Objectives

Metallic components in modern plant may be exposed to reducing conditions which can accelerate corrosion rates. This is largely because of two factors:

• the use of low NO_x burners in modern coal-fired power stations
• advanced designs for incorporating coal gasification into integrated gasification combined cycle power plants.

Corrosion rates are normally accelerated through a sulphidation mechanism and rates can be further accelerated if chlorides are present in the gas streams. The presence of ash and char deposits also acts to alter the atmosphere in contact with the metallic component, thus changing the corrosion rate.

Plant designers must specify plant that operate with a variety of fuels, and thus need guidance about safe working environments. This project collated data previously published as well as generated new data where required to give engineers the tools needed to design safer and more efficient plant.