Corrosion inhibitive behavior of 7-hydroxyphenoxazone on mild steel in 1.0 M HCl

被引：13
作者：
Bozorg, M. [1 ]
Farahani, T. Shahrabi [1 ]
Neshati, J. [2 ]
Ziarani, G. Mohammadi [3 ]
Chaghazardi, Z. [1 ]
Gholamzade, P. [3 ]
Ektefa, F. [4 ]
机构：
[1] Tarbiat Modares Univ, Fac Engn, Dept Mat Engn, Tehran 1411713114, Iran
[2] RIPI, Tehran 1485733111, Iran
[3] Alzahra Univ, Dept Chem, Tehran, Iran
[4] Tarbiat Modares Univ, Fac Sci, Dept Chem, Tehran 1411713114, Iran
来源：
RESEARCH ON CHEMICAL INTERMEDIATES | 2015年 / 41卷 / 09期
关键词：
Mild steel; 7-Hydroxyphenoxazone; Polarization; EIS; Quantum chemical calculations; HYDROCHLORIC-ACID SOLUTION; CARBON-STEEL; GREEN; CHLORIDE; EXTRACT;
D O I：
10.1007/s11164-014-1722-6
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The corrosion inhibition of 7-hydroxyphenoxazone was investigated on mild steel (MS) in 1.0 M HCl solution using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM) methods. Results obtained reveal that 7-hydroxyphenoxazone is a good inhibitor for MS in 1.0 M HCl solution and its inhibition efficiency is significantly increased by increasing its concentration. Also, electrochemical measurements showed that 7-hydroxyphenoxazone acts as a mixed-type inhibitor by suppressing the cathodic and anodic processes through a combination of chemical and physical adsorption on the MS surface followed by Langmuir isotherm. Incidentally, enhancement in inhibition efficiency was observed by the addition of KI due to synergism. Further evidence for inhibitive properties of 7-hydroxyphenoxazone was provided by SEM. Quantum chemical calculations were performed to provide illustrative explanation for the inhibition mechanism and adsorption of 7-hydroxyphenoxazone on the MS surface.
引用
收藏
页码：6057 / 6071
页数：15
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