Oxidation Behaviour of Plasma Sprayed Carbon Nanotubes-Alumina Coated ASME-SA213-T291 Boiler Tube Steel

Abstract

In this research work, oxidation behaviour of Carbon Nanotubes reinforced Al2O3 coated ASME-SA213-T91 boiler tube steel specimens were investigated at 900°C temperature in air. The different CNTs-Alumina composite coatings were deposited using plasma spray technique and NiCr was used as bond coat before applying CNTs-Al2O3 coatings. The hot corrosion studies were conducted on all coated specimens in air at 900°C under cyclic conditions. The thermogravimetric technique was used to establish kinetics of corrosion. X-ray diffraction (XRD) and scanning electron microscopy/energy-dispersive x-ray analysis (SEM/EDAX), Xray mapping techniques were used to analyse the corrosion products. The CNTs reinforced Alumina coatings enhance resistance to corrosion significantly.  

Cite this Article Rakesh Goyal, Buta Singh Sidhu, Vikas Chawla. Oxidation Behaviour of Plasma Sprayed Carbon Nanotubes-Alumina Coated ASME-SA213-T291 Boiler Tube Steel. Journal of Materials & Metallurgical Engineering. 2017; 7(3): 1–15p.