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Preparation and Properties of Graphene/Nickel Composite Coating Based on Textured Surface of Aluminum Alloy

1
School of Mechanical Engineering and Electronic Information, China University of Geosiences (Wuhan), Wuhan 430074, China
2
Xiamen San-vision Company Limited, Xiamen 361101, China
*
Author to whom correspondence should be addressed.
Materials 2019, 12(19), 3240; https://doi.org/10.3390/ma12193240
Received: 11 August 2019 / Revised: 29 September 2019 / Accepted: 1 October 2019 / Published: 3 October 2019
(This article belongs to the Section Advanced Composites)
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. View Full-Text
Keywords: surface texture; composite electroplating; graphene/nickel; electrochemical corrosion; friction and wear surface texture; composite electroplating; graphene/nickel; electrochemical corrosion; friction and wear
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MDPI and ACS Style

Xu, L.; Wang, R.; Gen, M.; Lu, L.; Han, G. Preparation and Properties of Graphene/Nickel Composite Coating Based on Textured Surface of Aluminum Alloy. Materials 2019, 12, 3240.

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