Improvisation of austenitic aisi 316l Steel surface using rice husk and#913; si3n4 ni p composite coating for Engineering applications

Abstract

In electroless plating of austentitic steel composite coatings, primary Ni-P and secondary Si3N4 coating materials were developed to increase coating features and mechanical properties. The Taguchi L9 orthogonal array format was used to optimise the findings using the grey relational approach. Taguchi optimization was utilised to optimise input process factors such as immersion duration, coating temperature, and reinforcement ratio in order to maximize tensile strength, adhesion strength, and hardness, wear and abrasion resistance. The mechanical, adhesion and wear results showed higher values in lower immersion time. Extremely lengthy immersion cycles have a moderate influence on mechanical characteristics and wear resistance due to the production of coated molecular grains. This is owing to high brittleness caused by Si and N hyper saturation. The ringer and Hank s corrosion study confirmed that long immersion time of substrate fetched significant coating thickness and lesser current potential. The Bode, Nyguist and Tafel plots confirmed the improvd corrosion resistance of steel. Among all composition the long immersion and high reinforcement ratio outperformed well. The surface roughness of low immersion cycle coated SS-316L steel produced lower surface roughness than the lengthy coating cycle. A lowest surface roughness of 17and#956;m was observed for 300min immersion time newline