Journal
CORROSION SCIENCE
Volume 99, Issue -, Pages 89-97Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.06.018
Keywords
Carbon steel; Organic coatings; EIS; Electrochemical calculation; Polymer coatings
Funding
- Swedish Foundation for Strategic Research (SSF) through the program Microstructure, Friction and Corrosion Control
- Research Institutes of Sweden AB (RISE)
- Nils and Dorthi Troedsson Foundation for Scientific Research
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In this study, the time-dependent corrosion protection ability of 10-15 mu m thin polydimethylsiloxane-nanoparticle composite coatings was evaluated using mainly open circuit potential and electrochemical impedance spectroscopy measurements. The best result was obtained for the coating containing 20 wt% hydrophobic silica nanoparticles, where it was possible to achieve protection for almost 80 days in 3 wt% NaCl solution. The protective properties offered by this coating are suggested to be due to a synergistic effect of the hydrophobicity of the polydimethylsiloxane matrix and the prolonged diffusion path caused by addition of hydrophobic silica particles. (C) 2015 Elsevier Ltd. All rights reserved.
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