316L不锈钢无机熔融盐电镀铝研究

Electrodeposition of aluminum on 316L stainless steel from inorganic molten salts

在AlC13-NaCl-KCl三元无机熔融盐体系中研究了316L不锈钢基体上熔融盐电镀铝的可能性,并利用扫描电镜、X射线能谱和X射线衍射仪分别对镀层的形貌、成分和结构进行了分析。结果表明,可以通过无机熔融盐电镀的方法在316L不锈钢基体上获得原子百分比达99.32%铝镀层。镀铝层形貌随电流密度变化较为明显,当电流密度低于1.5A.dm-2时,铝镀层呈薄片状生长,随电流密度的增大,镀铝层形貌由片状向粒状过渡,并伴随着晶粒的细化。铝镀层厚度随电镀时间增加而线性增加。

The feasibility of electrodeposited aluminum on 316L stainless steel from AlCl3-NaCl-KCl inorganic molten salts was studied. The surface morphologies, composites and microstructures of the aluminum films were characterized by scanning electron microscopy, energy dispersive spectrum and X-ray diffraction individually. The results show that the aluminum layer contains 99.32 at% A1 can be obtained on 316L stainless steel from the inorganic molten salts. The surface morphology changes obviously with the variation of the current density. When current density lower than 1.5A. dm-2, the aluminum is deposited in the form of a flaky, with the increasing of the current density, the form of the aluminum layer changes from flake to graininess. And at the same time, the size of the grains decreases. It is also shown that the thickness of the deposited aluminum layer linearly increases with the increasing of the electro- deposition time.