Electrochemical study of environmentally friendly coatings for protection of ASTM ...
| Grant number: | 13/23060-9 |
| Support type: | Scholarships abroad - Research Internship - Master's degree |
| Effective date (Start): | January 15, 2014 |
| Effective date (End): | April 14, 2014 |
| Field of knowledge: | Physical Sciences and Mathematics - Chemistry |
| Principal Investigator: | Assis Vicente Benedetti |
| Grantee: | Jéssica Verger Nardeli |
| Supervisor abroad: | Maria de Fátima Grilo da Costa Montemor |
| Home Institution: | Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil |
| Local de pesquisa : | 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) | |