Effect of Mo2C on electrochemical corrosion behavior of Ti(C,N)-based cermets

被引：3

作者：

董广彪 ^{[1
]}

熊计 ^{[1
]}

杨梅 ^{[2
]}

郭智兴 ^{[1
]}

万维财 ^{[1
]}

易成红 ^{[1
]}

机构：

[1] School of Manufacturing Science and Engineering, Sichuan University

[2] College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology

来源：

Journal of Central South University | 2013年 / 20卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Ti(C; N)-based cermets; Mo2C; electrochemical corrosion;

D O I：

暂无

中图分类号：

TG172 [各种类型的金属腐蚀];

学科分类号：

080503 ;

摘要：

The electrochemical corrosion behavior of Ti(C,N)-based cermets with different Mo2C additions was investigated in freely aerated 10% H2SO4 and potentiodynamic polarization of all the materials was conducted from -0.5 to 1.5 V. There are two passive regions for all polarization curves. The first should be attributed to passive film formation due to Ti(C,N), while the second may be due to the presence of Ni. Corrosion current density increases with Mo2C content increasing, from 2.06×10-3 to 6.70×10-3 mA/cm2 . It is indicated that the corrosion resistance of Ti(C,N)-based cermets decreases with the increase of Mo2C addition. A skeleton of Ti(C,N) gains is observed after dissolution of Ni. The inner rim of cermets, rich in Mo2C, is corroded along with Ni binder and is more serious with the increase of Mo2C content. The secondary carbide Mo2C can be oxidized and dissolved in sulphuric acid.

引用

页码：851 / 858

页数：8

共 11 条

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