2026-06-29T07:23:07Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/722142023-08-25T16:37:27Zcom_20.500.14352_14col_20.500.14352_15

Comparison of 2D and 3D Plasma Electrolytic Oxidation (PEO)-Based Coating Porosity Data Obtained by X-ray Tomography Rendering and a Classical Metallographic Approach Karlova, Polina Serdechnova, Maria Blawert, Carsten Lu, Xiaopeng Mohedano Sánchez, Marta Tolnai, Domonkos Zeller-Plumhoff, Berit Zheludkevich, Mikhail 66.0 plasma electrolytic oxidation pores tomography Ingeniería química 3303 Ingeniería y Tecnología Químicas In this work, the porosity of plasma electrolytic oxidation (PEO)-based coatings on Aland Mg-based substrates was studied by two imaging techniques—namely, SEM and computer microtomography. Two approaches for porosity determination were chosen; relatively simple and fast SEM surface and cross-sectional imaging was compared with X-ray micro computed tomography (microCT) rendering. Differences between 2D and 3D porosity were demonstrated and explained. A more compact PEO coating was found on the Al substrate, with a lower porosity compared to Mg substrates under the same processing parameters. Furthermore, huge pore clusters were detected with microCT. Overall, 2D surface porosity calculations did not show sufficient accuracy for them to become the recommended method for the exact evaluation of the porosity of PEO coatings; microCT is a more appropriate method for porosity evaluation compared to SEM imaging. Moreover, the advantage of 3D microCT images clearly lies in the detection of closed and open porosity, which are important for coating properties. PETRAIII (DESY, Hamburg, Germany) Depto. de Ingeniería Química y de Materiales Fac. de Ciencias Químicas TRUE pub 2023-06-22T11:12:53Z 2023-06-22T11:12:53Z 2022 journal article https://hdl.handle.net/20.500.14352/72214 1996-1944 10.3390/ma15186315 eng proposal I-20130105 Atribución 3.0 España https://creativecommons.org/licenses/by/3.0/es/ open access application/pdf MDPI AG