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Electrochemical Properties of Electrodepositing Ni–Mo Alloys Films in Sulfate-Chloride Bath

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The electrochemical properties of electrodepositing Ni–Mo alloys films in sulfate-chloride bath were investigated by the electrochemical methods of AC impedance (EIS), cyclic voltammetry and cathodic polarization curves. The results showed that the electrodeposition of Ni–Mo was easier than that of Ni in sulfate-chloride bath, the cathode polarization degrees and overpotential of electrodeposition Ni–Mo alloys films both decreased with the increase of the temperature, and the electrochemical process was controlled by electrochemical reaction when the temperature was from 20 °C to 40 °C. The cathode polarization degrees and overpotential of electrodeposition Ni–Mo alloys films both increased with the increase of the bath pH, and the electrodeposition process was controlled by electrochemical reaction and diffusion when the pH was more than 4.0 but it only was controlled by electrochemical reaction when the pH was less than 4.0. The cathode polarization degrees and overpotential of electrodeposition Ni–Mo alloys films both increased with the increase of the concentration of Na2MoO4 · 2H2O, and the electrochemical process was controlled by electrochemical reaction.
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Keywords: CYCLIC VOLTAMMETRY; ELECTROCHEMICAL PROPERTIES; HYDROGEN EVOLUTION; NI–MO ALLOYS FILMS

Document Type: Research Article

Publication date: 01 March 2014

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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