Effect of microstructure on corrosion behavior of superduplex stainless steel at critical environment conditions

Ivan N. Bastos; Sérgio S.M. Tavares; Francis Dalard; Ricardo P. Nogueira

doi:10.1016/j.scriptamat.2007.07.037

Effect of microstructure on corrosion behavior of superduplex stainless steel at critical environment conditions

Ivan N. Bastos, Sérgio S.M. Tavares, Francis Dalard, Ricardo P. Nogueira

Chemical and Petroleum Engineering

Research output: Contribution to journal › Article › peer-review

98 Scopus citations

Abstract

Superduplex stainless steels UNS S32750 with three different microstructures were evaluated in corrosion testing in a 70,000 ppm NaCl brine at 25, 60 and 90 °C. The corrosion behavior is strongly dependent on the microstructure, namely the presence of sigma phase precipitates. Besides the expected decrease of the pitting potential with temperature, results showed that the combined effect of very high chloride concentration and high temperature was deleterious even for the as-received samples, for which no sigma precipitation was found.

Original language	British English
Pages (from-to)	913-916
Number of pages	4
Journal	Scripta Materialia
Volume	57
Issue number	10
DOIs	https://doi.org/10.1016/j.scriptamat.2007.07.037
State	Published - Nov 2007

Keywords

Corrosion behavior
Microstructure
Stainless steel

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10.1016/j.scriptamat.2007.07.037

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abstract = "Superduplex stainless steels UNS S32750 with three different microstructures were evaluated in corrosion testing in a 70,000 ppm NaCl brine at 25, 60 and 90 °C. The corrosion behavior is strongly dependent on the microstructure, namely the presence of sigma phase precipitates. Besides the expected decrease of the pitting potential with temperature, results showed that the combined effect of very high chloride concentration and high temperature was deleterious even for the as-received samples, for which no sigma precipitation was found.",

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AU - Bastos, Ivan N.

AU - Tavares, Sérgio S.M.

AU - Dalard, Francis

AU - Nogueira, Ricardo P.

PY - 2007/11

Y1 - 2007/11

N2 - Superduplex stainless steels UNS S32750 with three different microstructures were evaluated in corrosion testing in a 70,000 ppm NaCl brine at 25, 60 and 90 °C. The corrosion behavior is strongly dependent on the microstructure, namely the presence of sigma phase precipitates. Besides the expected decrease of the pitting potential with temperature, results showed that the combined effect of very high chloride concentration and high temperature was deleterious even for the as-received samples, for which no sigma precipitation was found.

AB - Superduplex stainless steels UNS S32750 with three different microstructures were evaluated in corrosion testing in a 70,000 ppm NaCl brine at 25, 60 and 90 °C. The corrosion behavior is strongly dependent on the microstructure, namely the presence of sigma phase precipitates. Besides the expected decrease of the pitting potential with temperature, results showed that the combined effect of very high chloride concentration and high temperature was deleterious even for the as-received samples, for which no sigma precipitation was found.

KW - Corrosion behavior

KW - Microstructure

KW - Stainless steel

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JF - Scripta Materialia

IS - 10

ER -

Effect of microstructure on corrosion behavior of superduplex stainless steel at critical environment conditions

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Keywords

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