Print Email Facebook Twitter Role of Grain Size and Recrystallization Texture in the Corrosion Behavior of Pure Iron in Acidic Medium Title Role of Grain Size and Recrystallization Texture in the Corrosion Behavior of Pure Iron in Acidic Medium Author Kar, S. (Student TU Delft) Yilmaz, A. (TU Delft Team Yaiza Gonzalez Garcia) Traka, K. (TU Delft Team Maria Santofimia Navarro) Sietsma, J. (TU Delft Team Kevin Rossi) Gonzalez Garcia, Y. (TU Delft Team Yaiza Gonzalez Garcia) Date 2023 Abstract This work investigates the role of grain size and recrystallization texture in the corrosion behavior of pure iron in 0.1 M sulfuric acid solution. Annealing heat treatment was applied to obtain samples with different average grain sizes (26, 53 and 87 µm). Optical microscopy, X-ray diffraction and electron backscatter diffraction techniques were used to characterize the microstructure. The EBSD data analysis showed ferrite phase with no inclusions and very low geometrically necessary dislocation density, indicating strain-free grains constituting all samples. The crystallographic texture analysis of the samples revealed that the 26 µm grain size sample had a high volume fraction of {111} oriented grains parallel to the sample surface, while other samples exhibited nearly random crystallographic texture. The electrochemical results from potentiodynamic polarization and electrochemical impedance spectroscopy showed a decrease in corrosion resistance from 87 µm to 53 µm grain size sample and then an increase for the 26 µm grain size sample. This increase was attributed to the dominant effect of recrystallization texture on the corrosion behavior of the sample. The cathodic hydrogen evolution reaction kinetics was found to play a decisive role in the corrosion behavior of iron. Subject grain sizecrystallographic textureironcorrosionhydrogen evolution reactionEISEBSD To reference this document use: http://resolver.tudelft.nl/uuid:2a922c63-48af-44b9-b49f-4f816bc0b950 DOI https://doi.org/10.3390/met13020388 ISSN 2075-4701 Source Metals, 13 (2) Part of collection Institutional Repository Document type journal article Rights © 2023 S. Kar, A. Yilmaz, K. Traka, J. Sietsma, Y. Gonzalez Garcia Files PDF metals_13_00388.pdf 20.65 MB Close viewer /islandora/object/uuid:2a922c63-48af-44b9-b49f-4f816bc0b950/datastream/OBJ/view