An Electrochemical Study of Pyrite Oxidation in 0.1 M Sulfuric Acid at High Temperature and High Pressure
文献类型:期刊论文
作者 | Sen Lin; Heping Li; Liping Xu; Li Zhou; Can Cui |
刊名 | International Journal of Electrochem Science |
出版日期 | 2017 |
卷号 | 12期号:3页码:1774-1784 |
关键词 | Pyrite Acid Pressure Oxidation Open Circuit Potential Potentiodynamic Polarization Electrochemical Impedance Spectroscopy |
英文摘要 | Open circuit potential, potentiodynamic polarization plots and electrochemical impedance spectroscopy for pyrite in 0.1 M sulfuric acid in the temperature range of 200 to 350 C-o and pressure range of 25 to 40 MPa were measured, with the aid of a self-designed electrochemical measurement set-up which can operate at high temperature and high pressure. Results show that increased temperatures benefit the oxidation of pyrite: at 40 MPa, when the temperature was rised from 200 to 350 C-o, corrosion potential (E-corr) decreased from - 199.83 to - 778.78 mV, corrosion current density (i(corr)) increased from 4.33 to 22.16 mA/ cm(2), polarization resistance (R-p) decreases from 34.11 to 3.85 Omega center dot cm(2), resistance of the passive layer (R(p)l) decreased from 42.16 to 2.48 Omega center dot cm(2). Effects of pressure were also considered, at 300 C-o, when pressure was increased from 25 to 40 MPa, Ecorr decreased from -621.48 to -713.25 mV, however, i(corr) and R-p rarely changed. |
语种 | 英语 |
源URL | [http://ir.gyig.ac.cn/handle/42920512-1/8171] |
专题 | 地球化学研究所_地球内部物质高温高压实验室 |
作者单位 | Key Laboratory for High Temperature & High Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China |
推荐引用方式 GB/T 7714 | Sen Lin;Heping Li;Liping Xu;Li Zhou;Can Cui. An Electrochemical Study of Pyrite Oxidation in 0.1 M Sulfuric Acid at High Temperature and High Pressure[J]. International Journal of Electrochem Science,2017,12(3):1774-1784. |
APA | Sen Lin;Heping Li;Liping Xu;Li Zhou;Can Cui.(2017).An Electrochemical Study of Pyrite Oxidation in 0.1 M Sulfuric Acid at High Temperature and High Pressure.International Journal of Electrochem Science,12(3),1774-1784. |
MLA | Sen Lin;Heping Li;Liping Xu;Li Zhou;Can Cui."An Electrochemical Study of Pyrite Oxidation in 0.1 M Sulfuric Acid at High Temperature and High Pressure".International Journal of Electrochem Science 12.3(2017):1774-1784. |
入库方式: OAI收割
来源:地球化学研究所
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