自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 11    No. 3    September 2004

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Corrosive electrochemistry of jamesonite by cyclic voltammetry
YU Run-lan(余润兰)1,2,HU Yue-hua(胡岳华)1,QIU Guan-zhou(邱冠周) 1, QIN Wen-qing(覃文庆) 1

1.School of Resources Processing and Bioengineering, Central South University, Changsha 410083,China;
2.Department of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008,China

Abstract:The corrosive electrochemistry of jamesonite was studied by cyclic voltammetry. Every peak in voltammograms was identified through thermodynamic calculation. The results show an irreversible electrode process by the strong adsorption of oxidation elemental sulfur on jamesonite. A deficient-metal and sulfur-rich compound is formed under the potential of 80 mV at pH6.86. The passive action by elemental sulfur occurs from 80 to 470 mV and S2O2-3, SO2-4are produced at potential over 470 mV. The anodic peak producing SO2-4is inhibited due to the deposition of PbSO4at higher potential in Na2SO4solution. The corrosive action of jamesonite becomes strong and the redox characterization similar to PbS, FeS and Sb2S3appears at pH 9.18.

 

Key words: jamesonite; corrosive electrochemistry; voltammetry

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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