Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Localised corrosion assessement of crambe-oil-based polyurethane coatings applied on the ASTM 1200 aluminum alloy

Full text
Nardeli, J. V. ; Snihirova, D. V. ; Fugivara, C. S. ; Montemor, M. F. ; Pinto, E. R. P. ; Messaddecq, Y. ; Benedetti, A. V.
Total Authors: 7
Document type: Journal article
Source: Corrosion Science; v. 111, p. 422-435, OCT 2016.
Web of Science Citations: 4

Coatings composed of polyurethanes derived from polyesters of crambe oil and pre-polymer obtained from hexamethylene diisocyanate and castor oil were prepared (1:2 and 1:3, respectively) and applied on the Al alloy 1200. The corrosion resistance of the coated panels was studied by linear polarization and conventional electrochemical impedance (EIS). The fraction of an active area of the substrate was around 0.017% and 0.013% for the 1:2 and 1:3 coatings, respectively. The performance of pristine samples was also studied by electrochemical impedance spectroscopy. An artificial scratch was performed on pristine samples and the local corrosion activity was studied by localized impedance spectroscopy (LEIS) and scanning vibrating electrode technique (SVET) in NaCl solutions. Filiform corrosion was observed for the panel coated with the modified polyester and pre-polymer 1:3 after 12 h of test. The scratched sample of modified polyester and pre-polymer 1:2 showed better performance in NaCl solution and the coating seems to present a self-healing response to the artificial damage. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 12/22431-0 - Electrochemical study of environmentally friendly coatings for protection of ASTM 1200 aluminum alloy
Grantee:Jéssica Verger Nardeli
Support type: Scholarships in Brazil - Master
FAPESP's process: 13/23060-9 - Study of the mechanism of corrosion by SVET techniques and laws in environmentally friendly coatings applied aluminum alloy ASTM 1200
Grantee:Jéssica Verger Nardeli
Support type: Scholarships abroad - Research Internship - Master's degree