Corrosion inhibition in 2.0 M sulfuric acid solutions of high strength maraging steel by aminophenyl tetrazole as a corrosion inhibitor
Corrosion inhibition in 2.0 M sulfuric acid solutions of high strength maraging steel by aminophenyl tetrazole as a corrosion inhibitor
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DOI：
10.1016/j.apsusc.2013.11.110
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发表时间：
2014-02-15
影响因子：
6.7
通讯作者：
Sherif, El-Sayed M.
中科院分区：
文献类型：
--
作者：
Sherif, El-Sayed M.
研究了高强度马氏体时效钢在2.0M浓硫酸溶液中浸泡不同时间后的腐蚀行为。研究了5-（3-氨基苯基）-四氮唑（APTA）对钢的缓蚀作用。研究已经进行了使用电化学阻抗谱（EIS），动电位极化和扫描电子显微镜（SEM）沿着与能量色散X射线分析仪（EDX）的调查。电化学阻抗谱表明，试样的腐蚀和极化电阻随试样浸泡时间的延长而减小，随APTA的存在和浓度的增加而增大。极化数据与EIS测量结果一致，表明浸泡时间的增加通过增加其腐蚀电流和腐蚀速率以及降低其极化电阻来增加钢的腐蚀。APTA的加入和浓度的增加降低了腐蚀电流和腐蚀速率，提高了极化电阻，从而降低了钢的腐蚀。SEM和EDX研究证实，APTA分子在2.0M H_2SO_4溶液中对马氏体时效钢的缓蚀作用是通过吸附在钢的表面，保护钢的表面不被溶解而实现的。(C)2013爱思唯尔有限公司版权所有。
The corrosion of high strength maraging steel after varied immersion times in concentrated solution, 2.0 M, of sulfuric acid has been investigated. The work was also extended to study the effect of 5-(3-aminophenyl)-tetrazole (APTA) on the inhibition of the steel corrosion. The study has been carried out using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and scanning electron microscope (SEM) along with energy dispersive X-ray analyzer (EDX) investigations. EIS spectra showed that the corrosion and polarization resistances decrease with increasing the immersion time of the steel before measurement and increase in the presence of APTA and the increase of its concentration. Polarization data agreed with the EIS measurements and indicated that the increase of immersion time increases the corrosion of steel by increasing its corrosion current and corrosion rate and lowering its polarization resistance. On the other hand, the addition of APTA and the increase of its concentration minimized the corrosion of steel through decreasing the corrosion current and corrosion rate and increasing the polarization resistance at all exposure test periods. SEM and EDX investigations confirmed that the inhibition of the maraging steel in the 2.0 M H(2)SO(4)solutions is achieved via the adsorption of the APTA molecules onto the steel protecting its surface from being dissolved easily. (C) 2013 Elsevier B.V. All rights reserved.