Cracking characteristics of alloy 690 in thiosulfate containing chloride solution

Conference · Thu Jul 01 04:00:00 EDT 1999

OSTI ID:20002548

Huang, H H; Tsai, W T

The cracking characteristics of Alloy 690 in deaerated 1wt% NaCl solution with different Na{sub 2}S{sub 2}O{sub 2} 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 x 10{sup {minus}6} s{sup {minus}1}. The results showed that the ultimate tensile strength and the ductility increased with increasing the concentration of Na{sub 2}S{sub 2}O{sub 3} at the same anodic potential, but decreased with increasing potential at a fixed concentration of Na{sub 2}S{sub 2}O{sub 3}. Pitting corrosion could occur on Alloy 690 in 1wt% NaCl solution with the concentration of Na{sub 2}S{sub 2}O{sub 3} {le} 0.1 M, depending on the potential. The susceptibilities of Alloy 690 to pitting corrosion and environmentally-assisted cracking in 1wt% NaCl solution were inhibited with the concentration of Na{sub 2}S{sub 2}O{sub 3} {ge} 0.2M, regardless of the potential.

• Research Organization: National Cheng Kung Univ., Tainan (TW)
• OSTI ID: 20002548
• Report Number(s): CONF-990401--
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
CRACK PROPAGATION
INCONEL 690
PITTING CORROSION
PWR TYPE REACTORS
REACTOR MATERIALS
SODIUM CHLORIDES
THIOSULFATES
WATER CHEMISTRY