Research on the Properties of NiCr-Based Cermet Coatings for Boiler Tube Protection

The goal of this work is to develop a flame sprayed NiCr-Cr₃C₂ coating that resists oxidation, corrosion, and erosion in boiler environments and to assess the influence of Cr₃C₂ fraction and sealing on coating performance. In the experiments, NiCr cermet alloys with different proportions of chromium carbide were applied to boiler steel substrates by means of subsonic velocity flame spraying and some of the coatings were sealed with a silicon resin. The paper describes the various tests performed and presents the results. Paper includes a German-language abstract.