|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Study of the Effect of the Initial Nucleation Mechanism of Lead Anode Oxidation Film on Internal Stress in Chromic Acid Electrolyte
||Yunkai Wang, Jiangzhong Li
|On-Site Speaker (Planned)
Lead substrate anodes are widely used in the electroplating and electrolytic field. Howerver, with the change of internal stress, the oxide films are gradually generated on the surface of lead anode. In this study, electrochemical nucleation of the oxidation film on Pb anode was analyzed with the change of internal stress. Their structure and stress properties were studied during the oxidation by means of Raman spectra, XRD, SEM. The result showed that the diffraction peaks of Pb were mainly found at the initial oxidation stage. With increasing oxidation time, Pb diffraction peaks were weakened and the diffraction peaks of PbCrO4 and PbO/ PbO2 strengthened remarkably. Raman spectra revealed that Raman peaks of PbCrO4 and PbO/ PbO2 were gained in CrO42- ions electrolyte. the electrochemical nucleation type of Pb anode was first instantaneous and then progressive. The Pb alloy anode had a similar eletrochemical nucleation type, but a lower rate.
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