Print Email Facebook Twitter Properties of Passive Films Formed on Ferrite-Martensite and Ferrite-Pearlite Steel Microstructures Title Properties of Passive Films Formed on Ferrite-Martensite and Ferrite-Pearlite Steel Microstructures Author Yilmaz, A. (TU Delft Team Yaiza Gonzalez Garcia; Netherlands Organisation for Scientific Research (NWO)) Ozkan, C. (Student TU Delft) Sietsma, J. (TU Delft Team Kevin Rossi) Gonzalez Garcia, Y. (TU Delft Team Yaiza Gonzalez Garcia) Date 2021 Abstract The effect of ferrite-pearlite and ferrite-martensite phase combinations on the passive layer properties of low carbon steel is investigated in a 0.1 M NaOH solution. Heat treatments were designed to obtain ferrite-pearlite and ferrite-martensite microstructures with similar ferrite volume fractions. Potentiostatic polarisation and electrochemical impedance spectroscopy (EIS) results demonstrated the lower barrier properties of passive films on ferrite-martensite microstructure compared to the ones formed on ferrite-pearlite microstructure. This was attributed to the higher donor density of the passive layer on ferrite-martensite samples, measured with Mott–Schottky analysis. This behaviour was explained by the complex microstructure morphology of the martensite phase that led to the formation of a more defective passive film Subject HSLA steeldual-phasepassivityEISpolarisationMott–Schottky To reference this document use: http://resolver.tudelft.nl/uuid:f8c5d899-7bbb-4045-9b4e-5b54aed8f186 DOI https://doi.org/10.3390/met11040594 ISSN 2075-4701 Source Metals, 11 (4) Part of collection Institutional Repository Document type journal article Rights © 2021 A. Yilmaz, C. Ozkan, J. Sietsma, Y. Gonzalez Garcia Files PDF metals_11_00594.pdf 1.67 MB Close viewer /islandora/object/uuid:f8c5d899-7bbb-4045-9b4e-5b54aed8f186/datastream/OBJ/view