Enhancing the corrosion resistance of aluminum by superhydrophobic silane/graphene oxide coating

被引：41
作者：
Du, X. Q. [1 ]
Liu, Y. W. [2 ]
Chen, Y. [1 ,2 ]
机构：
[1] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 256600, Guangdong, Peoples R China
[2] Binzhou Univ, Dept Chem Engn & Safety, Binzhou 256600, Shandong, Peoples R China
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2021年 / 127卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Corrosion; Aluminum; Superhydrophobic; Graphene oxide; SILANIZED GRAPHENE OXIDE; PROTECTIVE PROPERTIES; HYBRID COATINGS; MILD-STEEL; ALLOY; FILMS; POLYURETHANE; PERFORMANCE; ACID; ELECTRODEPOSITION;
D O I：
10.1007/s00339-021-04730-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Superhydrophobic silane/graphene oxide (GO) composite coating was successfully synthesized on aluminum surface by a facile dipping and curing process. The structure and composition of the obtained composite coating was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectra and X-ray photoelectron spectroscopy. Surface characterization results suggested that the single-layer GO functionalized with silane and formed uniform coating on aluminum surface. Electrochemical impedance spectroscopy (EIS) and electrochemical noise were used to investigate the anti-corrosion behavior of the prepared superhydrophobic silane/GO coating on aluminum in 1 M NaCl solution. The EIS results indicated that the prepared silane/GO coating exhibited the largest impedance compared with the silane coating and bare aluminum substrate. Besides, the values of R-ct for the prepared superhydrophobic silane (936 omega cm(2)) and silane/GO coatings (1670 omega cm(2)) are more than 24 and 43 times that of the bare aluminum substrate (38.5 omega cm(2)), respectively. Moreover, the pitting corrosion process of aluminum in NaCl solution was strongly inhibited in the prepared superhydrophobic silane and silane/GO coatings. Therefore, this work supplies an easy and economical way to prepare outstanding anti-corrosion coatings on aluminum surface, which promises a significant potential for practical applications.
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页数：11
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