用于镁合金的超疏水电沉积纳米 sio2/N 掺杂碳点涂层

IF 4.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Xutong Duan , Yongfei Wang , Ruijie Guo , Baolong Niu , Huifang Wang , Hong Yan
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引用次数: 0

摘要

为了解决一般超疏水涂层耐腐蚀性差、附着力低和耐磨性差的问题,在 AZ31B 镁合金表面制备了一种超疏水纳米二氧化硅/N 掺杂碳点(N-CDs)涂层。电解液由纳米二氧化硅颗粒和 N-CDs 分散液组成,其中创新性地添加了纳米二氧化硅颗粒,以提高涂层的耐磨性。经 1H,1H,2H,2H-全氟辛基三乙氧基硅烷(PTES)进行超疏水改性后,涂层的水接触角(WCA)为 154°,滚动角(RA)为 7°。通过电位极化和电化学阻抗光谱(EIS)进行的分析表明,与未涂层的镁合金样品相比,涂层镁合金样品的电化学性能有所提高。Mg2+ 与 N-CD(-NH2、-COOH 和 -OH)官能团配位形成的集合体被电沉积到镁合金基体表面,形成一层致密的保护膜,从而减缓了腐蚀速度。同时,耐磨性测试结果表明,制备的涂层具有优异的耐磨性,能够在一定程度上抵御摩擦对涂层造成的破坏,为在镁合金上制备耐磨性更强的超疏水涂层提出了新的思路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Superhydrophobic electrodeposited nano-sio2/N-doped carbon dots coating for Mg alloys
To solve the problems of poor corrosion resistance, low adhesion and poor abrasion resistance of general superhydrophobic coatings, A superhydrophobic nano-SiO2/N-doped carbon dots (N-CDs) was prepared on the surface of AZ31B magnesium alloy. The electrolyte consisted of nano-silica particles and N-CDs dispersion, where nano-SiO2 particles were innovatively added to improve the abrasion resistance of the coating. After the superhydrophobic modification by 1H,1H,2H,2H-perfluorooctyltriethoxysilane (PTES), the coating exhibited a water contact angle (WCA) of 154° and a rolling angle (RA) of 7°. The analysis undertaken via potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) demonstrated improved electrochemical performance for the coated magnesium alloy samples when compared with uncoated counterparts. The assemblies formed by the coordination of Mg2+ with the functional groups of N-CD (−NH2, –COOH and –OH) were electrodeposited onto the surface of the magnesium alloy matrix, achieving a dense protective film and thereby slowing down the corrosion rate. At the same time, the abrasion resistance test results indicated that the prepared coating possessed excellent abrasion resistance, possessing the ability to resist damage to the coating caused by friction to a certain extent, proposing a new idea for fabricating superhydrophobic coatings with increased abrasion resistance on Mg alloys.
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来源期刊
Materials Chemistry and Physics
Materials Chemistry and Physics 工程技术-材料科学:综合
CiteScore
8.70
自引率
4.30%
发文量
1515
审稿时长
69 days
期刊介绍: Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.
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