Evaluation of corrosion behaviour in a 317L stainless steel strip welding using scanning Kelvin probe force microscopy / N. Sathirachinda in Materials and corrosion, Vol. 62 N° 12 (Décembre 2011)  

Public ISBD [article]  inMaterials and corrosion > Vol. 62 N° 12 (Décembre 2011) . - pp. 1092–1099 Titre : Evaluation of corrosion behaviour in a 317L stainless steel strip welding using scanning Kelvin probe force microscopy Type de document : texte imprimé Auteurs : N. Sathirachinda, Auteur ; S. Wessman, Auteur ; R. Pettersson, Auteur Année de publication : 2012 Article en page(s) : pp. 1092–1099 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Stainless steel Strip welding Scanning Kelvin probe force microscopy Volta potential Uniform corrosion Pitting Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Scanning Kelvin probe force microscopy and magnetic force microscopy have been used in combination with SEM/EDS and immersion tests to study a 317L electroslag strip weld which contains austenite and interdendritic ferrite and sigma phase. The individual phases can easily be recognized from the compositional contrast, magnetic pattern and Volta potential variation. Austenite, which is paramagnetic, exhibits the highest Volta potential followed by non-magnetic sigma phase and ferromagnetic ferrite, respectively. Corrosion testing in acidic chloride solutions indicates that the Volta potential measured in air can be related to the tendency to uniform corrosion, while pitting corrosion shows different dependence. In both cases ferrite and sigma phase behaved in a similar manner, indicating that there was no specific detrimental effect of sigma phase on corrosion properties in this material. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005647/abstract [article] Evaluation of corrosion behaviour in a 317L stainless steel strip welding using scanning Kelvin probe force microscopy [texte imprimé] / N. Sathirachinda, Auteur ; S. Wessman, Auteur ; R. Pettersson, Auteur . - 2012 . - pp. 1092–1099. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 12 (Décembre 2011) . - pp. 1092–1099 Mots-clés : Stainless steel Strip welding Scanning Kelvin probe force microscopy Volta potential Uniform corrosion Pitting Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Scanning Kelvin probe force microscopy and magnetic force microscopy have been used in combination with SEM/EDS and immersion tests to study a 317L electroslag strip weld which contains austenite and interdendritic ferrite and sigma phase. The individual phases can easily be recognized from the compositional contrast, magnetic pattern and Volta potential variation. Austenite, which is paramagnetic, exhibits the highest Volta potential followed by non-magnetic sigma phase and ferromagnetic ferrite, respectively. Corrosion testing in acidic chloride solutions indicates that the Volta potential measured in air can be related to the tendency to uniform corrosion, while pitting corrosion shows different dependence. In both cases ferrite and sigma phase behaved in a similar manner, indicating that there was no specific detrimental effect of sigma phase on corrosion properties in this material. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005647/abstract

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