Journal
ELECTROCHIMICA ACTA
Volume 55, Issue 28, Pages 8430-8438Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.07.063
Keywords
Nanocomposite; Titania; Polyimide; Corrosion; Electroactive
Categories
Funding
- Ministry of Education Taiwan ROC [NSC-98-2113-M-033-001-MY3]
- Department of Chemistry at CYCU [CYCU-98-CR-CH]
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In this study we present the first preparation and corrosion protection studies of a series of electroactive polyimide-TiO2 (EPTs) hybrid nanocomposite materials containing conjugated segments of electroactive amino-capped aniline miner (ATs) and TiO2 nanoparticles of similar to 10 nm in diameter Redox behavior of as-prepared EPTs hybrid materials was identified by electrochemical cyclic voltammetry (CV) studies Higher concentration of TiO2 component in as-prepare corresponding EPTs was found to reveal better corrosion protection effect on cold-rolled steel (CRS) electrode based on sequential electrochemical corrosion measurements in 5 wt % NaCl electrolyte Enhancement of corrosion protection of EPTs coatings on CRS electrode could be interpreted by following three possible reasons (1) Electroactive polyimide (EPI) could act as a physical barrier coating (2) The redox catalytic capabilities of ATs units existed in EPTs may Induce the formation of passive metal oxide layers on CRS electrode (3) The well-dispersed TiO2 nanoparticles in EPTs matrix could act as effective hinder to enhance the oxygen barrier property of EPTs (C) 2010 Elsevier Ltd All rights reserved
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