Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 31    No. 3    March 2021

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Physicochemical properties of 1,3-dimethyl-2-imidazolinone-ZnCl2 solvated ionic liquid and its application in zinc electrodeposition
Ai-min LIU1, Meng-xia GUO1, Zhong-ning SHI2, Yu-bao LIU3, Feng-guo LIU1, Xian-wei HU1, You-jian YANG1, Wen-ju TAO1, Zhao-wen WANG1

1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, China;
2. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China;
3. State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou Research Institute of Rare Earths, Baotou 014030, China

Abstract:Zinc chloride (ZnCl2) was dissolved in the 1,3-dimethyl-2-imidazolinone (DMI) solvent, and the metallic zinc coatings were obtained by electrodeposition in room-temperature ambient air. The conductivity (σ), viscosity (η), and density (ρ) of the DMI-ZnCl2 solvated ionic liquid at various temperatures (T) were measured and fitted. Furthermore, cyclic voltammetry was used to study the electrochemical behavior of Zn(II) in the DMI-ZnCl2 solvated ionic liquid, indicating that the reduction of Zn(II) on the tungsten electrode was a one-step two-electron transfer irreversible process. XRD and SEM-EDS analysis of the cathode product confirmed that the deposited coating was metallic zinc. Finally, the effects of deposition potential, temperature and duration on the morphology of zinc coatings were investigated. The results showed that a dense and uniform zinc coating was obtained by potentiostatic electro- deposition at -2 V (vs Pt) and 353 K for 1 h.


Key words: electrodeposition; zinc; 1,3-dimethyl-2-imidazolinone; physicochemical properties; cyclic voltammetry

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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