Anodic characteristics and stress corrosion cracking behavior of nickel rich alloys in bicarbonate and buffer solutions

作者：Zadorozne Natalia S^*; Giordano Mabel C; Ares Alicia E; Carranza Ricardo M; Rebak Raul B

来源：Corrosion Science, 2016, 108: 1-10.

DOI：10.1016/j.corsci.2016.02.038

• Nickel
• Polarization
• Stress corrosion

The aim of this work is to investigate which alloying element in C-22 is responsible for the cracking susceptibility of the alloy in bicarbonate and two buffer solutions (tungstate and borate). Six nickel based alloys, with different amount of chromium (Cr) and molybdenum (Mo) were tested using electrochemical methods and slow strain rate tests (SSRT) at 90 degrees C. All Cr containing alloys had transgranular cracking at high anodic potential; however, C-22 containing high Cr and high Mo was the most susceptible alloy to cracking. Bicarbonate was the most aggressive of three tested environments of similar pH.

• 出版日期2016-7