© 2024 by the authors. Licensee MDPI, Basel, Switzerland.Agüero, AlinaAudigié, PaulineLorente Sánchez, CristinaGutiérrez del Olmo, MarcosMora, JulioSergio, Rodríguez Catela2026-01-212026-01-212024-09-29Coatings 14(10): 1243https://www.mdpi.com/2079-6412/14/10/1243https://hdl.handle.net/20.500.12666/1642The authors would like to thank all the suppliers of the base materials and acknowledge Mar Juez Lorenzo for her invaluable contribution to the FESEM images of coated A516. The authors also wish to dedicate the work on Mo-coated systems to Michel Pons from SIMaP, France, for initiating this study, providing the free-of-charge samples, and for the invaluable discussion related to this material. Disclaimer/Publisher’s Note: The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content.The present study focused on demonstrating the versatility of the slurry deposition technique to produce aluminide coatings to protect components from high-temperature corrosion in a broad temperature range, from 400 to 1400 °C. This is a simpler and low-cost coating technology used as an alternative to CVD and pack cementation, which also allows the coating of complex geometries and offers improved and simple repairability for a lot of industrial applications, along with avoiding the use of non-hazardous components. Slurry aluminide coatings from a proprietary water-based-Cr6+ free slurry were produced onto four different substrates: A516 carbon steel, 310H AC austenitic steel, Ti6246 Ti-based alloy and TZM, a Mo-based alloy. The resulting coatings were thoroughly characterised by FESEM and XRD, mainly so that the identification of microstructures and appropriate phases was reported for each coating. The importance of surface preparation and heat treatment as key parameters for the coating final microstructures was also evidenced, and how those parameters can be optimised to obtain stable intermetallic phases rich in Al to sustain the formation of a protective Al2O3 oxide scale. These coating systems have applications in diverse industrial environments in which high-temperature corrosion limits the lifetime of the components.engAttribution-NonCommercial-ShareAlike 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-sa/4.0/Slurry aluminide coatingsInterdiffusionCarbon steelsAustenitics steelsTitanium alloysMolybdenum alloysinfo:eu-repo/semantics/article10.3390/coatings141012432079-6412info:eu-repo/semantics/openAccess