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.

引用

页码：59 / 64

页数：5

共 26 条

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