Stress corrosion cracking of 316 SS and Incoloy-800 in high temperature aqueous containing sulfate and chloride
- Institute of Atomic Energy, Beijing (China)
The stress corrosion cracking (SCC) susceptibility of 316 stainless steel (SS) which was welded for primary pipe and Incoloy-800 (shotpeening) for steam generator (SG) tube have been investigated by means of a slow strain rate test (SSRT) at a strain rate of 4.2 x 10{sup {minus}6} /s. Tests were conducted at 315{degrees}C for 316 SS and 270{degrees}C for In-800 in the oxygenated simulated resin intrusion environment (acidic sulfate). Tests of the effect of combination of SO{sub 4}{sup {minus}2} and Cl{sup {minus}} on SCC of Incoloy-800 were also carried out. The results indicate that Incoloy-800 is unsusceptible to SCC either in the environment with SO{sub 4}{sup {minus}2} (from a few ppm to 1000 ppm, pH 3 {approximately} 4) or in the environment of combination of SO{sub 4}{sup {minus}2} (1000 ppm) and Cl{sup {minus}} (from 2 to 1000 ppm). The 316 NG SS is susceptible to transgranular stress corrosion cracking (TGSCC) in the resin intrusion environment with SO{sub 4}{sup {minus}2} in high temperature water.
- OSTI ID:
- 48055
- Report Number(s):
- CONF-910808--
- Country of Publication:
- United States
- Language:
- English
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