Evaluation of Nanostructured Polymeric Coatings for Steel Corrosion Protection

A. Aglan, A. Ludwick, M. Reeves
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Abstract

The effect of the addition of multi-walled carbon nanotubes (MWCNT) to epoxy and vinyl chloride/vinyl acetate copolymer (VYHH) coatings on their ability to protect the substrates was studied. Coatings were formulated from these resins with and without MWCNT reinforcement. Steel substrates were prepared and coated with each formulated coating and submerged in 5% NaCl solution to study effectiveness by means of Electrochemical Impedance Spectroscopy (EIS). Optical microscopy was used to capture the progress of sample corrosion. EIS measurements showed that the addition of MWCNTs to epoxy and VYHH coatings increased their charge transfer resistance in comparison with the neat coatings. This is an indication of the enhanced corrosion protection of the nanocoatings.
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纳米结构聚合物钢防腐涂层的评价
研究了在环氧树脂和氯乙烯/醋酸乙烯共聚物(VYHH)涂层中加入多壁碳纳米管(MWCNT)对基体保护能力的影响。涂料由这些树脂配制,有或没有MWCNT增强。采用电化学阻抗谱法(EIS)研究了不同配方涂料在钢基体上的涂覆效果。用光学显微镜观察样品腐蚀过程。EIS测试表明,与纯涂层相比,在环氧涂层和VYHH涂层中加入MWCNTs增加了它们的电荷转移电阻。这表明纳米涂层的防腐蚀能力增强。
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