resumo
In this work we review results obtained using chitosan as a coating to protect aluminum alloy 2024. Different inhibitors were added to the matrix, interaction between inhibitor and functional groups from chitosan investigated and functionalization of chitosan performed in the bulk, as well as at the coating/solution interface to improve the barrier properties. The obtained systems were characterized by proton-nuclear magnetic resonance (H-1 NMR), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The protective performance was monitored using electrochemical impedance spectroscopy (EIS) and the scanning vibrating electrode technique (SVET). Overall, the obtained results support the possibility of using inhibitor-loaded chitosan systems to protect metallic substrates, either as components in multi-layer coatings systems, or as free-standing films. (C) 2015 Elsevier B.V. All rights reserved.
palavras-chave
STAINLESS-STEEL; CHITIN; 2-MERCAPTOBENZOTHIAZOLE; DEPOSITION; AA2024
categoria
Chemistry; Materials Science
autores
Carneiro, J; Tedim, J; Ferreira, MGS
nossos autores
João Tedim
Professor associado
Jorge Augusto Oliveira Carneiro
Bolseiro de pós-Doutoramento
Mário Guerreiro Silva Ferreira
Professor(a) Jubilado(a)Grupos
G3 - Materiais Eletroquímicos, Interfaces e Revestimentos
G4 - Materiais Renováveis e Economia Circular
agradecimentos
This work was developed in the scope of the project CICECO-Aveiro Institute of Materials (Ref. FCT UID /CTM /50011/2013), financed by national funds through the FCT/MEC and when applicable co-financed by FEDER under the PT2020 Partnership Agreement. JT thanks FCT for Researcher (IF/00347/2013) grant.