abstract
An active protective coating based on chitosan (CTS) polymer with corrosion inhibitor 2-mercaptobenzothiazole (MBT) is reported. Structural and morphological analysis indicated that MBT is present in large amounts within the CTS matrix without affecting detrimentally the properties of CTS. More relevant, the release of MBT is dependent upon pH, resulting from the contribution of two factors: the chemistry of CTS (low pH) and the solubility of MBT (high pH). The performance of CTS-MBT was assessed using electrochemical impedance spectroscopy (EIS) and found to be promising as a temporary coating for active corrosion protection. (C) 2013 The Electrochemical Society. [DOI: 10.1149/2.002306eel] All rights reserved.
keywords
HYDROTALCITE-LIKE PIGMENTS; ALUMINUM-ALLOY; ANTICORROSION COATINGS; FILIFORM CORROSION; COATED AA2024-T3; PROTECTION; NANOCONTAINERS
subject category
Electrochemistry; Materials Science
authors
Carneiro, J; Tedim, J; Fernandes, SCM; Freire, CSR; Gandini, A; Ferreira, MGS; Zheludkevich, ML
our authors
Alessandro Gandini
Researcher
Carmen Sofia da Rocha Freire Barros
Coordinating Researcher
João Tedim
Associate Professor
Jorge Augusto Oliveira Carneiro
Post-Doc Fellowship
Mário Guerreiro Silva Ferreira
Retired Professor
Mikhail Zheludkevich
Invited Principal ResearcherGroups
G3 - Electrochemical Materials, Interfaces and Coatings
G4 - Renewable Materials and Circular Economy
acknowledgements
The authors gratefully acknowledge the financial support of CICECO (Financiamento Programatico da UI 89 CICECO). JT thanks Fundacao para a Ciencia e a Tecnologia for post-doctoral grant (ref. SFRH/BPD/64335/2009). The authors thank Professor Jose Antonio Teixeira Lopes Da Silva for kindly providing the rheometer for viscosity measurements and Ms. Alena Kuznetsova for performing HPLC measurements.