An electrochemical and superficial assessment of the corrosion behavior of AA 2024-T3 treated with metacryloxypropylmethoxysilane and cerium nitrate

Tamborim, Silvia Margonei Mesquita; Maisonnave, A.P.Z.; Azambuja, Denise Schermann; Englert, Gelsa Edith

doi:10.1016/j.surfcoat.2008.06.173

Cited by 26 publications

(11 citation statements)

References 34 publications

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“…Recently, different inhibitors have been studied to prevent corrosion of metal surfaces. Cerium compounds appeared, through lot of works, as a promising corrosion inhibitor to replace chromate compounds for the corrosion protection of various metallic compounds, especially aluminum alloys [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Effect of cerium on structure modifications of a hybrid sol–gel coating, its mechanical properties and anti-corrosion behavior

Cambon

Esteban

Ansart

et al. 2012

Materials Research Bulletin

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Section: Introductionmentioning

confidence: 99%

Effect of cerium on structure modifications of a hybrid sol–gel coating, its mechanical properties and anti-corrosion behavior

Cambon

Esteban

Ansart

et al. 2012

Materials Research Bulletin

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“…EIS has been widely used for the investigations of coated metals and alloys in corrosive media [5,18,[36][37][38][39]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Electrodeposition of cerium (III)-modified bis-[triethoxysilypropyl]tetra-sulphide films on AA2024-T3 (aluminum alloy) for corrosion protection

Liu

et al. 2010

Surface and Coatings Technology

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“…The protection against active corrosion obtained in the presence of an inhibiting component in this pretreatment allows the corrosion rate to be minimized, preventing the degradation of the metal. Thus, a synergistic effect is obtained by using a silane layer modified with an inhibitor [7,8,9,10] Recent studies have been carried out with the use of silanes in combination with inhibitors [11], bilayer systems where a silane coating precedes the epoxy paint [12] and epoxy coating systems which are modified with silanes [13].…”

Section: Introducionmentioning

confidence: 99%

Revestimentos a base de TEOS/ácido fosfônico como tratamento anticorrosivo para a liga AA2024-T3

Cendron

Azambuja

2016

Matéria (Rio J.)

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RESUMOO objetivo deste estudo foi investigar o comportamento corrosivo da liga de alumínio AA2024-T3 tratada com filmes obtidos pela combinação de tetraetilortossilicato (TEOS) com ODPA (ácido octadecilfosfônico) em solução de NaCl 0,05 mol L -1 . As razões volumétricas de TEOS/etanol/água utilizadas foram 4:90:6 e 4:80:16, e os filmes formados foram denotados como 90TEOS e 80TEOS respectivamente. A adição de áci-do fosfônico nos filmes TEOS foi testada como uma maneira de se obter um efeito cooperativo, a fim de melhorar as características de proteção do revestimento. Análises de espectroscopia de impedância electroquí-mica (EIE) e polarização potenciodinâmica mostraram que os filmes 90TEOS na presença de ODPA apresentaram um maior módulo de impedância após 168 horas de imersão em solução de cloreto. Os resultados obtidos indicam que os filmes obtidos apenas com TEOS não fornecem uma proteção adequada contra a corrosão, evidenciando a existência de sinergismo entre o ácido fosfônico e TEOS. Essa melhora foi relacionada à maior hidrofobicidade dos revestimentos.Palavras chaves: Liga de Alumínio, Silano, Ácido fosfônico, EIE. ABSTRACTThe aim of this study was to investigate the corrosion behavior of aluminum alloy AA2024-T3 substrates treated with self-assembled films obtained by combining tetraethylorthosilicate (TEOS) with ODPA (octadecylphosphonic acid)in a 0.05 mol L-1 NaCl solution. The volumetric ratios of TEOS/ethanol/water used were 4:90:6 and 4:80:16, and the corresponding films formed were denoted as 90TEOS and 80TEOS, respectively. The addition of phosphonic acid to TEOS films was tested as a way to obtain a cooperative effect in order to improve the protective characteristics of the coating. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization data showed that the 90 TEOS films in the presence of ODPA had the highest impedance modulus after 168h of immersion in chloride solution. The results obtained indicate that undoped sol-gel coatings do not provide adequate protection against corrosion, evidenced by the existence of synergism between phosphonic acid and TEOS, improving the hydrophobicity of the films.

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An electrochemical and superficial assessment of the corrosion behavior of AA 2024-T3 treated with metacryloxypropylmethoxysilane and cerium nitrate

Cited by 26 publications

References 34 publications

Effect of cerium on structure modifications of a hybrid sol–gel coating, its mechanical properties and anti-corrosion behavior

Effect of cerium on structure modifications of a hybrid sol–gel coating, its mechanical properties and anti-corrosion behavior

Electrodeposition of cerium (III)-modified bis-[triethoxysilypropyl]tetra-sulphide films on AA2024-T3 (aluminum alloy) for corrosion protection

Revestimentos a base de TEOS/ácido fosfônico como tratamento anticorrosivo para a liga AA2024-T3

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