Steel tubes oxidation causes an important problem in Municipal Solid Waste Incinerator plants (MSWI). This work shows a possible solution for this problem through High Velocity Oxygen Fuel (HVOF) thermal spray coatings. A comparison between powder and wire thermal spray coatings (with the same composition) has been done. These optimised coatings have been compared through their microstructure, wear properties (ASTM G99-90, ASTM G65-91), and erosion-corrosion (E-C) resistance. Results of the different EC tests designed in the Thermal Spray Centre, have been evaluated by X Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Disperse Spectroscopy (EDS). Commercial bulk material with similar composition of Ni Based coatings has also been tested. The protection mechanisms of these materials have been assessed after studying the results obtained by HVOF coatings and bulk material. Ni based HVOF coatings are a promising alternative to the MSWI conventional protection against chlorine environments.