HR-2钢表面阴极微弧电沉积氧化铝陶瓷涂层的组织结构及其性能研究

发布时间：2018-03-07 20:53

本文选题：HR-钢　切入点：阴极微弧电沉积　出处：《材料导报》2015年S2期 　论文类型：期刊论文

【摘要】：以0.8mol·L-1 Al(NO3)3·9H2O的乙醇溶液为电解液,用阴极微弧电沉积的方法在HR-2钢表面制备出厚度约为69μm的氧化铝陶瓷涂层,通过扫描电子显微镜(SEM)观察了涂层的表面和截面形貌,通过X射线能量色散谱(EDS)及X射线衍射仪(XRD)分析了涂层的成分以及相组成,通过电化学综合测试系统分析了涂层的电化学腐蚀性能,结果表明:涂层表面粗糙多孔,与基体呈犬牙咬合状结合;涂层主要由α-Al2O3和γ-Al2O3组成;涂层中含有少量的Fe元素,表明膜/基界面附近的基体在微弧放电的作用下也参与了成膜;沉积氧化铝涂层后,样品的腐蚀电流密度降低了1个数量级,耐腐蚀性能得到提高。
[Abstract]:Alumina ceramic coatings with thickness of about 69 渭 m were prepared on the surface of HR-2 steel by cathodic micro-arc electrodeposition with the ethanol solution of 0.8mol 路L -1 Al(NO3)3 路9H2O as electrolyte. The surface and cross-section morphology of the coating were observed by scanning electron microscopy. The composition and phase composition of the coating were analyzed by X-ray energy dispersive spectroscopy (EDS) and X-ray diffractometer (XRD). The electrochemical corrosion performance of the coating was analyzed by electrochemical comprehensive test system. The results showed that the coating surface was rough and porous. The coating consists mainly of 伪 -Al _ 2O _ 3 and 纬 -Al _ 2O _ 3. The coating contains a small amount of Fe, which indicates that the substrate near the film / substrate interface is also involved in the formation of film under the action of micro-arc discharge. The corrosion current density of the sample was reduced by one order of magnitude, and the corrosion resistance was improved.
【作者单位】：表面物理与化学重点实验室;中国工程物理研究院;
【分类号】：TG174.4

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