(东北大学有色冶金系, 沈阳 110006)
摘 要: 运用X射线衍射、 电子探针、 电化学测试仪和显微 硬度计等实验手段， 着重研究了从酸性KCl-NaCl-AlCl3 熔盐中电镀得到的含锰18%～34%的光亮性Al-Mn合金镀层的表面形貌、 相结构等微观结 构以及镀层的耐蚀性、硬 度、结合力等性能， 同时还考察了热处理对镀层结构和性能的影响。 结果表明， 当锰含量达31%时可获单相非 晶态镀层，单相非晶态镀层的耐蚀性、硬度以及装饰性等性能均优于双相镀层; 与纯 铝相比, Al-Mn合金镀层的点蚀电位高350～450mV, 硬度高4700～5000MPa ； 采用热处理可提高镀层的硬度， 但使其耐蚀性降低, 热处理对镀层性能的影响与镀层本身的相结构变化有关。
关键字: Al-Mn合金 镀层 结构 性能
（Department of Nonferrous Metallurgy, Northeastern University, Shenyang 110006, P. R. China）
Abstract:The microstructures (surface morphology, phase structure, etc) and the properties (corrosion resistance, microhardness, adhesion, etc) of bright Al-Mn alloy coatings electroplated from acidic KCl-NaClAlCl3 molten salt were mainly studied by X-ray diffraction, electronic probe, potentiostat and microhardness meter, etc. The influence of heat treatment on the structure and properties of the Al-Mn Alloy coatings were also investigated. It was shown that the Al-Mn alloy coatings with single amorphous structure can be obtained above 31%(in mass ) Mn content, and the corrosion resistance, hardness as well as decorative properties of single-phase amorphous coatings are superior to those of dual-phase coatings. Relative aluminum, a 350～450 mV increase in pitting potential and 4700～5000MPa raise in microhardness were observed in the single amorphous coatings. Heat treatment to the coatings can enhance their har dness, but can lower their corrosion resistance. The effects of heat treatment on the properties of the coatings is relative to their phase structure transition.
Key words: Al-Mn alloy coating structure property
