The purpose of research published in this book has been to analyse the erosion-corrosion behavior of substrate boiler tube steel (ASTM A213-T22) and Cr2O3 coating transferred by Plasma thermal spray technique. The temperature erosion and corrosion level of resistance of uncoated and coated T-22 boiler tube steel is examined in simulated laboratory conditions. The complete work completed for this research has been provided in five chapters.