The effects of thioureido imidazoline and NaNO2 on passivation and pitting corrosion of X70 steel in acidic NaCl solution

被引：46
|
作者：
Zuo, Yu [1 ]
Yang, Li [1 ]
Tan, Yongjun [2 ,3 ]
Wang, Yishan [1 ]
Zhao, Jingmao [1 ]
机构：
[1] Beijing Univ Chem Technol, Beijing Key Lab Electrochem Proc & Technol Mat, Beijing 100029, Peoples R China
[2] Deakin Univ, Inst Frontier Mat, 75 Pigdons Rd, Waurn Ponds, Vic 3125, Australia
[3] Deakin Univ, Sch Engn, 75 Pigdons Rd, Waurn Ponds, Vic 3125, Australia
来源：
CORROSION SCIENCE | 2017年 / 120卷
基金：
中国国家自然科学基金;
关键词：
Carbon steel; Polarization; XPS; Pitting corrosion; Passivation; MILD-STEEL; Q235; STEEL; PIPELINE STEEL; CARBON-STEEL; INHIBITION; CHLORIDE; REDUCTION;
D O I：
10.1016/j.corsci.2016.12.015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of thioureido imidazoline and NaNO2 on passivation and pitting corrosion of X70 steel in acidic NaCl solution were studied. The addition of thioureido imidazoline promoted passivation of the steel in the NaCl-NaNO2 solution, but the pitting potential decreased, which was attributed to the preferential adsorption of residue thiourea monomers in the inhibitor. With longer immersion time, the pitting potential in solution with thioureido imidazoline + NaNO2 increased to the value with only NaNO2. A multi-layer film formed with thiourea rich in inner and imidazoline rich in outer. The compounded inhibition effect of thioureido imidazoline and NaNO2 was discussed. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：99 / 106
页数：8
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