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oai:docta.ucm.es:20.500.14352/1077132025-03-18T15:33:38Zcom_20.500.14352_14col_20.500.14352_15

Corrosion of magnesium-aluminum alloys with Al-11Si/SiC thermal spray composite coatings in chloride solution Arrabal Durán, Raúl Pardo Gutiérrez Del Cid, Ángel Merino Casals, María Concepción Mohedano Sánchez, Marta Casajus, P. Matykina, Endzhe Depositions of Al-11Si coatings reinforced with 5, 15, and 30 vol.% SiC particles (SiCp) were performed onto AZ31, AZ80, and AZ91D magnesium alloys. The influence of substrate composition and SiCp proportion on the anti-corrosion properties of composite coatings was evaluated using DC and AC electrochemical measurements in 3.5 wt.% NaCl solution at 22 °C. The as-sprayed coatings were permeable to the saline solution, and galvanic corrosion occurred at the substrate/coating interface after immersion in the saline solution for a few hours. The addition of SiCp yielded coatings with higher porosity and less effectiveness against corrosion. The application of a cold-pressing post-treatment produced denser coatings with reduced surface roughness, improved hardness, and superior corrosion resistance. However, galvanic corrosion was observed after several days of immersion because of penetration of the 3.5 wt.% NaCl solution through the remaining pores in the coatings. 2024-08-27T14:50:43Z 2024-08-27T14:50:43Z 2024-08-27T14:50:43Z 2011 journal article https://hdl.handle.net/20.500.14352/107713 1544-1016 10.1007/s11666-010-9574-0 eng The authors are grateful to the MCYT (Spain, Project MAT 2009– 09845–C02–01) and the Community of Madrid (Spain, S2009MAT–1585) for support of this work. Raul Arrabal is grateful to the MICINN (Spain) for financial support via the Ramon y Cajal Programme (RYC–2008–02038). Arrabal, Raul & Pardo, A. & Merino, Maria & Mohedano, Marta & Casajús, P. & Matykina, Endzhe. (2011). Corrosion of Magnesium-Aluminum Alloys with Al-11Si/SiC Thermal Spray Composite Coatings in Chloride Solution. Journal of Thermal Spray Technology. 20. 569-579. 10.1007/s11666-010-9574-0. http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 International Springer Nature