Critical temperature for crevice corrosion of high-nitrogen stainless steels

Conference · Thu Dec 31 04:00:00 EST 1998

OSTI ID:351811

Russell, J H; Covirro, Jr, B S ^[1]

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1. Dept. of Energy, Albany, OR (United States). Albany Research Center

A relatively simple electrochemical method was used to determine the critical temperatures for crevice corrosion (CCT) of a series of high nitrogen stainless steels in 3.5% NaCl solution and to compare those to critical pitting temperatures (CFT) reported previously. CCTs for several commercial stainless steels were also measured. In most cases, the critical crevice temperature was linearly related to the pitting resistance equivalence, slightly divergent from, and 10 to 30 C lower than the critical pitting temperature. The method is useful in distinguishing the relative localized corrosion resistance of those alloys whose critical pitting temperature was at or above the maximum temperature of the equipment. Evidence for synergy between the molybdenum and nitrogen concentrations was not convincing.

• OSTI ID: 351811
• Report Number(s): CONF-980316--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CORROSION RESISTANCE
CREVICE CORROSION
CRITICAL TEMPERATURE
NITROGEN ADDITIONS
PITTING CORROSION
SODIUM CHLORIDES
STAINLESS STEELS