Flue-gas desulfurization includes the process of removing sulfur dioxide (SO2) from the exhaust flue gasses being emitted by thermal power plants and from other sulfur oxide emitting processes.

During the FGD process in the wet scrubber, flue gasses flow through the chimney of the scrubber and corrosion may occur. For efficient and effective flue-gas desulfurization in the scrubber, titanium clad steel plates act as the perfect construction material for the internal cylinder of the chimney.

Therefore, chimneys are externally coated with cement but internally coated with titanium clad steel plates to prevent corrosion and for smooth running of the FGD process.