Electrochemical dissolution and passivation of lead and its alloys in concentrated sulphuric acid solutions

被引：0

作者：

Mateescu, Doina ^{[1
]}

Branzoi, Florina ^{[1
]}

Pilan, Luisa ^{[1
]}

Branzoi, V. ^{[1
]}

机构：

[1] Dept. of Applied Physical Chemistry, Univ. Politehnica of Bucharest, Bucharest, Romania

来源：

UPB Scientific Bulletin, Series B: Chemistry and Materials Science | 2001年 / 63卷 / 03期

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摘要：

Potentiodynamic method has been used to study the electrochemical redox behaviour of Pb/PbSO4 and Pb/PbO2 systems on the lead and its alloys electrodes in aqueous concentrated H2SO4 solutions. The potential sweep of the working electrode, within given potential ranges (-1200 mV to -800 mV and +800 mV to +1600 mV), was intended to simulate the processes taking place at the positive and negative plates of the lead/acid battery during charge/discharge cycling. The anodic and the cathodic polarization behaviour has been investigate under the various conditions by changing the potential region, sweeping rate, concentration of the electrolyte and composition of lead alloys. The characteristics of the polarization curves (i.e., shape and height and potential range in which peaks appear), as well as the values of the kinetic parameters determined from such curves, enable conclusions to be drawn concerning the electrochemical characteristics of the Pb/PbSO4 and Pb/PbO2 systems.

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页码：481 / 492