resumo
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.
palavras-chave
LAYERED DOUBLE HYDROXIDES; ANTICORROSION COATINGS; FILIFORM CORROSION; ORGANIC COATINGS; PLANT-SURFACES; MILD-STEEL; AA2024-T3; PIGMENTS; RELEASE; PHOSPHATE
categoria
Science & Technology - Other Topics; Materials Science
autores
Tedim, J; Poznyak, SK; Kuznetsova, A; Raps, D; Hack, T; Zheludkevich, ML; Ferreira, MGS
nossos autores
Alena Kuznetsova
Bolseiro de investigação
João Tedim
Professor associado
Mário Guerreiro Silva Ferreira
Professor(a) Jubilado(a)
Mikhail Zheludkevich
Investigador Principal Convidadoagradecimentos
This work was supported by EU FP7 project