RT Journal Article
T1 Properties of hybrid sol-gel coatings with the incorporation of lanthanum 4-hydroxy cinnamate as corrosion inhibitor on carbon steel with different surface finishes
A1 Suárez-Vega, Ana
A1 Agustín-Sáenz, Cecilia
A1 O'Dell, Luke A.
A1 Brusciotti, Fabiola
A1 Somers, Anthony
A1 Forsyth, Maria
AB In recent years, sol-gel chemistry has been of increasing interest for the development of hybrid organic-inorganic coatings as conversion coating replacements for carbon steel. They provide passive corrosion protection through the creation of a highly adhered coating with a barrier effect to the ionic movement, however, they do not offer active corrosion protection. Lanthanum 4-hydroxy cinnamate [La(4-OHCin)3] has been extensively studied and has demonstrated corrosion inhibition for carbon steel substrates. In this work, different concentrations of La(4-OHCin)3 have been directly incorporated into two sol-gel formulations with the aim of improving the overall corrosion protection provided by the hybrid coatings. The effect of La(4-OHCin)3 on the structure of the coating has been studied by 29Si MAS NMR. The effect on the corrosion protection of coatings deposited on carbon steel with different surface finishes has been examined by EIS and the surface analysis of these coatings has been characterised with techniques such as SEM-EDX and ATR/FT-IR. The better anticorrosion performance of the coatings containing La(4-OHCin)3 has been demonstrated independently of the surface finish. Also, optimum coating and inhibitor concentrations have been found and a correlation between the structural and morphological properties of the coatings and their anticorrosion performance has been identified.
SN 0169-4332
YR 2021
FD 2021-09-30
LK https://hdl.handle.net/11556/3645
UL https://hdl.handle.net/11556/3645
LA eng
NO Suárez-Vega , A , Agustín-Sáenz , C , O'Dell , L A , Brusciotti , F , Somers , A & Forsyth , M 2021 , ' Properties of hybrid sol-gel coatings with the incorporation of lanthanum 4-hydroxy cinnamate as corrosion inhibitor on carbon steel with different surface finishes ' , Applied Surface Science , vol. 561 , 149881 . https://doi.org/10.1016/j.apsusc.2021.149881
NO Publisher Copyright: © 2021 Elsevier B.V.
NO The authors thank the support of the Diputación Foral de Gipuzkoa through the project REANTI (Exp. 066/18) and the Basque Government for the Elkartek project Frontiers-V (ref. KK2019/00077). They would also like to thank the Australian Research Council (ARC) through grant DP180101465. The authors also would like to recognise Gorka Imbuluzqueta and Adrián Intxaurrandieta for their help with DSC and SEM-EDX characterisation respectively. The authors would like to thank Evgenii Modin from CIC Nanogune for his expertise in FEG-SEM.
DS TECNALIA Publications
RD 29 jul 2024