Fernández-Hernán, Juan PabloLópez, Antonio JulioTorres, BelénRams, Joaquín2024-01-182024-01-182020-06-20J.P. Fernández-Hernán, A.J. López, B. Torres, J. Rams, Silicon oxide multilayer coatings doped with carbon nanotubes and graphene nanoplatelets for corrosion protection of AZ31B magnesium alloy, Progress in Organic Coatings, Volume 148, 2020, 105836, ISSN 0300-9440, https://doi.org/10.1016/j.porgcoat.2020.105836.0300-9440https://hdl.handle.net/10115/28531Magnesium (Mg) AZ31B alloy substrates were coated by the dip-coating method to obtain four different coating configurations. Three different sol-gels were synthesized to create different monolayer and multilayer coating configurations from two silicon alkoxides, tetraethyl orthosilicate (TEOS) and methyl-triethoxysilane (MTES). Two of these sol-gel solutions were doped with nanocharges. The final concentration of nanocharges in the coatings was 0.045 wt% and 0.046 wt% for multiwall carbon nanotubes (MWCNTs) and functionalized graphene nanoplatelets (COOH-GNPs), respectively. The anti-corrosion behaviour of these coatings was assessed by electrochemical and hydrogen evolution tests in 3.5 wt% NaCl solution. All of the coating configurations significantly improved the behaviour against corrosion compared with the bare substrate, especially the SG + SG/GNP (sol-gel + sol-gel doped with 0.046 wt% COOH-GNPs) multilayer coating system. The sol-gel synthesis combined with the dip-coating method was demonstrated to be an effective way to generate compact and homogeneous coatings for corrosion protection.engAttribution-NonCommercial-NoDerivs 4.0 Internationalhttps://creativecommons.org/licenses/by-nc-nd/4.0/Magnesium, Corrosion, Coating, Sol-Gel, Carbon nanotubes, Graphene nanoplateletsinfo:eu-repo/semantics/article10.1016/j.porgcoat.2020.105836info:eu-repo/semantics/restrictedAccess