摘要
采用三电极体系,在流动溶液下,改变溶液组分浓度和流速,对黄铁矿和方铅矿组成的原电池腐蚀电流密度和混合电位进行研究,结果表明:Na+离子对原电池反应无明显影响,Fe3+离子能明显加快原电池的腐蚀速度,并且Fe3+浓度越大腐蚀速度越快;溶液流速越大原电池腐蚀速度越快。实验结果对矿山环境污染治理有指导意义。结合混合电位理论和Butler-Volmer方程从理论上对实验结果进行了解释。
In this work a three-electrode system was adopted to investigate the corrosion current density and mixed electrical potential of the galvanic cell made up of pyrite and galena, by changing the solution concentrations and flowing rate. The result showed that changing the solution concentrations of Na^＋ has no influence on the corrosion rate, and Fe^3＋ could accelerate the corrosion rate markedly, and the greater the concentrations of Fe^3＋, the higher the corrosion rate; the faster the flowing rate, the higher the corrosion rate will be. Experimental results are of directive significance in controlling environmental pollution in mining areas. In combination with the theory of mixed potential and the Butler-Volmer equation the authors theoretically explained the experimental results.
出处
《地球与环境》
CAS
CSCD
北大核心
2006年第2期89-94,共6页
Earth and Environment
基金
中国科学院知识创新工程重要方向项目(KZCX3-SW-124)
关键词
黄铁矿
方铅矿
原电池反应
腐蚀电流密度
混合电位
流动体系
pyrite
galena
galvanic interaction
corrosion current density
mixed potential
flowing system
