目的 研究石墨烯纳米片对D16T铝合金耐磨耐蚀性的影响，为铝合金表面微弧氧化处理技术在油气领域的应用提供理论依据。方法 利用微弧氧化技术在含与不含石墨烯的电解液中在D16T铝合金表面制备微弧氧化膜层，采用XRD、SEM、EDS分析了膜层相结构和表面形貌，测试了膜层的粗糙度和显微硬度，通过摩擦磨损和电化学实验研究了石墨烯纳米片对D16T铝合金微弧氧化膜耐磨性和耐蚀性的影响。结果 微弧氧化膜层主要由α-Al2O3和γ-Al2O3相组成，石墨烯的添加使Al2O3相的衍射峰值和衍射峰的数量增加，Al衍射峰明显降低；膜层表面平整，表面熔融颗粒较少，表面有大块团聚物堆积。膜层由外部疏松层和内部致密层组成，疏松层微孔数量和微裂纹较少，膜层厚度稍有增加，致密层厚度由不含石墨烯时的0.6 μm增至1.6 μm。含石墨烯的膜层容抗弧半径明显增加，Bode图中低频阻抗值由5′105 Ω×cm2提升至106 Ω×cm2，疏松层电阻由1.57′105 Ω×cm2增至1.98′105 Ω×cm2，致密层电阻由3.07′105 Ω×cm2提升至1.24′106 Ω×cm2；膜层自腐蚀电位由-0.53 V提高至-0.41 V，自腐蚀电流密度由3.15′10-7 A/cm2降低至3.97′10-8 A/cm2；膜层质量磨损量明显降低，摩擦系数减小，耐磨性增加。结论 石墨烯纳米片通过放电通道进入膜层填充膜层中的孔和裂纹，部分石墨烯形成团状覆于膜层表面，使膜层更加平整、致密，膜厚增加，膜层耐磨性和耐蚀性得到明显提升。

The work aims to study effect of graphene on the wear and corrosion resistance of D16T aluminum alloy was studied, which provided a theoretical basis for the application of micro-arc oxidation treatment technology on the surface of aluminum alloy used in oil and gas field. The micro-arc oxidation films were prepared on the surface of D16T aluminum alloy in the electrolyte with and without grapheme by micro-arc oxidation technology. The phase structure and surface morphology of the films were analyzed by XRD, SEM and EDS. The roughness and micro-hardness of the films were tested. Effects of graphene nanosheets on the wear and corrosion resistance of D16T aluminum alloy MAO films were investigated by wear and chemical experiments. The micro-arc oxidation coating is mainly composed of α-Al2O3 and γ-Al2O3 phases. The diffraction peak and peak number of Al2O3 phase obviously increase and the diffraction peak of Al decreases significantly due to the addition of graphene nanosheets. The surface of the film is flat and the molten particles on the surface are less. A large number of agglomerates are accumulated. The film is consistent of an outer loose layer and an inner dense layer. The number of the micropores and microcracks in the loose layer are less, and the thickness of the films lightly increases. The thickness of the dense layer increases from 0.6 μm thickness of the coating without graphene nanosheets to 1.6 μm. The resistive arc radius of the film with graphene nanosheets is obviously increased. The low-frequency impedance value in the Bode diagram increased from 5′105 Ω×cm2 to 106 Ω×cm2. The resistance of the loose layer increased from 1.57′105 Ω×cm2 to 1.98′105 Ω×cm2, and the resistance of the dense layer increased from 3.07′105 Ω×cm2 to 1.24′106 Ω×cm2. The self-corrosion potential of the film increased from -0.53 V to -0.41 V, and the self-corrosion current density reduced from 3.15′10-7 A/cm2 to 3.97′10-8 A/cm2. The wear amount of the film quality is significantly reduced. The friction coefficient of the film is reduced, and the wear resistance is improved. Graphene nanosheets entered into the coating through the discharge channel and filled the holes and cracks in the coating. Parts of the graphene nanosheets formed a cluster and covered the surface of the coating. That made the coatings moother and denser, and the thickness of the film was increased, and the wear resistance and corrosion resistance of the film were significantly improved.