Intergranular stress corrosion cracking of sensitized type 304 stainless steel in sodium sulfate at approximately 100 C

Journal Article · Thu Apr 01 04:00:00 EST 1993 · Corrosion (Houston); (United States)

DOI:https://doi.org/10.5006/1.3316056· OSTI ID:6213953

Tanno, K; Yashiro, H; Kumagai, N ^[1]; Kawamura, Y ^[2]; Umegai, K ^[3]

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1. Iwate Univ., Morioka (Japan)
2. Iwate Prefectural Government, Morioka (Japan)
3. Nippon Electric Co., Ltd., Kanagawa (Japan)

The susceptibility of sensitized type 304 (UNS S30400) stainless steel to intergranular stress corrosion cracking (IGSCC) was studied in constant load tests and slow strain rate tests using flat tensile specimens in 0.01 M Na[sub 2]SO[sub 4] at 50 to 125 C. At 125 C, IGSCC susceptibility was prominent in the middle of the passive range and the critical potential for IGSCC (E[sub crit]) was close to the passivation potential, which was consistent with previous results at 150 C. At 100 and 75 C, however, IGSCC was observed in the transition potential range from the active to the passive state. Despite the lack of IGSCC in the gauge section in the potential range above the passive state, crevice corrosion generated around the pinhole caused failure of the specimen at 100 C. In the corresponding potential range below 75 C, no failure was obtained. The cracking behavior is discussed mechanistically in terms of the nature of films, dissolution, hydrolysis, and repassivation of the metal.

• OSTI ID: 6213953
• Journal Information: Corrosion (Houston); (United States), Journal Name: Corrosion (Houston); (United States) Vol. 49:4; ISSN 0010-9312; ISSN CORRAK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALKALI METAL COMPOUNDS
ALLOYS
AQUEOUS SOLUTIONS
AUSTENITIC STEELS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION
CORROSION RESISTANT ALLOYS
CRACKS
CREVICE CORROSION
DECOMPOSITION
DISPERSIONS
DISSOLUTION
FAILURES
FILMS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
HYDROLYSIS
INTERGRANULAR CORROSION
IRON ALLOYS
IRON BASE ALLOYS
LYSIS
MATERIALS
MATERIALS TESTING
MIXTURES
NICKEL ALLOYS
OXYGEN COMPOUNDS
PASSIVATION
SODIUM COMPOUNDS
SODIUM SULFATES
SOLUTIONS
SOLVOLYSIS
STAINLESS STEEL-304
STAINLESS STEELS
STEEL-CR19NI10
STEELS
STRAIN RATE
STRESS CORROSION
SULFATES
SULFUR COMPOUNDS
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TESTING