Print Email Facebook Twitter Passive Film Properties of Martensitic Steels in Alkaline Environment Title Passive Film Properties of Martensitic Steels in Alkaline Environment: Influence of the Prior Austenite Grain Size Author Yilmaz, A. (TU Delft Team Yaiza Gonzalez Garcia; Material Innovation Institute (M2i); Netherlands Organisation for Scientific Research (NWO)) He, X. (TU Delft Intelligent Vehicles; Material Innovation Institute (M2i)) Pletincx, Sven (Vrije Universiteit Brussel) Hauffman, Tom (Vrije Universiteit Brussel) Sietsma, J. (TU Delft Team Jilt Sietsma) Gonzalez Garcia, Y. (TU Delft Team Yaiza Gonzalez Garcia) Date 2022 Abstract The role of prior austenite grain size (PAGS) on the passive layer properties of martensitic steels is studied. Electron backscatter diffraction analysis shows that PAGS between 5 and 66 µm were obtained after applying different heat treatments. The barrier properties of passive film deteriorate with grain refinement up to 28 µm, attributed to increased donor density and a decrease in the fraction of γ-Fe2O3 in passive films. However, the further refinement of PAGS to 5 µm leads to improvement in the barrier properties due to the changes within the martensite structure. This improvement stems from the increase in γ-Fe2O3 fraction. Subject martensitic steelgrain-sizepassivityelectrochemical impedance spectroscopyMott-Schottky analysisX-ray photoelectron spectroscopy To reference this document use: http://resolver.tudelft.nl/uuid:9f4d6358-9c9c-47ce-9979-c746fb0b60a4 DOI https://doi.org/10.3390/met12020292 ISSN 2075-4701 Source Metals, 12 (2) Part of collection Institutional Repository Document type journal article Rights © 2022 A. Yilmaz, X. He, Sven Pletincx, Tom Hauffman, J. Sietsma, Y. Gonzalez Garcia Files PDF metals_12_00292.pdf 2.41 MB Close viewer /islandora/object/uuid:9f4d6358-9c9c-47ce-9979-c746fb0b60a4/datastream/OBJ/view