| 缓蚀剂阳极脱附的动力学研究 |
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| 引用本文： | 汪的华,江俊伟,卜宪章,甘复兴,邹津耘.缓蚀剂阳极脱附的动力学研究[J].武汉大学学报(理学版),2001,47(2):133-136. |
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| 作者姓名： | 汪的华 江俊伟 卜宪章 甘复兴 邹津耘 |
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| 作者单位： | 武汉大学 化学与分子科学学院, |
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| 基金项目： | 国家自然科学基金(59801007)；金属腐蚀与防护国家重点实验室资助课题 |
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| 摘 要： | 运用极化曲线、微分极化曲线、循环极化和恒电位暂态等方法研究了缓蚀剂阳极脱附的动力学行为，结果表明缓蚀剂阳极脱附存在一个明显的诱导期，具有“S”型的脱附动力学曲线，呈自催化反应特征；外加电位越正，缓蚀剂脱附速度越快，脱附的诱导期越短；覆盖度高的稳定吸附层，脱附电位更正，脱附速度也更快.据此提出了缓蚀剂的阳极脱附是由于阳极极化条件下电极过程吸附态中间产物的竞争吸附使得缓蚀剂发生自加速脱附的新机制.
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| 关 键 词： | 缓蚀剂 阳极脱附 脱附动力学 脱附机制 |
| 文章编号： | 0253-9888(2001)02-0133-04 |
| 修稿时间： | 2000年6月20日 |
A Kinetic Study on the Anodic Desorption
of Interface Corrosion Inhibitor |
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| WANG Di-hua,JIANG Jun-Wei,BU Xian-zhang,GAN Fu-xing,Zou Jin-yun.A Kinetic Study on the Anodic Desorption
of Interface Corrosion Inhibitor[J].JOurnal of Wuhan University:Natural Science Edition,2001,47(2):133-136. |
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| Authors: | WANG Di-hua JIANG Jun-Wei BU Xian-zhang GAN Fu-xing Zou Jin-yun |
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| Abstract: | The kinetics of inhibitor desorption on iron surface were investigated by potentiodynamic, differential polarization curve, cyclic polarization experiment, as well as potential step method. It was found that the anodic desorption exists an incubation time, and the measured kinetic curves of inhibitor desorption are “S” type, showing an autocatalytic process. The desorptin rate is depended on the desorption potential as well as the stability of inhibitor adsorption. The more stable the adsorption of inhibitoris, the more positive the Edes and the faster the desorption rateis. A new desorption mechanism was proposed on the basis of experimental results. According to this mechanism, the anodic desorption of inhibitor is more probably due to the competitive adsorption between inhibitor and intermediate produced in the anodic dissolution process of iron. |
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| Keywords: | corrosion inhibitors anodic desorption desorption kinetics desorption mechanism |
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