Study of the mechanism of corrosion by SVET techniques and laws in environmentally friendly coatings applied aluminum alloy ASTM 1200

• Grant number: 13/23060-9
• Support Opportunities: Scholarships abroad - Research Internship - Master's degree
• Start date: January 15, 2014
• End date: April 14, 2014
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Assis Vicente Benedetti
• Grantee: Jéssica Verger Nardeli
• Supervisor: Maria de Fátima Grilo da Costa Montemor
• Host Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Institution abroad: Universidade de Lisboa, Portugal
• Associated to the scholarship: 12/22431-0 - Electrochemical study of environmentally friendly coatings for protection of ASTM 1200 aluminum alloy, BP.MS

Abstract

This project proposes the use of scanning techniques for vibrant electrode (SVET) and localized electrochemical impedance spectroscopy (LEIS) to investigate the initiation of localized corrosion on aluminum alloy AA1200 H14 with and without organic coating of polyurethane. The surface characterization of the samples before and after exposure to an aggressive electrolyte is performed by scanning electron microscopy (SEM) and surface microanalysis (EDXS). The organic films with extensometer applied on aluminum alloys AA1200 H14 are generically designated by Pol 2, PEC1, PEC2, PEC3. This designation means 2 inch 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 to 1:3 with H3 (hexadietileno prepolymer with diisocyanate (HDI) and oxygenated solvents such as ethyl acetate, ethyl glycol acetate +) and H3B (HDI prepolymer with solvents and oxygenated biodiesel - ethyl acetate + biodiesel). The function of these coatings is to protect the substrate from corrosion, scratches, or injury to the environment and improve the aesthetics of the surface of the aluminum alloy. The efficiency of this protection depends on the quality and type of coating, substrate characteristics, interface coating/substrate and environment or means that will be submitted. This study complements the ongoing work in our laboratory on coatings applied on aluminum alloy AA1200 H14 and contribute to the training of graduate student Jessica in the area of corrosion and provide an opportunity to supplement your work with localized fairly advanced techniques. (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)