A Study of the Effects of Water on the Electrochemical Properties and Characterization of Co-Zn Alloys from a Deep Eutectic Solvent | ||||
| Egyptian Journal of Chemistry | ||||
| Article 25, Volume 65, Issue 6, June 2022, Page 255-267 PDF (982.62 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2021.102437.4751 | ||||
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| Authors | ||||
Zena J. Mohammed; Hasan F. Alesary ; Luma M. Ahmed 
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| Department of Chemistry, College of Science, University of Kerbala, Kerbala, Iraq. | ||||
| Abstract | ||||
| Co-Zn alloy coatings have been electrodeposited on steel in choline chloride (ChCl) based liquid in the presence of various concentrations of water. The conductivities of Co, Zn, and Co-Zn electrolytes were found to improve through enhancing volumes of water. The speciation of Co in a Co-Zn electrolyte was investigated using UV-visible spectroscopy. A negative shifting in the Co species was detected when water was added to Co-Zn solutions. The cyclic voltammetry was used to examine the redox potential of the plating solutions, from which it was found that when water was added to Co, Zn, and Co-Zn electrolytes. The redox maximum frequency rises and changes in a progressive direction. Scanning electron microscopy (SEM) was used to examine the morphologies of films. By enhancing the volume of water, the morphology of the deposited Co-Zn coating was found to change. The compositions of Co-Zn coatings made from the electrolyte with water were found to be 19.83 wt% Zn and 80.13 wt% Co. The roughness of the Co-Zn film deposit was reduced to about 7.642 nm when the deposition was achieved from a bath containing 20% water. The X-ray Diffraction (XRD) technique was involved to investigate the XRD pattern of the Co-Zn deposits. | ||||
| Keywords | ||||
| Electrodeposition; Co-Zn alloy; deep eutectic solvents; additives (water) | ||||
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