6533b86efe1ef96bd12cbd0c

RESEARCH PRODUCT

Influence of the microstructure on the corrosion behaviour of low-carbon martensitic stainless steel after tempering treatment

Frédéric HerbstS. ThiébautSylvain RingevalVincent VignalK. TabalaievRémi ChassagnonC. DessolinOlivier Heintz

subject

Materials scienceScanning electron microscopeGeneral Chemical EngineeringMetallurgyPolishingGeneral ChemistryMartensitic stainless steelengineering.materialMicrostructureCorrosionengineeringPitting corrosionGeneral Materials ScienceTemperingElectron backscatter diffraction

description

Abstract The microstructure of grade X4CrNiMo16.5.1 stainless steel was studied at different scales. The chemical composition of the native passive film formed on the different phases was then determined at the microscale. The degree of homogeneity of the native passive film is discussed. Subsequently, the susceptibility to pitting corrosion of X4CrNiMo16.5.1 was quantified using the electrochemical microcell technique. The nature of precursor sites and the morphology of pits were investigated by combining scanning electron microscopy with Electron BackScatter Diffraction and potentiostatic pulse tests. The role of the microstructure and the cold-worked layer generated by polishing in pitting is discussed.

yearjournalcountryeditionlanguage
2014-08-01Corrosion Science
https://doi.org/10.1016/j.corsci.2014.03.036