Cause and risk evaluation for high-temperature chlorine corrosion

Abstract

The damage of heat exchanger surfaces in steam generators in incineration plants for waste and biomass by high-temperature chlorine corrosion has been known for a long time. The use of alternative fuels in coal-fired boilers causes similar reaction conditions as known in waste incineration facilities. Thermodynamical calculations can supply parameters, which enable to assess the corrosion potential. Plant concept and plant operation are of major importance for corrosion rates. Experiences on difficult operational conditions are provided. (orig.)