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Corrosion Resistance of Steel/Zinc with Silicate Nanoparticles/Polyurethane Paint Systems in NaCl Solution

Surface characteristics and corrosion behaviour of bare electrogalvanized steel coated with polymer/nano-silicate particles added to the electrogalvanizing bath were studied by scanning electron microscopy (SEM), energy dispersive spectrometer (EDXS) and electrochemical impedance spectroscopy (EIS)....

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Published in:Americanae (AECID Library)
Main Author: Célia Regina Tomachuk
Other Authors: Cecília Inês Elsner, Alejandro Ramón Di Sarli
Format: Article
Language:English
Published: 2012
Subjects:
Corrosion Behavior and Inhibition
Engineering and Materials Science Studies
Electrodeposition and Electroless Coatings
electrogalvanized steel
silicate nanoparticles
polyurethane paint
corrosion resistance
NaCl solution
barrier coatings
corrosion protection coatings
Online Access:http://hdl.handle.net/11336/100987
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Summary:Surface characteristics and corrosion behaviour of bare electrogalvanized steel coated with polymer/nano-silicate particles added to the electrogalvanizing bath were studied by scanning electron microscopy (SEM), energy dispersive spectrometer (EDXS) and electrochemical impedance spectroscopy (EIS). After applying a barrier polyurethane paint, the paint hardness, porosity, flexibility, colour, gloss, blistering and rusting degrees, and anticorrosive protective properties in 0.05 mol·L-1 NaCl solution were also evaluated. The results correlated well and, being demonstrative of the very slow deterioration rate of the immersed coated electrogalvanized steel, they enabled to assume that if a chemically analogous but thicker coating system was applied; it could be an acceptable alternative in real service conditions.

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