Corrosion protection methods for aluminum alloys

• Grant number: 04/12189-1
• Support Opportunities: Research Projects - Thematic Grants
• Start date: November 01, 2005
• End date: October 31, 2009
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Artur de Jesus Motheo
• Grantee: Artur de Jesus Motheo
• Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Pesquisadores principais: Isolda Costa ; Sergio Antonio Spinola Machado

Abstract

Conversion coating treatments such as chromating and phosphating have been used for a long time in the automobile industry to protect steels and aluminum alloys against corrosion. These processes are being banned as they generate toxic wastes. Consequently, alternate treatments are being proposed, and of these, this project focuses on: i) conducting polymer films, ii) self-assembled monolayer (SAM) and iii) cerium conversion layer. In addition to these treatments, which are under investigation in the laboratories associated to this project, the aim of this study is to combine some of the processes. For instance, surface preparation by SAM treatment followed by coating with a conducting polymer film, or, cerium conversion layer, to improve the adsorption of self-assembled molecules, or as anchor sites for chemically or electrochemically deposited conducting polymers. The main aim of the proposed studies is to increase the corrosion resistance of aluminum alloys. (AU)

Scientific publications

(5)

(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)

SALAZAR-BANDA, GIANCARLO R.; MORAES, SANDRA R.; MOTHEO, ARTUR J.; MACHADO, SERGIO A. S.. Anticorrosive cerium-based coatings prepared by the sol-gel method. Journal of Sol-Gel Science and Technology, v. 52, n. 3, p. 415-423, DEC 2009. (05/04641-4, 04/12189-1)

DE SOUZA, S.; YOSHIKAWA, D. S.; IZALTINO, W. A. S.; ASSIS, S. L.; COSTA, I.. Nanostructured surface pre-treatment based on self-assembled molecules for corrosion protection of Alclad 7475-T761 aluminum alloy. MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION, v. 62, n. 10, p. 913-919, OCT 2011. (04/12189-1)

BANCZEK, E. P.; MORAES, S. R.; ASSIS, S. L.; COSTA, I.; MOTHEO, A. J.. Effect of surface treatments based on self-assembling molecules and cerium coatings on the AA3003 alloy corrosion resistance. MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION, v. 64, n. 3, p. 199-206, MAR 2013. (05/04641-4, 04/12189-1)

DE SOUZA, S.; YOSHIKAWA, D. S.; IZALTINO, W. A. S.; ASSIS, S. L.; COSTA, I.. Self-assembling molecules as corrosion inhibitors for 1050 aluminum. SURFACE & COATINGS TECHNOLOGY, v. 204, n. 20, p. 3238-3242, 2010. (04/12189-1)

QUEIROZ, F. M.; DE MELO, H. G.; COSTA, I.; MARQUES, AT; SILVA, AF; BAPTISTA, APM; SA, C; ALVES, FJLA; MALHEIROS, LF; VIEIRA, M. Effect of Intermetallics on the Corrosion of Al 2024-T3 Alloy in Solutions with Different Chloride Concentration. Materials Science Forum, v. 587-588, p. 2-pg., 2008-01-01. (04/12189-1)