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Full-Text Articles in Physical Sciences and Mathematics
Electrochemical Deposition Of Cr From Cr(Iii)-Based [Bmim]Hso4 And Naoac Electrolyte, De-Ying Liu, Wei Luo, Wen-Juan Zhang, Shuo-Zhen Hu, Heng Xu, Xin-Sheng Zhang
Electrochemical Deposition Of Cr From Cr(Iii)-Based [Bmim]Hso4 And Naoac Electrolyte, De-Ying Liu, Wei Luo, Wen-Juan Zhang, Shuo-Zhen Hu, Heng Xu, Xin-Sheng Zhang
Journal of Electrochemistry
Using trivalent chromium ions (Cr(III)) as the chromium source for chromium electrodeposition has attracted much attention since it can reduce the toxicity of the whole process. Even though the chromium deposition in Cr(III)-based ionic liquid bath can avoid the most hydrogen evolution problem, CrCl3·6H2O is widely used as the Cr(III) precursor, which still contains water and has the stable octahedral structure. As a result, it is difficult to deposit Cr and there is still hydrogen evolution reaction (HER). Moreover, the hydroxyl ions (OH-) produced during HER react with Cr3+ to form Cr(OH)3 …
Deposition Mechanism And Coating Characterization For The Trivalent Chromium Electrodeposition In Sulphate Electrolyte, Hui Yan, Shuai-Shuai Huang, Fang-Zu Yang, Zhong-Qun Tian, Shao-Min Zhou
Deposition Mechanism And Coating Characterization For The Trivalent Chromium Electrodeposition In Sulphate Electrolyte, Hui Yan, Shuai-Shuai Huang, Fang-Zu Yang, Zhong-Qun Tian, Shao-Min Zhou
Journal of Electrochemistry
Linear sweep voltammetry (LSV) and cyclic voltammetry (CV) were used to study the electrodeposition mechanism of trivalent chromium on a copper electrode in the novel sulphate electrolyte for thick trivalent chromium plating. The thickness, morphology, composition, microhardness, and structure, as well as the corrosion resistance in 3.5wt% NaCl solution of the trivalent chromium coatings were investigated by X-ray fluorescence gage, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), microhardness tester, X-ray diffraction (XRD) and Tafel curve measurements. The results showed that the electrodeposition of trivalent chromium involved two consecutive one electron reduction steps. The first step, Cr3+ + e …