Magnesium and its alloys like AZ91 are used for various automotive, military and aviation applications. Nanocomposite coatings on AZ91 show significant improvement in the surface properties like wear resistance, hardness and corrosion properties. Electroless coatings have unique physicochemical and mechanical properties, for which they are being used increasingly. Most applications of the electroless coatings are based on their wear and corrosion resistance. However, the characteristic like luminescence has a great potential in defence and aerospace applications. In this research, surface roughness of AZ91 magnesium alloy due to nanocomposite coating processes of ENi–B–TiO₂ is experimentally investigated. It has been observed that as concentration of second-phase (TiO₂) particles increases, the surface roughness of coatings also increases.

镁及其合金如AZ91被用于各种汽车，军事和航空应用。AZ91上的纳米复合涂层在表面性能（如耐磨性，硬度和腐蚀性能）方面显示出显着改善。化学镀层具有独特的物理化学和机械性能，因此越来越多地被使用。化学镀层的大多数应用是基于其耐磨性和耐腐蚀性。但是，像发光这样的特性在国防和航空航天应用中具有巨大的潜力。在这项研究中，实验研究了由于ENi–B–TiO _2的纳米复合涂层工艺而导致的AZ91镁合金的表面粗糙度。已经观察到，作为第二相（TiO ₂）颗粒增加，涂层的表面粗糙度也增加。