The blockage and burst failure of steam tubes caused by exfoliated oxide scales is the major risk faced by supercritical boiler in thermal power generations. With the development of advanced ultra-supercritical thermal power technology

especially

more severe oxidation scale problems will carry over into the higher steam parameters thermal power plants. High temperature coating technology shows a new research methods and approaches in solving exfoliated oxide scale problems. It can not only satisfy the performance requirements of heat resistant steel to high temperature steam oxidation resistant in harsh service environment

but also release the temperature limit of currently used heat-resistant steels due to its inadequate oxidation resistance

which has great application potential in the energy sector. The RD plans of steam oxidation resistant coatings for steam flow parts of ultra-supercritical thermal power units in the EU

the United States and China are briefly described. The current research progress in preparation and service performance of these coatings is emphatically introduced. The basic research and engineering application issues restricting the large-scale application of aluminide coatings in thermal power units are proposed. And the application prospect of high temperature aluminide coating technology for complex heatresistant steel tubes of ultra-supercritical power plant boiler is prospected.