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Nanocomposite coatings obtained by sol-gel for adhesion and protection against corrosion of aluminum alloys

Grant number: 19/13723-7
Support type:Regular Research Grants
Duration: August 01, 2019 - July 31, 2021
Field of knowledge:Engineering - Aerospace Engineering
Principal Investigator:Luciana de Simone Cividanes Coppio
Grantee:Luciana de Simone Cividanes Coppio
Home Institution: Divisão de Ciências Fundamentais (IEF). Instituto Tecnológico de Aeronáutica (ITA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil
Assoc. researchers:Elizabete Yoshie Kawachi ; Evelyn Alves Nunes Simonetti ; Kumiko Koibuchi Sakane

Abstract

Aluminum alloy is one of the most used materials in the aeronautical, space and automotive sectors, being common the use of anodization and chromatization processes as surface treatment to improve its adhesion and protection against corrosion. However, they exhibit high toxicity. Among the most promising alternatives for the replacement of these processes are the sol-gel systems based on silanes, being that graphene oxide (GO) has been added to these films as nanoreforcement. However, many parameters may influence in the final efficiency of a nanocomposite synthesized via sol-gel, and it is not clear in the literature the influence of each one. Thus, the objective of this work is the development of nanocomposite films based on inorganic (tetraethoxysilane-TEOS) and organic (3-glycidoxypropyl trimethoxysilane-GPTMS) hybrid sol-gel, with the adition of GO, for adhesion and protection against corrosion of the aluminum alloy AA2024, studying in particular: viscosity at the time of film deposition, molar ratio TEOS/GPTMS and amount of GO. Infrared spectroscopy (FT-IR), viscosity, microscopy (SEM and confocal), associated with adhesion tests (tape test, shear, microhardness) and corrosion protection tests (electrochemical impedance spectroscopy - EIE - and immersion in synthetic sea water) will be carried out, and the correlation between the information obtained will allow the optimization of parameters for the development of coatings synthesized via sol-gel, aiming at the replacement of the current metal surface treatment methods practiced by the domestic industry, which are toxic, complex and expensive. (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)
COUTINHO SILVA, AMANDA ALVARENGA; GOMES, THAYNA IPOLITO; PEREIRA MARTINS, BRENDA DIANE; RIVERO GARCIA, RENATA BATISTA; CIVIDANES, LUCIANA DE SIMONE; KAWACHI, ELIZABETE YOSHIE. New Insights in Adhesive Properties of Hybrid Epoxy-Silane Coatings for Aluminum Substrates: Effect of Composition and Preparation Methods. Journal of Inorganic and Organometallic Polymers and Materials, FEB 2020. Web of Science Citations: 0.
PEREIRA MARTINS, BRENDA DIANE; BARBIERI, LAIS DE CAMPOS; COUTINHO SILVA, AMANDA ALVARENGA; GOULART, NAIANA SERAFIM; RIVERO GARCIA, RENATA BATISTA; CIVIDANES, LUCIANA DE SIMONE; KAWACHI, ELIZABETE YOSHIE. Silane-Based Hybrid Coatings for the Corrosion Protection of AA 2024-T3 Alloy. JOURNAL OF AEROSPACE TECHNOLOGY AND MANAGEMENT, v. 11, n. SI, p. 58-61, 2019. Web of Science Citations: 0.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.