Effect of Cl- concentration on pitting corrosion property of maraging hardened stainless steel based on pourbaix diagram

被引：1
|
作者：
Zhang X. [1 ]
Zou D. [1 ]
Zhou Y. [1 ]
Na X. [1 ]
Zhang W. [2 ]
Han Y. [3 ]
机构：
[1] School of Metallurgy and Engineering, Xi’an University of Architecture and Technology, Xi’an
[2] State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an
[3] Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun
来源：
Zou, Dening (zoudening@sina.com) | 2018年 / Trans Tech Publications Ltd卷 / 940期
基金：
中国国家自然科学基金;
关键词：
Cl[!sup]-[!/sup] concentration; E-pH diagrams of Fe-Cr-Cl[!sup]-[!/sup]-H[!sub]2[!/sub]O; Maraging hardening stainless steel; Pitting;
D O I：
10.4028/www.scientific.net/MSF.940.59
中图分类号：
学科分类号：
摘要：
The corrosion behavior of maraging hardened stainless steel (MHSS) in different Cl-medium was investigated by thermodynamics simulation and electrochemical experiments. The simulation results show that the thermodynamic stability zone decreases with the increase of the concentration of Cl-. Some of chromium transformed into Cr(OH)2+ and adsorbed on the surface of stainless steel, and others generated Cr2O3 protecting the matrix. Mo reacted with O2 to form MoO42- adsorbed on the surface of the material, which inhibited the destruction of Cl-. The electrochemical experiments indicate that the concentration of Cl- is in the range of 2%-7%. The pitting potential and self-corrosion potential of MHSS decreased linearly with the increase of ion concentration, and the pitting corrosion resistance of MHSS decreased. When the self-corrosion current increases from 1.9888 μA to 2.6524 μA, the corrosion tendency of the material enhances. © 2018 Trans Tech Publications, Switzerland.
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页码：59 / 64
页数：5
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