The inhibition effect of tannic acid on mild steel corrosion in seawater wet/dry cyclic conditions

被引：114
|
作者：
Qian, Bei [1 ,2 ]
Hou, Baorong [1 ]
Zheng, Meng [1 ]
机构：
[1] Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CORROSION SCIENCE | 2013年 / 72卷
基金：
“十二五”国家科技支撑计划重点项目”;
关键词：
Mild steel; EIS; SEM; XRD; Neutral inhibition; WET-DRY CONDITIONS; RUSTED STEEL; CARBON-STEEL; HYDROCHLORIC-ACID; PHOSPHORIC-ACID; LEAVES EXTRACT; ELECTROCHEMICAL IMPEDANCE; CHLORIDE SOLUTIONS; MANGROVE TANNINS; GALVANIZED STEEL;
D O I：
10.1016/j.corsci.2013.01.040
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The inhibition effect of tannic acid on mild steel corrosion in seawater wet/dry cyclic conditions was studied by weight loss and electrochemical methods. Result of the polarisation curves shows that corrosion current density decreases from 47.85 mu A cm(-2) to 6.67 mu A cm(-2) after tannic acid is added; charge transfer resistance remains stable in the electrochemical impedance spectra. Scanning electron microscopy, X-ray diffraction, and Fourier transform infrared reflection are performed to study the corrosion inhibition. The inhibition effect of the compound is attributed to ferric tannate film formation on the steel surface, which is relatively stable during wet/dry cycles. (C) 2013 Elsevier Ltd. All rights reserved.
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页码：1 / 9
页数：9
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