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RESEARCH PRODUCT
Effect of surface finishing on the oxidation behaviour of a ferritic stainless steel
Olivier HeintzSébastien ChevalierMichel VilasiPauline GirardonM. R. Ardigo-besnardFrédéric HerbstRémi ChassagnonI. Popasubject
010302 applied physicsMaterials scienceHydrogenMetallurgyGeneral Physics and AstronomyPolishingchemistry.chemical_element02 engineering and technologySurfaces and InterfacesGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter PhysicsMicrostructure01 natural sciencesElectron spectroscopySurfaces Coatings and FilmsCorrosionX-ray photoelectron spectroscopychemistryResidual stress0103 physical sciences0210 nano-technologySurface finishingdescription
Abstract The corrosion behaviour and the oxidation mechanism of a ferritic stainless steel, K41X (AISI 441), were evaluated at 800 °C in water vapour hydrogen enriched atmosphere. Mirror polished samples were compared to as-rolled K41X material. Two different oxidation behaviours were observed depending on the surface finishing: a protective double (Cr,Mn) 3 O 4 /Cr 2 O 3 scale formed on the polished samples whereas external Fe 3 O 4 and (Cr,Fe) 2 O 3 oxides grew on the raw steel. Moreover, isotopic marker experiments combined with SIMS analyses revealed different growth mechanisms. The influence of surface finishing on the corrosion products and growth mechanisms was apprehended by means of X-ray photoelectron spectroscopy (XPS) and residual stress analyses using XRD at the sample surfaces before ageing.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-08-01 | Applied Surface Science |