Corrosion in flue gas desulfurization systems. proceedings of Corrosion/83 Symposium on Performance of Construction Materials in Flue Gas Desulfurization Systems ]and[ Corrosion/84 Symposium on Materials Evaluation and Environmental Effects on Corrosion in Flue Gas Desulfurization Systems / sponsored by National Association of Corrosion Engineers, Unit Committee T-5F on Corrosion Problems Associated with Pollution Control ;