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Pyrite Passivation by Triethylenetetramine: An Electrochemical Study

机译:三亚乙基四胺对黄铁矿钝化的电化学研究

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摘要

The potential of triethylenetetramine (TETA) to inhibit the oxidation of pyrite in H2SO4 solution had been investigated by using the open-circuit potential (OCP), cyclic voltammetry (CV), potentiodynamic polarization, and electrochemical impedance (EIS), respectively. Experimental results indicate that TETA is an efficient coating agent in preventing the oxidation of pyrite and that the inhibition efficiency is more pronounced with the increase of TETA. The data from potentiodynamic polarization show that the inhibition efficiency (η%) increases from 42.08% to 80.98% with the concentration of TETA increasing from 1% to 5%. These results are consistent with the measurement of EIS (43.09% to 82.55%). The information obtained from potentiodynamic polarization also displays that the TETA is a kind of mixed type inhibitor.
机译:分别通过开路电势(OCP),循环伏安法(CV),电势极化和电化学阻抗(EIS)研究了三亚乙基四胺(TETA)抑制H2SO4溶液中黄铁矿氧化的潜力。实验结果表明,TETA是防止黄铁矿氧化的有效包覆剂,随着TETA的增加,其抑制效果更加明显。电位动力学极化的数据表明,随着TETA的浓度从1%增加到5%,抑制效率(η%)从42.08%增加到80.98%。这些结果与EIS的测量结果一致(43.09%至82.55%)。从动电位极化获得的信息还表明,TETA是一种混合型抑制剂。

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