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Corrosion protection by multilayer coating using layer-by-layer technique

In this work, polyaniline (PAni), a polycation, and poly (vinylsulfonic acid, sodium salt) (PVSS), a polyanion, were used for preparing multilayer thin films on AA2024 alloy surface using the layer-by-layer growth technique. The corrosion of AA2024 alloy surfaces coated with a number n (n = 0, 1, 5,...

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Bibliographic Details
Published in:Surface & coatings technology 2011-01, Vol.205 (8), p.2857-2864
Main Authors: Gomes, E.C., Oliveira, M.A.S.
Format: Article
Language:English
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Summary:In this work, polyaniline (PAni), a polycation, and poly (vinylsulfonic acid, sodium salt) (PVSS), a polyanion, were used for preparing multilayer thin films on AA2024 alloy surface using the layer-by-layer growth technique. The corrosion of AA2024 alloy surfaces coated with a number n (n = 0, 1, 5, 8, 10, 15) of multilayered thin films was investigated in 0.1 M NaCl aqueous solutions using potentiodynamic polarization, chronoamperometry and electrochemical impedance spectroscopy (EIS) techniques. These electrochemical tests were conducted at a temperature of (25 ± 2) °C. Surface coated with 08 (PVSS / PAni) bilayers presented greater resistance to corrosion in the chloride containing environment. ►Preparing multilayer thin films using the layer-by-layer growth technique ►PAni and PVSS were used to form multilayer films on AA2024 alloy surfaces ►Potentiodynamic polarization, chronoamperometric and EIS tests ►The best corrosion protection is provided by the 08 (PVSS / PAni) bilayer films
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2010.10.061