Superior corrosion- and wear-resistance of graphene oxide with the aid of composite silanes

被引:3
|
作者
Wang, Ying [1 ]
Yin, Minhao [1 ]
Bao, Huayang [1 ]
Zhao, Xiaobing [1 ]
Cheng, Guanggui [3 ]
Yuan, Ningyi [1 ]
Ding, Jianning [1 ,2 ,3 ]
机构
[1] Changzhou Univ, Jiangsu Collaborat Innovat Ctr Photovolt Sci & Eng, Natl Expt Demonstrat Ctr Mat Sci & Engn, Sch Mat Sci & Engn,Jiangsu Prov Cultivation Base f, Changzhou 213164, Peoples R China
[2] Yangzhou Univ, Inst Technol Carbon Neutralizat, Yangzhou 225127, Peoples R China
[3] Jiangsu Univ, Micro Nano Sci & Technol Ctr, Zhenjiang 212013, Peoples R China
来源
MATERIALS TODAY COMMUNICATIONS | 2024年 / 39卷
关键词
Magnesium alloy; Graphene oxide; Silane; Composite multi -layer coating; Corrosion; Wear resistance; MAGNESIUM ALLOY; SURFACE; PERFORMANCE; COATINGS; DEGRADATION; FABRICATION; REDUCTION; SUBSTRATE; FRICTION; IMPROVE;
D O I
10.1016/j.mtcomm.2024.108635
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The practical application of magnesium alloy was limited greatly by the inherent poor corrosion- and wearresistance. Herein, a composite coating composed of graphene oxide (GO), bis[3-(triethoxysilyl)propyl]tetrasulfide and octadecyltrimethoxysilane was prepared by spin -coating. Due to the cross -linking between silanes and GO, the so -obtained composite coating was more compact and less porous as compared with the coating of GO. The hydrophobicity was enhanced by the -S -S -S -S- moiety and high -density CH 2 group in the silane chain; consequently, the so -obtained composite coating having the contact angle of about 140 degrees was more hydrophobic as compared with the coating of GO (about 10 degrees ). Such a composite coating with higher hydrophobicity, denser siloxane networks and more compacter layered GO could slow down the permeation of corrosion medium and prolong the corrosion path. It was found that, compared to that of the Mg alloy substrate, the E corr of the composite coating increased by 713 mV and the i corr value decreased by nearly three orders of magnitude. Moreover, the composite coating possessed excellent wear resistance due to the intrinsic layered structure of GO and the good lubricity of silane.
引用
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页数:9
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