Passivation and electrochemical behavior of 316L stainless steel in chlorinated simulated concrete pore solution

被引：189
作者：
Luo, Hong [1 ]
Su, Huaizhi [2 ]
Dong, Chaofang [3 ]
Li, Xiaogang [3 ]
机构：
[1] Hohai Univ, Coll Mech & Mat, Nanjing 210098, Jiangsu, Peoples R China
[2] Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China
[3] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2017年 / 400卷
基金：
中国国家自然科学基金;
关键词：
Stainless steel; Passive film; Concrete; Pitting; NACL AQUEOUS-SOLUTION; CORROSION BEHAVIOR; ALKALINE MEDIA; IMPEDANCE SPECTROSCOPY; PITTING TEMPERATURE; CYCLIC VOLTAMMETRY; REINFORCING STEEL; MILD-STEEL; CHLORIDE; FILMS;
D O I：
10.1016/j.apsusc.2016.12.180
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper, the passivation and electrochemical behavior of 316L stainless steel in chlorinated simulated concrete pore solutions at different pH was evaluated by potentiodynamic measurements, electrochemical impedance spectroscopy. The composition of the passive film and surface morphology were investigated by X-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (SIMS), and scanning electron microscopy, respectively. The results reveal that metastable pitting susceptibility, stable pitting corrosion, and composition of the passive film are influenced by pH value. After long time immersion, a bilayer structure passive film can be formed in this environment. The appearance of molybdates on the outermost surface layer, further enhancing the stability of the passive film. Moreover, the good pitting corrosion resistance of 316L stainless steel in simulated concrete pore solution without carbonated is mainly due to the presence of high Cr/Fe ratio and molybdates ions within the passive film. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：38 / 48
页数：11
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