Cracking characteristics of alloy 690 in thiosulfate containing chloride solution

Her Hsiung Huang, Wen Ta Tsai

Research output: Contribution to journalConference articlepeer-review


The cracking characteristics of Alloy 690 in deaerated lwt% NaCl solution with different Na2S2O3 concentrations, namely 0.01, 0.1, 0.2 and 0.5 M, at controlled anodic potentials was investigated by using slow strain rate testing (SSRT) with a strain rate of 1 × 10-6 s-1. The results showed that the ultimate tensile strength and the ductility increased with increasing the concentration of Na2S2O3 at the same anodic potential, but decreased with increasing potential at a fixed concentration of Na2S2O3 Pitting corrosion could occur on Alloy 690 in lwt% NaCl solution with the concentration of Na2S2O3 ≦ 0.1M, depending on the potential. The susceptibilities of Alloy 690 to pitting corrosion and environmentally-assisted cracking in lwt% NaCl solution were inhibited with the concentration of Na2S2O3 ≧ 0.2M, regardless of the potential.

Original languageEnglish
JournalNACE - International Corrosion Conference Series
Publication statusPublished - 1999
EventCorrosion 1999 - San Antonio, United States
Duration: 1999 Apr 251999 Apr 30

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)


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