NEWS4CSP Project – New Coatings Approaches to Protect Metallic Materials From Heat Transfer Fluids
DOI:
https://doi.org/10.52825/solarpaces.v3i.2321Keywords:
Corrosion, Metallic Coatings, Laser Cladding, Molten SaltsAbstract
The efficiency of Concentrated Solar Power technologies increases with the operation temperature of the power block, which can be achieved using advanced power cycles operating at temperatures ≥650°C. Molten Salt (MS) based HTF have been facing critical challenging issues of severe corrosion and lower specific heat capacity. This paper aims to present the NEWS4CSP project to the CSP scientific community, highlighting the main concepts being pursued and the preliminary results obtained regarding the application of new coatings to increase the anticorrosive protection of structural materials in contact with MS. Two different types of powder coatings (nickel and cobalt alloys) were applied to AISI 430 stainless steel using two coating technologies: High Velocity Oxy-Fuel (HVOF) and Laser Cladding (LC). LC proved to be the most suitable technique of these two coating application technologies. The Co-Cr coating alloy showed good anticorrosive behaviour even after 3000 h of testing. The obtained results are very promising, nevertheless, more studies are needed to optimise its application by LC. These include optimizing the thickness and chemical composition, as well as gaining a deeper understanding of the degradation mechanisms and whether this behaviour is maintained over longer periods.
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Copyright (c) 2025 Teresa C. Diamantino, Fátima Pedrosa, Teresa Paiva, Eduardo Silva, Francisco Gonçalves, Renato Monteiro, João P. Cardoso
This work is licensed under a Creative Commons Attribution 4.0 International License.
Accepted 2025-03-28
Published 2025-11-18
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Fundação para a Ciência e a Tecnologia
Grant numbers 2022.05021.PTDC;https://doi.org/10.54499/2022.05021.PTDC