The influence of calcium fluoride on the electrochemical dissolution of chalcopyrite in sulfuric acid solution

被引：0
|
作者：
Qingyou Liu
Luying Wang
Kai Zheng
Heping Li
机构：
[1] Chinese Academy of Sciences,Institute of Geochemistry
[2] University of Chinese Academy of Sciences,undefined
[3] Hunan Institute of Engineering,undefined
来源：
Ionics | 2015年 / 21卷
关键词：
Chalcopyrite; Calcium fluoride; Polarization curve; EIS; Electrochemical dissolution;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The influence of calcium fluoride on the electrochemical dissolution of chalcopyrite at pH 2 was investigated. Experimental results show, when CaF2 concentration from 0 increased to 10 mg/L, chalcopyrite corrosion current density from 0.316 μA cm−2 changed to 0.302 μA cm−2, the CaF2 inhibition efficiency is 4.43 % and up to 15.19 % when CaF2 is saturated; electrochemical impedance spectroscopy (EIS) reveals that it is the increase of the charge transfer resistance at the double layer lead to CaF2 restrain chalcopyrite corrosion; and the cause come from copper fluorinated complex formed and are absorbed on the electrode surface.
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页码：749 / 753
页数：4
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