2026-04-17T14:05:11Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/4249092026-01-15T08:55:34Zcom_2072_1033col_2072_452950

Effect of repetition passes in the laser surface texturing of AISI 301LN steel on the anticorrosion properties in molten carbonate salts Rezayat, Mohammad Morales Comas, Miguel Zahrani, Esmail Moradi, Mahmoud Azarhoushang, Bahman Mateo García, Antonio Manuel Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials Universitat Politècnica de Catalunya. CIEFMA-PROCOMAME - Disseny Microestructural i Fabricació Avançada de Materials Àrees temàtiques de la UPC::Enginyeria dels materials Additive manufacturing Fabricació additiva Laser Surface Texturing (LST) has recently emerged as a corrosion mitigation strategy for materials in contact with high-temperature molten salts used in the next-generation Concentrated Solar Power (CSP) technology. Some issues related to the LST parameters, which may affect the corrosion resistance, have not been addressed yet. Therefore, the present work is focused on the effect of laser input density and pass repetitions for improving the corrosion resistance in molten carbonate salts of AISI 301LN stainless steel. The textured surface produced by a nanosecond laser and the oxide scales formed during subsequent corrosion tests in a molten salt mixture of Li2CO3single bondNa2CO3-K2CO3 at 600 °C were analysed by complementary analytical and microscopy techniques. The results showed that the treated-surface samples at high laser power presented a strong decrease in corrosion rate, as compared with the as-received sample. This is attributed to the formation of a thicker and denser protective oxide scale. However, high laser power increased the susceptibility to corrosion at the heat-affected zone (HAZ). It could be effectively prevented with the accumulation of laser repetition passes, offering a new potential approach to maximize the enhancement of corrosion resistance using LST in the design of components for next-generation CSP plants. Peer Reviewed Postprint (author's final draft) 2025-03 Article Rezayat, M. [et al.]. Effect of repetition passes in the laser surface texturing of AISI 301LN steel on the anticorrosion properties in molten carbonate salts. "Materialia", Març 2025, vol. 39, núm. article 102365. 2589-1529 https://hdl.handle.net/2117/424909 10.1016/j.mtla.2025.102365 eng https://www.sciencedirect.com/science/article/abs/pii/S2589152925000328 http://creativecommons.org/licenses/by-nc-nd/4.0/ Restricted access - publisher's policy Attribution-NonCommercial-NoDerivatives 4.0 International application/pdf