Documents disponibles écrits par cet auteur

Corrosion of stainless steel grades in molten NaOH/KOH eutectic at 250 °C: AISI304 austenitic and 2205 duplex / B. Bozzini in Materials and corrosion, Vol. 63 N° 11 (Novembre 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 11 (Novembre 2012) . - pp. 967–978 Titre : Corrosion of stainless steel grades in molten NaOH/KOH eutectic at 250 °C: AISI304 austenitic and 2205 duplex Type de document : texte imprimé Auteurs : B. Bozzini, Auteur ; S. Barella, Auteur ; F. Bogani, Auteur Année de publication : 2014 Article en page(s) : pp. 967–978 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Austenitic  stainless  steel;  duplex  stainless  steel;  EIS;  KOH;  molten  alkali;  NaOH Résumé : The present paper focuses on the corrosion of an austenitic (AISI304) and a duplex (2205) stainless steel grade in molten KOH/NaOH 50 w/o eutectic at 250 °C. Experimental activities have been performed consisting in electrochemical measurements (linear sweep voltammetry and electrochemical impedance spectrometry) complemented by metallographic (in-plane and cross-sectional SEM micrography), structural (X-ray diffractometry) and compositional (EDX line-profiles) characterisation of the materials attacked under electrochemically controlled conditions. Electrochemical measurements have shown that AISI304 exhibits a passivating behaviour, characterised by two passivation peaks and a transpassive threshold, while duplex, does not yield a clear indication of passivation. AISI304 was found to fail by intergranular corrosion and to be covered in both passive and transpassive conditions, by an incoherent scale, containing electrolyte species. Duplex samples, instead tends to fail by homogeneous attack and exhibit a range of scale structures, depending on the applied potential. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106386/abstract [article] Corrosion of stainless steel grades in molten NaOH/KOH eutectic at 250 °C: AISI304 austenitic and 2205 duplex [texte imprimé] / B. Bozzini, Auteur ; S. Barella, Auteur ; F. Bogani, Auteur . - 2014 . - pp. 967–978. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 11 (Novembre 2012) . - pp. 967–978 Mots-clés : Austenitic  stainless  steel;  duplex  stainless  steel;  EIS;  KOH;  molten  alkali;  NaOH Résumé : The present paper focuses on the corrosion of an austenitic (AISI304) and a duplex (2205) stainless steel grade in molten KOH/NaOH 50 w/o eutectic at 250 °C. Experimental activities have been performed consisting in electrochemical measurements (linear sweep voltammetry and electrochemical impedance spectrometry) complemented by metallographic (in-plane and cross-sectional SEM micrography), structural (X-ray diffractometry) and compositional (EDX line-profiles) characterisation of the materials attacked under electrochemically controlled conditions. Electrochemical measurements have shown that AISI304 exhibits a passivating behaviour, characterised by two passivation peaks and a transpassive threshold, while duplex, does not yield a clear indication of passivation. AISI304 was found to fail by intergranular corrosion and to be covered in both passive and transpassive conditions, by an incoherent scale, containing electrolyte species. Duplex samples, instead tends to fail by homogeneous attack and exhibit a range of scale structures, depending on the applied potential. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106386/abstract