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

被引：2
|
作者：
Liu, Qingyou [1 ]
Wang, Luying [1 ,2 ]
Zheng, Kai [3 ]
Li, Heping [1 ]
机构：
[1] Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
[3] Hunan Inst Engn, Xiangtan 411104, Peoples R China
来源：
IONICS | 2015年 / 21卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Chalcopyrite; Calcium fluoride; Polarization curve; EIS; Electrochemical dissolution; AQUEOUS-SOLUTION; MILD-STEEL; IONS; ADSORPTION; CHEMISTRY; OXIDATION; SYSTEMS; COPPER; MEDIA; MINE;
D O I：
10.1007/s11581-014-1215-z
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
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 mu A cm(-2) changed to 0.302 mu A 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.
引用
收藏
页码：749 / 753
页数：5
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