文献类型：期刊文献

英文题名：Enhanced corrosion resistance of polybenzoxazine coatings by epoxy incorporation

作者：Zhou, Changlu[1];Lin, Jiaping[2];Lu, Xin[3];Xin, Zhong[3]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2016

卷号：6

期号：34

起止页码：28428

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20161402205274);WOS:【SCI-EXPANDED(收录号:WOS:000372610200031)】；

基金：The authors gratefully acknowledge the financial from Program of Shanghai Subject Chief Scientist (10XD1401500), Program of Leading Talents (2013), National Natural Science Foundation of China (21506062), Fundamental Research Funds for the Central Universities (22A201514015), China Postdoctoral Science Foundation (2015M571509), Shanghai Key Laboratory of Multiphase Materials Chemical Engineering (MMCE2015004) and Lanpec Technologies Co., Ltd (China).

语种：英文

外文关键词：Corrosion resistant coatings - Fourier transform infrared spectroscopy - Steel corrosion - Electrochemical corrosion - Electrochemical impedance spectroscopy - Polarization - Composite coatings

摘要：Polybenzoxazine/epoxy composite coating has been developed on mild steel (MS) substrates by a thermal curing method. The reaction between two components was characterized by Fourier transform infrared spectroscopy (FTIR). The effects of incorporating epoxy on the corrosion resistance of coated steel were investigated by open circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy, respectively. The resulted composite coated samples exhibit significant enhancement on the corrosion resistance of MS with the corrosion current reduced by more than one order of magnitude, and the enhancement is improved with an increase in the epoxy content, which benefits from the dual crosslinking network of the composite coating through the incorporation of epoxy. In addition to enhancing the coating barrier performance, all coated samples are substantially hydrophobic with a contact angle of above 100 degrees before and even after the polarization measurements.