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

Novel healing coatings based on natural-derived polyurethane modified with tannins for corrosion protection of AA2024-T3

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Author(s):
Nardeli, Jessica V. [1, 2] ; Fugivara, Cecilio S. [1] ; Taryba, Maryna [2] ; Montemor, M. F. [2] ; Ribeiro, Sidney J. L. [1] ; Benedetti, Assis V. [1]
Total Authors: 6
Affiliation:
[1] Univ Estadual Paulista UNESP, Inst Quim, BR-14800060 Araraquara, SP - Brazil
[2] Univ Lisbon, Inst Super Tecn, DEQ, CQE, Av Rovisco Pais, P-1049001 Lisbon - Portugal
Total Affiliations: 2
Document type: Journal article
Source: Corrosion Science; v. 162, JAN 2020.
Web of Science Citations: 2
Abstract

Polyurethane coatings derived from crambe and castor oil formulated with different proportions of additives were modified with tannin and applied on AA2024-T3 coupons. The coatings were characterized by water uptake and attenuated total reflectance Fourier transform infrared spectroscopy (FTIR-ATR). The thickness of the coatings was determined by scanning electron microscopy (SEM) and adhesion was evaluated by the ASTM D3359 standard. The barrier properties and corrosion protection ability were assessed by open circuit potential (Eocp) and electrochemical impedance spectroscopy (EIS). The self-healing ability of the coatings was studied by localized impedance spectroscopy (LEIS) and by the scanning vibrating electrode technique coupled with the scanning ion -selective electrode technique (SVET/SIET). The measurements demonstrate that tannin-modified coatings provide effective corrosion protection due to polymer healing and the results give important highlights concerning the mechanism of corrosion inhibition. (AU)

FAPESP's process: 18/09040-9 - Evaluation of the self-healing properties of polyurethane coatings derived from vegetable oils with and without addition of corrosion inhibitors using localized electrochemical techniques and the study of chemical and structural properties.
Grantee:Jéssica Verger Nardeli
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 15/10554-9 - Polyurethanes Coatings derived from vegetable oil with and without addition of corrosion inhibitors: chemical, structural and corrosion resistance.
Grantee:Jéssica Verger Nardeli
Support Opportunities: Scholarships in Brazil - Doctorate