Electrochemical evaluation of the corrosion protection of bi-dimensional organic films self-assembled onto brass

Monolayers of (3-mercaptopropyl)trimethoxysilane (MPTS) were grafted from ethanolic solution on electrochemically reduced brass surfaces. In a second step, hydrolysis of the trimethoxysilane functions (–Si(OMe) 3) has been carried out to anchor a second organic layer using either MPTS or (3-heptaflu...

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Bibliographic Details
Published in:Electrochimica acta 2004-07, Vol.49 (17), p.2987-2996
Main Authors: Sinapi, F, Deroubaix, S, Pirlot, C, Delhalle, J, Mekhalif, Z
Format: Article
Language:English
Subjects:
(3-Heptafluoroisopropoxy)propyltrichlorosilane
(3-Mercaptopropyl)trimethoxysilane
Applied sciences
Corrosion
Corrosion prevention
Cyclic voltammetry
Exact sciences and technology
Metals. Metallurgy
Polycrystalline brass
XPS
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Summary:Monolayers of (3-mercaptopropyl)trimethoxysilane (MPTS) were grafted from ethanolic solution on electrochemically reduced brass surfaces. In a second step, hydrolysis of the trimethoxysilane functions (–Si(OMe) 3) has been carried out to anchor a second organic layer using either MPTS or (3-heptafluoroisopropoxy)propyltrichlorosilane (HIPS) molecules. XPS, PM-IRRAS and contact angle measurements have been employed to characterize each step of the modified surfaces. The corrosion inhibition properties of the modified surfaces were investigated by cyclic voltammetry (NaOH 0.1 M). Compared to the MPTS monolayer, a significant enhancement of the brass corrosion protection was observed for the bilayers.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2004.01.058