Abstract: “In this work, Duplex Coating (Plasma Nitriding + PVD Arc TiN coating) as well as non duplex (PVD TiN) coating has been carried out on substrate i.e. Mild Steel (MS). The substrate material was chosen because Mild steel has wide applications especially in Marine Engineering, Oil & Gas Production & Transmission industry as well it is a cost effective material. Surface Characteristics/Properties were investigated on PVD Titanium Nitride (TiN) Coated and Duplex Coated (Plasma Nitrided + PVD TiN) by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Micro Hardness Test and Rockwell Adhesion Test. Duplex coated samples (Plasma Nitrided + PVD TiN coated) showed better Mechanical Properties like Higher Hardness and higher Adhesion strength compared to their non-duplex (PVD TiN coated) counterparts, hence more suitable to be used in Mechanical applications.”

Keywords: Duplex Coating, Plasma Nitriding (PN), Physical Vapour Deposition (PVD), Microhardness, Adhesion