In power stations as well as in waste incineration plants, the stack is the last component in which residues and condensates can separate from the treated flue gas. The process of condensate formation due to temperatures below dewpoint, and the extreme corrosiveness of specific condensates are discussed in detail. Stack lining, using an appropriately corrosion-resistant metallic material, has proven to be an effective means of corrosion protection, Selected high-alloy stainless steels and nickel-base alloys, particularly well suited to this application, are introduced. The various techniques available for fitting such highly corrosion resistant linings are described in selected case histories.
Key words: stack lining,breeching, corrosion resistant, Structural materials, fabrication, welding, wallpapering, roll-cladding, electro-cladding, power station, start-up, shut-down, dewpoint, flue gas
condensation, economics