Degradation of materials due to solid particle erosion is encountered in a variety of engineering industries, either at room temperature or elevated temperatures. Nickel-based coatings are commonly used in applications where wear resistance, combined with oxidation or hot corrosion resistance, is required. In the present work, and metallic coatings were deposited on an iron-based superalloy by a shrouded plasma spray process. The coatings were characterized by scanning electron microscopy, optical microscopy, microhardness testing, and x-ray diffractometry. Erosion studies were conducted using an air-jet erosion test rig at a velocity of and impingement angles of 30 and . Scanning electron microscopy was used to analyze the eroded surfaces. 3D surface roughness profiles of the eroded samples were taken using a Veeco Optical Profilometer. coatings had slightly lower average porosity and lower microhardness as compared to coatings. The observed erosion rate of the coatings, however was lower than that of the coatings at both 30 and impingement angles. coating had shown higher erosion rate at impingement angle than that at , whereas the effect of impingement angle on the erosion rate is negligible for plasma sprayed coating. The higher bond strength of coating might be one of the major contributing factors for lower erosion rate of coating as compared to coating under the tested conditions. Erosion mechanisms of plasma sprayed coatings are discussed.