Tannin: A natural corrosion inhibitor for aluminum alloys

Author(s)

Nardeli, V, Jessica ; Fugivara, Cecilio S. ^[1] ; Taryba, Maryna ^[2] ; Pinto, Elaine R. P. ^[1] ; Montemor, M. F. ^[2] ; Benedetti, V, Assis

Affiliation

^[1] Nardeli, Jessica, V, V, Univ Estadual Paulista, UNESP, Inst Quim, BR-14800060 Araraquara, SP - Brazil

^[2] Nardeli, Jessica, V, Univ Lisbon, CQE, Inst Super Tecn, DEQ, Av Rovisco Pais, P-1049001 Lisbon - Portugal

• Document type: Journal article
• Source: Progress in Organic Coatings; v. 135, p. 368-381, OCT 2019.
• Web of Science Citations: 3

Abstract

This work aims at investigating the effect of tannin, a natural compound, as corrosion inhibitor for bare and coated aluminum alloys (AA1200). Tannin was characterized by Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (FTIR-ATR) and its interaction with the sample surface was evaluated by computational calculations using the density functional theory (DFT) and electrochemical measurements. The corrosion behavior was studied by open circuit potential (E 0c p), electrochemical impedance spectroscopy (EIS) and by the scanning vibrating electrode technique (SVET). Complementary studies were performed by scanning electron microscopy (SEM). Results demonstrated that tannin is an effective corrosion inhibitor protecting both coated and uncoated aluminum samples. (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