Nippon Tungusten Review

HOME > Technology > Nippon Tungusten Review > 2000 Volume 32

2000  Volume 32 

Corrosion behavior of TiCx Phase of Sintered Ti-Mo-TiC Alloy in Acid Solutions
Kenji NAKAHARA, Shigeya SAKAGUCHI, Yasunori HAYASHI *)
*) Dept. Material Science and Engineering, Fac. Eng., Kyushu University
Key words sintered Ti-Mo-TiC alloy, TiC, corrosion resistance, HCl, NaCl, NaOH


The corrosion behavior of TiC phase in Ti-20mass%Mo-33mass%TiC alloy (TM-2) and TiCx (X=0.55,0.75,1.0) compounds prepared through P/M technology was studied by immersion tests and electrochemical measurements. The immersion tests in 35%HCl and 3%NaCl solutions showed that the TiC phase in TM-2 and TiCx had excellent corrosion resistance in these solutions. The corrosion rates of TM-2 and TiCx in 5%HNO3 solution were over 10 times higher than those of 35%HCl solution because of the dissolution of TiC phase. From the potentiodynamic polarization curves, it was concluded that the dissolution reaction of the TiC phase in TM-2 and TiCx in 5%HNO3 solution included not only an electrochemical reaction, but also a chemical decomposition. The main corrosion of TM-2 was due to the dissolution of β-Ti phase in 35%HCl and 3%NaCl solutions, and the dissolution of TiC phase in 5%HNO3 solution, respectively.
<< Prev  | TOP | 1 | 2 | 3 | 4 | 5 |


  • TEL +81-942-50-0053 / FAX +81-942-50-0054
Nippon Tungsten Co., Ltd.
2-8, Minoshima 1-chome, Hakata-ku, Fukuoka, 812-8538 Japan
Phone TEL +81-942-50-0053 / FAX +81-942-50-0054
Copyright(C) 2006 Nippon Tungsten Co., Ltd. All right reserved.
Inquiryform Contact by phone & fax