Differences in corrosion behavior of ferritic and austenitic stainless steels

Journal Article · Thu Dec 01 00:00:00 EST 1994 · Corrosion (Houston); (United States)

DOI:https://doi.org/10.5006/1.3293487· OSTI ID:6672699

Ujiro, T; Yoshioka, K ^[1]; Staehle, R W ^[2]

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1. Kawasaki Steel Corp., Chiba (Japan)
2. Univ. of Minnesota, Minneapolis, MN (United States). Corrosion Research Center

Effects of chromium and molybdenum on differences in corrosion behavior of ferritic and austenitic stainless steels (SS) were investigated to clarify the reason for the superior corrosion resistance of high-alloy ferritic SS to austenitic SS. In the region where the corrosion index (Cr + 3xMo [mass%]) exceeded 32 to 35, ferritic SS showed superior pitting and crevice corrosion resistance to austenitic SS. Cr produced different effects on the anodic polarization behavior of ferritic and austenitic SS in solutions with low pH and high concentrations of chloride. The superiority of high-alloy ferritic SS could be explained by this behavior. The present work was undertaken to clarify reasons for the superiority of high-alloy ferritic stainless steels (SS) for seawater applications.

• OSTI ID: 6672699
• Journal Information: Corrosion (Houston); (United States), Vol. 50:12; ISSN 0010-9312
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
AUSTENITIC STEELS
CORROSION RESISTANCE
CHROMIUM
METALLURGICAL EFFECTS
FERRITIC STEELS
MOLYBDENUM
SEAWATER
CORROSIVE EFFECTS
CREVICE CORROSION
PITTING CORROSION
ALLOYS
CHEMICAL REACTIONS
CORROSION
ELEMENTS
HYDROGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
METALS
OXYGEN COMPOUNDS
STEELS
TRANSITION ELEMENTS
WATER
360105* - Metals & Alloys- Corrosion & Erosion
423000 - Engineering- Marine Engineering- (1980-)