Susceptibility of low-alloy carbon steel to pitting and stress corrosion cracking in steam generator conditions

Journal Article · Fri Apr 01 04:00:00 EST 1994 · Corrosion (Houston); (United States)

DOI:https://doi.org/10.5006/1.3294335· OSTI ID:7202002

Szklarska-Smialowska, Z; Xia, Z; Rebak, R B ^[1]; Skulte, P ^[2]

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1. Ohio State Univ., Columbus, OH (United States). Fontana Corrosion Center
2. Con-Edison, New York, NY (United States)

The susceptibility of ASTM A302, grade B steel (UNS K12022) to stress corrosion cracking (SCC) and pitting was examined through modeling of different stages of operation of the steam generator in a nuclear power plant. Effects of temperature, dissolved oxygen (DO) content, and direction of loading were studied. The steel was found to be very susceptible to pitting and SCC at all tested temperatures (100 C to 260 C), especially when the DO level was >50 ppb. Pitting and SCC were often associated with the presence of sulfide inclusions. The short transverse direction was more susceptible to SCC than the longitudinal direction. The presence of a well region was not found to enhance susceptibility to cracking or pitting.

• OSTI ID: 7202002
• Journal Information: Corrosion (Houston); (United States), Journal Name: Corrosion (Houston); (United States) Vol. 50:4; ISSN 0010-9312; ISSN CORRAK
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
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36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
BOILERS
CHEMICAL REACTIONS
CORROSION
CORROSION RESISTANT ALLOYS
CRACK PROPAGATION
ENRICHED URANIUM REACTORS
INDIAN POINT-2 REACTOR
IRON ALLOYS
IRON BASE ALLOYS
LOW ALLOY STEELS
MANGANESE ALLOYS
MOLYBDENUM ADDITIONS
MOLYBDENUM ALLOYS
PITTING CORROSION
POWER REACTORS
PWR TYPE REACTORS
REACTORS
STEAM GENERATORS
STEEL-ASTM-A302
STEEL-MNMO
STEELS
STRESS CORROSION
THERMAL REACTORS
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS