4.7 Article

Corrosion protection by hydrophobic silica particle-polydimethylsiloxane composite coatings

期刊

CORROSION SCIENCE
卷 99, 期 -, 页码 89-97

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.06.018

关键词

Carbon steel; Organic coatings; EIS; Electrochemical calculation; Polymer coatings

资金

  1. Swedish Foundation for Strategic Research (SSF) through the program Microstructure, Friction and Corrosion Control
  2. Research Institutes of Sweden AB (RISE)
  3. 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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