Abstract
The electrochemical oxidation processes and phase formation on binary PbAg and PbCa, and ternary PbAgCa alloys during anodic treatment of the electrodes for conditions in a sulphuric acid electrolyte were investigated. The electrochemical behaviour of lead and its alloys was studied by the cyclic voltammetry method (CVA). X-ray and SEM were used for the phase composition and surface structure analysis. It was established that only the ternary plastically treated PbAg 0.5%-Ca 0.11% alloys reveal similarities to the industrially applied PbAg 1 % anodes. It may be assumed in the case of ternary alloys that the catalytic layer is composed of a dense non-conductive MnO 2 layer of crystals serving as basic sites for oxygen evolution.
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