Effect of Thiosulfate on Corrosion Behavior and Passive Films of Duplex Stainless Steel 2205 in Chloride Solutions

被引：6
|
作者：
Zhang, Jiantao [1 ]
Hu, Xiaojun [1 ]
Chou, Kuochih [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2019年 / 14卷 / 10期
基金：
中国国家自然科学基金;
关键词：
duplex stainless steel; Cl-; S2O32-; corrosion behavior; passive film; PITTING CORROSION; ELECTROCHEMICAL-BEHAVIOR; ALLOY; 800; ION; MICROSTRUCTURE; CRACKING;
D O I：
10.20964/2019.10.53
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The effect of S2O32- on the corrosion behavior and passive films of duplex stainless steel 2205 in a Cl--containing environment was investigated by potentiodynamic polarization, electrochemical impedance spectroscopy, Mott-Schottky measurements and XPS composition analysis. The results show that the addition of S2O32- decreased the pitting potential of duplex stainless steel 2205 in Cl--containing solutions. The corrosion resistance of passive films was influenced by the concentration of S2O32- in Cl--containing solutions, but the exhibited n-type and p-type semiconductor characteristics were not affected. The modified stability and the variation in donor and acceptor densities of the passive film with the concentration of S2O32- were detected. The primary components of the passive films on duplex stainless steel 2205 in a Cl--S2O32- solution were Cr-oxides and Fe-oxides or hydroxides with small amounts of Ni and Mo oxides.
引用
收藏
页码：9960 / 9973
页数：14
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