文献类型：期刊文献

英文题名：Active Corrosion Protection of Metals by Mussel Bionic Modified Halloysite Nanotube Composite Waterborne Coatings

作者：Zhao, Chenyu[1]; Hu, Yuan[1]; Guo, Weihong[1]

机构：[1] Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230122013)

语种：英文

外文关键词：Amines - Composite coatings - Corrosion inhibitors - Corrosion resistance - Electrochemical corrosion - Electrochemical impedance spectroscopy - Enamels - Epoxy resins - Etching - Field emission microscopes - Kaolinite - Nanotubes - Neurophysiology - Scanning electron microscopy - Sodium chloride

摘要：A novel halloysite nano-filler PDA@T-AHNT has been synthesized. After mild selective etching of halloysite nanotube (HNT) with acetic acid, corrosion inhibitor methyl benzotriazole (TTA) was loaded into the inner cavity by vacuum encapsulation method to synthesize the first step modified halloysite nanotubes loaded with the corrosion inhibitor (T-AHNT). Next, T-AHNT was coated with dopamine to prevent TTA from being released without corrosion, taking advantage of the self-polymerization of dopamine (DA) in an alkaline environment, the final novel halloysite nanofiller was synthesized (PDA@T-AHNT). Subsequently, different mass fractions of PDA@T-AHNT were added to the waterborne epoxy resin to form composite coatings, pure epoxy coatings and composite coatings with T-AHNT were also prepared as controls. The microscopic morphology of the coating was observed by field emission scanning electron microscopy (FE-SEM) and the electrochemical behavior of the coating was tested by electrochemical impedance spectroscopy (EIS) when immersed in 3.5 wt% NaCl for 60 days to characterize the corrosion resistance of the coating. The final results show that the composite coating with 3 wt% PDA@T-AHNT (EPP-3) has the best corrosion resistance, maintaining a high low frequency impedance value after 60 days of immersion. ? 2023, The Authors. All rights reserved.