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High performance alloys for solving severe corrosion problems in flue gas desulfurization systems
Author(s) -
Asphahani A. I.,
Nicholas A. F.,
Silence W. L.,
Meyer T. H.
Publication year - 1989
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19890400702
Subject(s) - alloy , corrosion , flue gas desulfurization , metallurgy , materials science , flue gas , nickel , passivation , waste management , engineering , composite material , layer (electronics)
Nickel‐base alloys have been used as cost‐effective measures in a variety of severely corrosive situations in pollution control units for coal‐fired power plants. Cost‐effectiveness and practical answers to corrosion problems are illustrated (specifically the “wallpaper concept”/metallic lining technique). Numerous cases of successful use of HASTELLOY® alloys in Flue Gas Desulfurization (FGD) system are listed. New developments in nickel‐base alloys and their use in FGD components are discussed. In the Ni‐Cr‐Mo‐W alloy family, C‐22™ alloy has the best resistance to localized corrosion in halide environments (chlorides/fluorides‐containing solutions). The H‐9M™ alloy is the latest development in the Ni‐Cr‐Mo‐Fe alloy family. This alloy has shown superior performance in its resistance to localized corrosion, compared to alloy 625. H‐9M alloy has been tested in several FGD systems and placed in field service. This iron‐containing alloy is an attractive candidate due to its moderate cost.