文献类型：期刊文献

英文题名：Design and enhanced anticorrosion performance of a Zn5Mo2O11?5H2O/h-BN nanocomposite with labyrinth of nanopores

作者：Wang, Feng-Rui[1];Sheng, Xiao-Xiao[1];Zhang, Min[1];Miao, Min[1];Liu, Jin-Ku[1];Liu, Ji-Chang[2];Ma, Yun-Sheng[3];Liu, Peng-Peng[3]

机构：[1]East China Univ Sci & Technol ECUST, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[3]Shandong Chambroad Holding Grp Co Ltd, Shandong 256500, Peoples R China

年份：2023

卷号：15

期号：7

起止页码：3199

外文期刊名：NANOSCALE

收录：;EI(收录号：20230613560399);WOS:【SCI-EXPANDED(收录号:WOS:000918351900001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant 21878090) and the Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan Province (Grant 2020CL04).

语种：英文

外文关键词：Corrosion resistance - Corrosion resistant coatings - Electrochemical corrosion - Electrochemical impedance spectroscopy - Electrolytes - Epoxy resins - Hydrothermal synthesis - III-V semiconductors - Nanopores - Sodium chloride - Steel corrosion

摘要：Zinc molybdate (ZMO) is a safe and effective grafting material for anticorrosion. Herein, we reported the synthesis of ZMO/h-BN with the labyrinth of capillary pores owing to the in situ growth of ZMO on flake hexagonal boron nitride (h-BN) using the hydrothermal method. The special morphological structure provided a tortuous path for aggressive species to the steel substrate, which extended and blocked the transmission of aggressive species, enhancing the physical corrosion barrier performance. In addition, the capillary pores of ZMO contributed to the competitive adsorption of Cl- in an electrolyte and reduced the diffusion of aggressive species, thus further delaying the corrosion process. Moreover, the capture of oxygen by forming a B-O bond with h-BN and the formation of a molybdate passive film are beneficial for the inhibition of cathodic and anodic reactions. As verified by electrochemical impedance spectroscopy (EIS), the anticorrosion performance of ZMO/h-BN coating increased by 49.58% and 130.72% compared with ZMO and epoxy resin (EP) coatings after immersing in a NaCl aqueous solution (3.50 wt%) for 72 h. This coating matrix provides an avenue for molybdate-based corrosion remediation.