Corrosion Behaviour of Various Superheater Steels in Cleaning Solutions

Abstract

In recent years, with the increase in the national power supply demand, a large number super-critical units have been put into production in thermal power plants. The high-parameter units of thermal power plants have generally participated in peak shaving, and the working conditions have changed greatly. The over-temperatures, squibs and turbine blade rushes caused by superheater scales are becoming increasingly serious and widespread. Adapting superheater oxide skin chemical cleaning technology to new production conditions is an effective way to solve this problem. In this paper, the corrosion behaviour of various steels used for boiler superheaters in aqueous chemical cleaning is investigated.