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首页> 外文期刊>RSC Advances >Achieving excellent anti-corrosion and tribological performance by tailoring the surface morphology and chemical composition of aluminum alloys
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Achieving excellent anti-corrosion and tribological performance by tailoring the surface morphology and chemical composition of aluminum alloys

机译：通过调整铝合金的表面形态和化学成分来获得出色的抗腐蚀和摩擦学性能

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摘要

Aluminum alloy surfaces with microano-structures were fabricated via a simple chemical etching (CE) method. After chemical modification with perfluorodecyltriethoxysilane (PFDS), n-octadecyltriethoxysilane (OTS) and aminopropyltriethoxysilane (APS), surfaces with different wettability were obtained. The morphology and chemical elements of the as-prepared surfaces were investigated by atomic force microscopy (AFM), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). In addition, the influence of the surface morphology and chemical modification on the wetting/dewetting properties was investigated. Finally, the anti-corrosion and tribological properties of the as-prepared self-assembled monolayers (SAMs) were characterized using an electrochemical workstation and UMT-3 tribometer. The influence of surface morphology and SAMs on the anti-corrosion and tribological performances is discussed in detail. The results showed that the optimal preparation conditions consisted of a 40% volume fraction of hydrochloric acid with a CE time of 2 min. The corrosion resistance of the surfaces chemically modified with hydrophobic groups was much better than that of those modified with hydrophilic groups. Also, the combination of microano-structures and suitable SAMs on aluminum alloy surfaces could greatly enhance the friction reduction and wear resistance behavior.
机译：通过简单的化学蚀刻（CE）方法制造具有微/纳米结构的铝合金表面。经过全氟癸基三乙氧基硅烷（PFDS），正十八烷基三乙氧基硅烷（OTS）和氨丙基三乙氧基硅烷（APS）的化学改性后，获得了具有不同润湿性的表面。通过原子力显微镜（AFM），扫描电子显微镜（SEM）和X射线光电子能谱（XPS）研究了所制备表面的形貌和化学元素。另外，研究了表面形态和化学改性对润湿/反润湿性质的影响。最后，使用电化学工作站和UMT-3摩擦计对制备的自组装单分子膜（SAMs）的防腐性能和摩擦学性能进行了表征。详细讨论了表面形貌和表面活性物质对耐腐蚀和摩擦学性能的影响。结果表明，最佳的制备条件是由40％的盐酸组成，CE时间为2分钟。用疏水基团化学改性的表面的耐蚀性比用亲水基团改性的表面的耐蚀性好得多。而且，铝合金表面上的微/纳米结构和合适的SAM的组合可以大大增强摩擦降低和耐磨性能。

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