abstract
The present work reports the synthesis of layered double hydroxides (LDHs) nanocontainers loaded with different corrosion inhibitors (vanadate, phosphate, and 2-mercaptobenzothiazolate) and the characterization of the resulting pigments by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The anticorrosion activity of these nanocontainers with respect to aluminum alloy AA2024 was investigated by electrochemical impedance spectroscopy (EIS). The bare metallic substrates were immersed in dispersions of nanocontainers in sodium chloride solution and tested to understand the inhibition mechanisms and efficiency. The nanocontainers were also incorporated into commercial coatings used for aeronautical applications to study the active corrosion protection properties in systems of industrial relevance. The results show that an enhancement of the active protection effect can be reached when nanocontainers loaded with different inhibitors are combined in the same protective coating system.
keywords
LAYERED DOUBLE HYDROXIDES; ANTICORROSION COATINGS; FILIFORM CORROSION; ORGANIC COATINGS; PLANT-SURFACES; MILD-STEEL; AA2024-T3; PIGMENTS; RELEASE; PHOSPHATE
subject category
Science & Technology - Other Topics; Materials Science
authors
Tedim, J; Poznyak, SK; Kuznetsova, A; Raps, D; Hack, T; Zheludkevich, ML; Ferreira, MGS
our authors
Alena Kuznetsova
Research Fellowship
João Tedim
Associate Professor
Mário Guerreiro Silva Ferreira
Retired Professor
Mikhail Zheludkevich
Invited Principal Researcheracknowledgements
This work was supported by EU FP7 project