Corrosion behavior of Ti-Zr based bulk amorphous alloys in NaOH solution
SUO Zhong-yuan1, GONG An-hua2,3,WANG Xin1, JIANG Feng1, ZHANG Zhi-hao1 ,WANG Yi-jian
1.College of Mechanical and Electrical Engineering, Jilin Institute of Chemical Technology, Jilin 132022,Jilin, China 2. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China 3. Rotork Valve Control Technology Shanghai Co., Ltd. Shanghai 201108, China
Abstract：Corrosion behaviors of the Ti35Zr30Be20Cu7.5Co7.5 bulk amorphous alloy in 0.5, 1 , 2 mol/L NaOH solution were studied by potentiodynamic polarization method and variable-temperature weight loss measurement. Moreover, the corrosion behaviors of the Ti35Zr30Be20Cu7.5Co7.5 bulk amorphous alloy and the 304 stainless steel were compared in 0.5, 1, 2 mol/L NaOH solution, respectively. The results of potentiodynamic polarization experiment show that the Ti35Zr30Be20Cu7.5Co7.5 bulk amorphous alloy has excellent corrosion resistance in 0.5, 1 , 2 mol/L NaOH solution and its anodic reaction has a passive character. While increasing the NaOH concentration from 0.5 to 2 mol/L, polarization curve shifts to the left and the corrosion resistance is reduced. The self corrosion potential of the Ti35Zr30Be20Cu7.5Co7.5 bulk amorphous alloy is higher than that of the 304 stainless steel. The corrosion resistance of the amorphous alloy is better compared to the 304 stainless steel with temperature increasing for 293, 313, 333 K in 2 mol/L NaOH solution by weight loss corrosion. Corrosion resistance mechanism of the Ti35Zr30Be20Cu7.5Co7.5 bulk amorphous alloy is discussed, according to the temperature and concentration of NaOH solution properties.
2016, Vol. 23 
