• Jasmaninder Singh Grewal
• Saravjot Singh

The power generating plants often experiences the downtime because of the erosion-corrosion in the boiler tubes generally made up of boiler steels in coal based boilers. Replacement and repairing of these tubes is a time consuming process and also quite expensive. After studying the literature it has been observed that nanostructured erosion preventive coatings is the one of the cheaper and effective solution in preventing the erosion of boiler tubes. In this research two different types of coatings namely AlCrN-monolayer and AlCrN-multilayer coatings have been deposited on SS316 using Physical Vapour Deposition (PVD) process. A very uniform layer of these coatings were successfully deposited on the substrates of SS316. These coatings were deposited at a temperature range of 450-500°C. Different properties of the substrates such as roughness of the surface, thermal behaviour, hardness of the coatings and porosity were analysed. The prepared samples were analysed through X- Ray Diffraction (XRD) and Scanning Electron Microscopy/Energy Dispersive Analysis X- Ray (SEM/EDAX) to study the properties of the surface. The aim of this research work is to advance the surface properties of prepared samples to reduce the amount of erosive wear and thus increasing the life. Both uncoated and as-coated substrates were tested in simulated environment by impinging erodent particles at angle of 30° and 90° with a flow rate of 3 g/min. The worn out substrates were again analysed through SEM/EDAX to study the change in properties of the surfaces after experimentation.The rate of erosion was calculated w.r.t loss in weight of the worn out substrates. The substrates coated with multilayer AlCrN coatings experiences lesser erosion of material from the surface than the substrates coated with monolayer coatings as well as uncoated substrates.

Erosion-Corrosion, PVD, SEM/EDAX, Erosive test, XRD, Impingement angle, AlCrN based monolayer and multilayer coatings

"CHARACTERISATION AND BEHAVIOUR OF AlCrN NANO-COATINGS DEPOSITED ON SS316WITH RESPECT TO EROSIVE WEAR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.454-462, May 2019, Available :http://www.jetir.org/papers/JETIRCW06089.pdf

"CHARACTERISATION AND BEHAVIOUR OF AlCrN NANO-COATINGS DEPOSITED ON SS316WITH RESPECT TO EROSIVE WEAR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp454-462, May 2019, Available at : http://www.jetir.org/papers/JETIRCW06089.pdf