Chockalingam, S.C. and Prabhakarrethinaraj, J. and Kulandaisamy, S. and Visvanathan, S. (1996) Performance characteristics of different anode systems in EMD deposition. Bulletin of Electrochemistry, 12 (5-6). pp. 329-332. ISSN 0256-1654

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A comparison has been made of the behaviour of variety of pretreated/activated anodes, viz, Ti, expanded Ti, Ti/RuO2-TiO2, Ti/MnO2 during deposition of EMD from sulphate and chloride electrolyte and compared with that of conventional ones, ie, graphite, bare Ti and platinum with special refernce to energy consumption and cell voltage. It is found that cell voltage increases with increase in sulphuric acid concentration in the bath, indicating the passivation of substrate. Ti/RuO2-TiO2 anode exibits a lower voltage than bare Ti or Ti/MnO2 due to lower contact drop between the deposit and the substrate. The employment of expanded Ti/MnO2 exibits a cell voltage comparable to that of Ti/RuO2-TiO2. In chloride electrolytes, in general Ti/RuO2-TiO2 behaves similar to Ti/MnO2 except that it exibits a lower cell voltage by about 400-500mV. Smooth platinum performs poorly due to lower overpotential for chlorine evolution. Chemical manganese dioxide coated anode is more attractive for employement as anode for MnO2 deposition either from electrolyte.

Item Type: Article
Uncontrolled Keywords: Anode materials; EMD deposition and manganese dioxide
Subjects: Electrohydrometallurgy
Depositing User: ttbdar CECRI
Date Deposited: 25 May 2012 09:17
Last Modified: 25 May 2012 09:17

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