Effect of the Heat Treatment on the Corrosion Resistance of Duplex Stainless Steels

Journal Article · Wed Aug 15 04:00:00 EDT 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-018-3408-5· OSTI ID:22860362

Pezzato, Luca; Lago, Mattia; Brunelli, Katya; Breda, Marco; Calliari, Irene ^[1]

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1. University of Padova, Department of Industrial Engineering (Italy)

Duplex stainless steels (DSS) are biphasic austenitic-ferritic steels in which the best combination of mechanical and corrosion resistance properties is achieved for an almost equal volume fraction of the phases. In this work, the effect of secondary phases precipitation on the corrosion resistance of four DSS grades (2101, 2304, 2205 and 2507), after isothermal aging in the critical temperature range 750-900 °C, was studied. The corrosion resistance was investigated by potentiodynamic polarization tests in both 0.6 M NaCl solution (pH 7) and in an acid chlorinated solution (pH 3) at room temperature. Moreover, the critical pitting temperature was determined according to ASTM G150. The results showed that secondary phases precipitation mainly influenced the resistance to corrosion of the lean duplex grades.

• OSTI ID: 22860362
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 8 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITIC STEELS
CORROSION RESISTANCE
CRITICAL TEMPERATURE
FERRITIC STEELS
HEAT TREATMENTS
PITTING CORROSION
POLARIZATION
PRECIPITATION
STAINLESS STEELS
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 1000-4000 K