%0 Conference Paper %F Oral %T Influence of the Oxygen Partial Pressure on the High Temperature Corrosion of A 38Ni-34Fe-25Cr Steel in Presence of NaCl Salt %+ Science et Ingénierie des Matériaux et Procédés (SIMaP) %+ IFP Energies nouvelles (IFPEN) %A Couture, L. %A Ropital, Francois %A Grosjean, François %A Kittel, J. %A Parry, V. %A Wouters, Y. %< avec comité de lecture %B International Conference on high temperature corrosion and protection of metals (HTCPM) %C Les Embiez, France %8 2012-05-20 %D 2012 %K Catastrophic oxidation %K active oxidation %K NaCl %K low oxygen partial pressure %Z Chemical Sciences/Material chemistryConference papers %X In biomass gasification process, some molten salts of the feed can generate high temperature corrosions. In this study the chromia-forming austenitic alloy Haynes ® HR-120 was oxidized with a deposit of sodium chloride during 96 hours at 825°C and 900°C. Two different atmospheres were selected; one with a high oxygen partial pressure (Ar/O 2 90/10 %vol.) and one, named syngas, with a low oxygen partial pressure (CO/H 2 /CO 2 45/45/10 %vol.). While at 900°C the behaviour of the alloy in presence of sodium chloride was catastrophic in high oxidizing conditions, the impact of sodium chloride was insignificant in the other atmosphere. Under Ar/O 2 mixture, the catastrophic oxidation was attributed to the setting up of an active oxidation. At 900°C under syngas atmosphere, the protective behaviour of the alloy seems linked to the association of a faster evaporation of the salt and a very low oxygen partial pressure. At 825°C a catastrophic behaviour is observed under syngas atmosphere as the NaCl evaporation rate is much slower. %G English %2 https://ifp.hal.science/hal-02474924/document %2 https://ifp.hal.science/hal-02474924/file/Publication%201%20ID%20104%20Les%20Embiez%202012.pdf %L hal-02474924 %U https://ifp.hal.science/hal-02474924 %~ IFP %~ UGA %~ CNRS %~ UNIV-GRENOBLE1 %~ INPG %~ SIMAP %~ INC-CNRS