RT Journal Article
T1 LDH conversion films for active protection of AZ31 Mg alloy
A1 Pillado Ríos, Borja
A1 Mingo, Beatriz
A1 Del Olmo Martínez, Rubén
A1 Matykina, Endzhe
A1 Kooijman, A.M.
A1 Gonzalez-Garcia, Y.
A1 Arrabal Durán, Raúl
A1 Mohedano Sánchez, Marta
AB Zinc aluminium (Zn-Al) and lithium aluminium (Li-Al) – layered double hydroxides (LDH) coatings with incorporated inhibitors (Li−, Mo− and W−based) were successfully synthesized on AZ31 Mg alloy. Zn−Al LDH W and Li−Al LDH Li showed the highest corrosion resistance and were selected for further evaluation. SEM cross−section examination revealed a bi−layer structure composed of an outer part with loose flakes and a denser inner layer. XRD, FTIR, and XPS analysis confirmed the incorporation of the inhibitors. Post−treatments with corrosion inhibitors containing solutions resulted in the selective dissolution of the most external layer of the LDH coating, reducing the surface roughness, hydrophilicity and paint adhesion of the layers. Active corrosion properties were confirmed by SVET evaluation for the Zn−Al LDH W coating. The proposed active corrosion mechanism involves the ion−exchange of aggressive Cl− ions, deposition of hydroxides and competitive adsorption of W−rich corrosion inhibitors.
PB KEAI Publishing LTD
YR 2022
FD 2022-09-03
LK https://hdl.handle.net/20.500.14352/118079
UL https://hdl.handle.net/20.500.14352/118079
LA eng
NO B. Pillado, B. Mingo, R. del Olmo, E. Matykina, A.M. Kooijman, Y. Gonzalez−Garcia, R. Arrabal, M. Mohedano, LDH conversion films for active protection of AZ31 Mg alloy, Journal of Magnesium and Alloys, Volume 11, Issue 1, 2023, Pages 201-216, ISSN 2213-9567, https://doi.org/10.1016/j.jma.2022.09.014.
NO Agencia Estatal de Investigación
NO Ministerio de Ciencia, Innovación y Universidades
NO FEDER, EU
NO Comunidad de Madrid
NO Royal Academy of Engineering
DS Docta Complutense
RD 9 abr 2025