Experimental Study of Surface Roughness of AZ91 Magnesium Alloy after ENi-B-TiO2 Electroless Nano Composite Coating

Authors

  • Dr. F B Sayyad, Dr. Rohan Senanayake

Abstract

A coating is a covering that is applied to the surface of an object, usually referred to as the substrate or specimen. The purpose of applying the coating may be either decorative, functional, or a combination of both. The magnesium (Mg) and its alloys possess low density, high specific stiffness and electromagnetic shielding property, which are attractive to use this material for the various industrial components. Surface roughness and hardness is a serious drawback of Mg alloys, restricting their practical applications. Electro-less Nano Coating is one of the effective techniques for improvement in these material properties. In this paper, experimental investigation on surface roughness of AZ91 Magnesium Alloy due to Nano composite coating processes of ENi-B-TiO2 are investigated. The detailed investigation along with experimental analysis, of the possibility of improving the deposit efficiency and properties of the composite deposits, by developing a suitable bath composition and operating conditions, would be worthwhile attempt. It has been observed that as concentration of second-phase (titanium) particles increases, the surface roughness of coatings also increases. The optimum value of concentration of second-phase (titanium) particles and bath agitation is also investigated for obtaining better surface roughness after Nano coating.

Keywords- Coatings; Nano Composite; Surface roughness; AZ91 Mg Alloy; Electroless

Published

2020-12-31

Issue

Section

Articles