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| Effect of Cl- on Electrochemical Behavior of Pb-0.1?-1.5%Sn Anode in Zinc Sulfate Solution |
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Received:September 05, 2016
Revised:September 14, 2016
Accepted:September 18, 2016
Published Online:December 21, 2016
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| DOI：doi：10.3969/j.issn.1007-7545.2017.01.003 |
| KeyWord:weight-loss method; oxygen evolution overpotential; self-corrosion current; impedance |
| Author | Institution |
| zhanghongli |
贵州大学 |
| suxiangdong |
贵州理工学院 |
| LI Yong |
贵州省过程工业技术研究中心 |
| LIN Qi |
贵州省过程工业技术研究中心 |
| DING Yuan-fa |
贵州省过程工业技术研究中心 |
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| Abstract: |
| Oxygen and corrosion behavior of Pb-0.1?-1.5%Sn anode under different concentrations of Cl- were studied by weight-loss method, galvanostatic polarization, EIS, CV, and CP. The results show that one more oxidation peak (Cl-→Cl2) emerged upon introduction of Cl- in electrolytic process. With increase of Cl-, oxygen evolution potential, self-corrosion current, and corrosion rate first rise then drop in Pb-0.1?-1.5%Sn anode. Surface of Pb-0.1?-1.5%Sn anode is mainly composed of PbO2, PbSO4 and PbO?PbSO4 after galvanostatic polarizating for 12 h. PbO?PbSO4 of Pb-0.1?-1.5%Sn anode under condition of galvanostatic polarization is effectively suppressed by Cl-, which promotes generation of PbO2 and PbSO4, and accelerates corrosion of anode. |
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