Effects of gamma-ray irradiation and sodium sulfate on the IGSCC susceptibility of sensitized Type 304 stainless steel in high-temperature water

Journal Article · Sun Jul 01 00:00:00 EDT 1990 · Corrosion (Houston); (USA)

DOI:https://doi.org/10.5006/1.3585143· OSTI ID:6072657

Saito, N; Ichikawa, N; Hemmi, Y ^[1]; Sudo, A; Itow, M; Okada, T ^[2]

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1. Nuclear Engineering Lab., Toshiba Co., 4-1 Ukishima-cho Kawasaki-ku, Kawasaki-shi 210 (JP)
2. Isogo Engineering Center, Toshiba Co., 8 Shinsugita-cho Isogo-ku Yokohama-shi 235 (JP)

This paper reports the effects of gamma- ray irradiation and sodium sulfate as an aqueous impurity on the intergranular stress corrosion cracking (IGSCC) susceptibility of sensitized type 304 (UNS{sup (1)} S30400) stainless steel (SS) studied through slow strain rate tests (SSRT) and corrosion potential measurements in high- temperature water that simulated the BWR normal water chemistry (NWC) and hydrogen water chemistry (HWC) conditions. The SSRT results demonstrated that IGSCC was accelerated by gamma-ray irradiation under the NWC condition, while it was suppressed under the HWC condition. These different effects are attributable to the radiation-induced corrosion potential shifts in the opposite directions depending on the water chemistry condition. When the sodium sulfate as injected up to 0.32{mu}S/cm of conductivity, IGSCC was observed even under the HWC condition, but it was suppressed by gamma-ray irradiation.

• OSTI ID: 6072657
• Journal Information: Corrosion (Houston); (USA), Journal Name: Corrosion (Houston); (USA) Vol. 46:7; ISSN 0010-9312; ISSN CORRA
• Country of Publication: United States
• Language: English

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