硫酸中硫脲影响铁腐蚀行为的机制

中国腐蚀与防护学报

1996, Vol. 16

Issue (1): 53-58

研究报告

本期目录 | 过刊浏览

硫酸中硫脲影响铁腐蚀行为的机制

董俊华;宋光铃;林海潮;曹楚南

中国科学院金属腐蚀与防护研究所

INFLUENCE OF THIOUREA ON CORROSION BEHAVIOR OF IRON IN H_2SO_4 SOLUTION

Dong Junhua;Song Guangling;Lin Haicao;Cao Chunan

全文: PDF(486 KB)

摘要: 用近稳态极化曲线方法和交流阻抗方法研究了铁在硫脲浓度低于０．１ｍｍｏｌ／Ｌ的硫酸溶液中的腐蚀行为，获得了相关的电化学参数。结果表明，在低阳极极化区，铁阳极溶解反应的速率决定步骤是一个亲核加成反应，动力学参数为Ｖ（ＴＵ）＝１，ｂａ≈６０ｍＶ。在阴极区，析氢反应的速率决定步骤是Ｈｅｇｒｏｖｓｋｙ反应，动力学参数为：Ｖ（ＴＵ）＝０．５，Ｖ（Ｈ＋）＝１．５，ｂｃ≈－８２ｍＶ。

Abstract：The corrosion behavior of iron electrode in H2SO4 containing thioures（C 0．1 mmol／L）was investigated with polarization curves and EIS method．Various electrochemical parameters involved were obtained．The results showed that，the rate determining step（r．d．s）for anodic dissolution reaction of iron in low polarization region was a nucleophilic additive reaction,and the corresponding kinetics parameters were VTU=1,ba≈60mV.The r.d.s for its catbodic process was a Heyrovshky Heyrovsky reaction,and the kinetics parameters were：VTU＝－0．5，VH+=1．5，bc≈－82mV．

收稿日期: 1996-02-25

基金资助:国家自然科学基金

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引用本文:

董俊华;宋光铃;林海潮;曹楚南. 硫酸中硫脲影响铁腐蚀行为的机制[J]. 中国腐蚀与防护学报, 1996, 16(1): 53-58.
. INFLUENCE OF THIOUREA ON CORROSION BEHAVIOR OF IRON IN H_2SO_4 SOLUTION. J Chin Soc Corr Pro, 1996, 16(1): 53-58.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1996/V16/I1/53

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