Electrochemical study of environmentally friendly coatings for protection of ASTM 1200 aluminum alloy

• Grant number: 12/22431-0
• Support Opportunities: Scholarships in Brazil - Master
• Start date: March 01, 2013
• End date: June 30, 2014
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Assis Vicente Benedetti
• Grantee: Jéssica Verger Nardeli
• Host Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Associated scholarship(s): 13/23060-9 - Study of the mechanism of corrosion by SVET techniques and laws in environmentally friendly coatings applied aluminum alloy ASTM 1200, BE.EP.MS

Abstract

In the present project, it will be carried out by infrared spectroscopy characterization Fourier Transform (FT-IR) and the study and electrochemical corrosion of organic - inorganic films applied onto aluminum alloys AA1200 H14 for the purpose of protection against corrosion in aggressive media. The coatings were generically designated by Pol 2, PEC1, PEC2, PEC3. Pol 2 means hydroxylated oligomer synthesized from ricinoleic acid and trimethylolpropane (TMP); 1 PEC, PEC 2, 3 PEC mean polyesters synthesized from crambe oil, mixed in proportions of 1:2 and 1:3 with H3 (pre hexadietileno polymer-diisocyanate (HDI) and oxygenated solvents such as ethyl acetate + ethyl glycol acetate) and H3B (HDI prepolymer with, oxygenated solvents and biodiesel - ethyl acetate + biodiesel). The function of these coatings is to protect the substrate against corrosion, risks or damages to the environment and improve the aesthetics of the surface of the aluminum alloy. The efficiency of this protection depends on the quality of the coating, substrate characteristics, coating/substrate interface and medium that will be submitted. The electrochemical response and corrosion resistance, especially in aqueous NaCl 3.5%, will be studied by open circuit potential measurements EOCP, linear and cyclic polarization curves, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and, if possible, by electrochemical noise analysis (ENA). After the characterization and analysis of the electrochemical results with respect to the alloy AA1200 coated and uncoated, it is intended to suggest the possible application of the coatings for corrosion protection in several sectors such as industrial equipments, packages, civil construction, chemical and pharmaceutical industries and refrigeration. A possible application to the food industry and as household items may be investigated in the future. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

NARDELI, J. V.; SNIHIROVA, D. V.; FUGIVARA, C. S.; MONTEMOR, M. F.; PINTO, E. R. P.; MESSADDECQ, Y.; BENEDETTI, A. V.. Localised corrosion assessement of crambe-oil-based polyurethane coatings applied on the ASTM 1200 aluminum alloy. Corrosion Science, v. 111, p. 422-435, OCT 2016. (12/22431-0, 13/23060-9)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

NARDELI, Jéssica Verger. Estudo eletroquímico de revestimentos ambientalmente amigáveis aplicados para proteção da liga de alumínio 1200. 2014. Master's Dissertation - Universidade Estadual Paulista (Unesp). Instituto de Química. Araraquara Araraquara.