New criteria for characterization of pitting corrosion of duplex stainless steels at the microscale

• Autorzy: Delrue O. , Vignal V. , Peultier J. , Oltra R.
• Języki publikacji: EN

Abstrakty

EN

In this work, the electrochemical microcel technique bas been coupled with a Peltier heating stage to study the local electro-chemical behaviour of both phases of duplex stainless steels (UNS 31803 and UNS S32304) in 1.7M NaCl (pH=3) at 25°C and 80°C. The results (anodic and cathodic current densities, corrosion potential, pitting sites...) have been analysed consider-ing the microstructure and the mechanical state (determined by thermo-mechanical model) under the microcapillary. The results show a relationship between the corrosion potential and the stress distribution at the specimen surface. Moreover, the results derived from the corrosion tests seem to show that the microstructure and/or the mechanical stress have a significant role in pitting corrosion.

Słowa kluczowe

EN

duplex stainless steel; electrochemical microcell; pitting corrosion; mechanical stress

• Wydawca: Politechnika Gdańska
• Czasopismo: Advances in Materials Science
• Rocznik: 2007
• Tom: Vol. 7, nr 2(12)
• Strony: 98--107
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Delrue O.

autor

Vignal V.

autor

Peultier J.

autor

Oltra R.

• LRRS, CNRS-Universite de Bourgogne, BP 47870,21078 Dijon Cedex, France

Bibliografia

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