Preparation and Properties of Graphene/Nickel Composite Coating Based on Textured Surface of Aluminum Alloy
Preparation and Properties of Graphene/Nickel Composite Coating Based on Textured Surface of Aluminum Alloy
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DOI：
10.3390/ma12193240
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发表时间：
2019-10
期刊：
影响因子：
3.4
通讯作者：
Linhong Xu;Ruidong Wang;M. Gen;Luhua Lu;Guangchao Han
中科院分区：
文献类型：
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作者：
Linhong Xu;Ruidong Wang;M. Gen;Luhua Lu;Guangchao Han
本研究对铝合金基体进行了一种新型的复合表面处理，以探索其耐磨性和耐腐蚀性的潜在改善。利用激光加工技术在6065铝合金基体上制备了规则排列的韧窝表面织构（DST）和沟槽表面织构（GST）。然后在浓度为0、0.5、1和1.5 mg石墨烯的电解质中进行Ni和石墨烯/Ni涂层在纹理化表面上的电化学沉积。通过C-PSCN体视显微镜测量的表面形貌如凹坑直径和沟槽宽度表明，石墨烯的加入有助于细化和均匀化涂层。采用电化学腐蚀试验和UMT-Tribo Lab摩擦磨损试验机，在室温干摩擦条件下对复合表面处理层的耐腐蚀性能和耐磨性能进行了测试。电化学腐蚀试验结果表明，试样的耐蚀性与其表面织构有关，韧窝织构能显著提高电极电位等电腐蚀参数。摩擦磨损试验表明，石墨烯含量为1.5 mg的织构化Gr/Ni镀层在垂直摩擦条件下具有最佳的磨损性能，其摩擦系数和磨损痕迹宽度等各项指标均上级其他条件下的试样。
This study carried out a novel duplex surface treatment on aluminum alloy base to explore the potential improvement of wear and corrosion resistance. Regular arrayed dimple surface texture (DST) and groove surface texture (GST) were fabricated by using laser processing on 6065 aluminum alloy matrix (6065Al). Electrochemical deposition of Ni and Graphene/Ni coatings on textured surface was then performed in electrolytes with concentrations of 0, 0.5, 1 and 1.5 mg graphene. Surface morphology such as diameter of dimple and width of groove measured by C-PSCN stereo microscope presents addition of graphene helps to refine and homogenize the coating. Corrosion resistant properties of the duplex surface treatment were examined by electrochemical corrosion tests and wear resistant properties were tested by UMT-Tribo Lab friction and wear tester in a dry sliding condition at room temperature. Electrochemical corrosion tests results show that the corrosion resistance of samples is related to the specific surface texture and the dimple texture can improve the electrical corrosion parameters, such as the electrode potential, greatly. Friction and wear tests show that the textured Gr/Ni electroplating coating with the 1.5 mg graphene content has best wear properties under vertical friction and each index, such as the coefficient of friction and wear trace width, are superior to other conditions of samples.