5083铝合金喷洒式微弧氧化局部膜层的制备及性能

发布时间：2018-06-26 05:20

本文选题：铝合金 + 微弧氧化　；参考：《中国表面工程》2015年05期

【摘要】：以传统浸入式微弧氧化为参照对象,利用自行研制的喷洒式微弧氧化装置在5083铝合金表面局部区域制备一层氧化膜,考察厚度、硬度、粗糙度和电流随时间的变化规律,通过三维形貌仪,扫描电子显微镜(SEM),X射线衍射仪(XRD)分析膜层的微观形貌和组织结构,并在电化学工作站中评价其腐蚀性能,由此比较浸入式和喷洒式微弧氧化的异同,从而证明喷洒式微弧氧化的可行性。结果表明:浸入式和喷洒式微弧氧化制备的膜层相近。其中,膜层厚度、硬度、粗糙度以及电流都随时间呈规律性变化;两者膜层表面不平整,大部分是O和Al元素,主要由γ-Al2O3构成;膜层的电化学性能较铝合金基体都明显改善。因此,在不宜采用浸入式处理方法的环境下,可采用喷洒式微弧氧化代替。
[Abstract]:Taking the traditional immersion micro-arc oxidation as the reference object, a layer of oxide film was prepared in the local area of the surface of 5083 aluminum alloy by using the self-developed spray micro-arc oxidation device. The changes of thickness, hardness, roughness and current with time were investigated. The microstructure and microstructure of the films were analyzed by means of three-dimensional topography and scanning electron microscopy (SEM) X-ray diffraction (XRD). The corrosion properties of the films were evaluated in an electrochemical workstation, and the similarities and differences between immersion and spray micro-arc oxidation were compared. Thus, the feasibility of spraying micro-arc oxidation is proved. The results show that the films prepared by immersion and spray arc oxidation are close to each other. Among them, the thickness, hardness, roughness and current of the film all change regularly with time, the surface of the film is not smooth, most of them are O and Al elements, mainly composed of 纬 -Al _ 2O _ 3, and the electrochemical properties of the film are obviously improved compared with the aluminum alloy substrate. Therefore, spraying micro-arc oxidation can be used instead of immersion treatment.
【作者单位】：装甲兵工程学院装备维修与再制造工程系;
【基金】：装备预先研究项目(51327040101)
【分类号】：TG174.4

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