed.The effects of additives on chromium electrodeposition in DESs were discussed.Issues related to chromium electrodeposition in DESs were analyzed， and directions for further research were explored.

Key words： deep eutectic solvents; chromium; electrodeposition; research progress

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FU Fei'e, XU Cunying, LI Jianru, WANG Shuxian . Research Progress of Chromium Electrodeposition from Deep Eutectic Solvents[J]. Materials Protection, 2024 , 57(8) : 155 -167 . DOI: 10.16577/j.issn.1001-1560.2024.0188

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