Evaluation of corrosion resistance of WC-Co based alloys in H2SO4

被引：2
|
作者：
Sunada, Satoshi [1 ]
Hosoda, Yukihiro [1 ]
Yamamoto, Tsutornu [2 ]
Majima, Kazuhiko [1 ]
机构：
[1] Toyama Univ, Grad Sch Sci & Engn, Toyama 9308555, Japan
[2] DIJET INDUSTRIAL CO LTD, Hirano ku, Osaka, 5470002, Japan
来源：
PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3 | 2007年 / 561-565卷
关键词：
cemented carbide; polarization curve measurement; electrochemical impedance spectroscopy; preferential dissolution of Co;
D O I：
10.4028/www.scientific.net/MSF.561-565.2147
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Three cemented carbide specimens, i.e., WC-Co (Sample A), WC-Cr3C2-Co (Sample B) and WC-beta t-Co (Sample C) in which P indicates (Ti,W,Ta,Nb)C, are prepared by liquid phase sintering, and their corrosion behavior has been investigated by the electrochemical methods. The similar activation, passive state and over passive state regions as SUS304 stainless steel during the polarization test, and the preferential dissolution of Co were observed for all of the three specimens mentioned above. Both Cr3C2 and beta t improved the corrosion resistance of WC-Co alloy, in which the effect of the former was better than that of the latter. Sample B also showed the best corrosion resistance in all the samples for the electrochemical impedance spectroscopy (EIS) test.
引用
收藏
页码：2147 / +
页数：2
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