Advanced anticorrosive coatings prepared from electroactive polyimide-TiO2 hybrid nanocomposite materials

作者：Weng Chang Jian; Huang Jane Yu; Huang Kuan Yeh; Jhuo Yu Sian; Tsai Mei Hui; Yeh Jui Ming^*

来源：Electrochimica Acta, 2010, 55(28): 8430-8438.

DOI：10.1016/j.electacta.2010.07.063

• Nanocomposite
• Titania
• Polyimide
• Corrosion
• Electroactive

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

• 出版日期2010-12-1