The role of nickel alloys in fighting corrosion in wet limestone FGD systems

Conference · Thu Aug 01 04:00:00 EDT 1996

OSTI ID:272006

Crum, J R; Shoemaker, L E ^[1]; Stiltner, G ^[2]

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1. Inco Alloys International, Inc., Huntington, WV (United States)
2. Inco Alloys International, Inc., Newton, NC (United States)

The inner surfaces and components of wet limestone flue gas desulfurization (FGD) systems are exposed to very aggressive corrosive environments. Temperatures at times approach boiling, acids can concentrate to pH levels less than 1, and chloride concentrations especially in crevice conditions often exceed 100,000 ppm. To resist these ultra-corrosive conditions advanced corrosion resistance nickel alloys are required. Some of the most recently developed alloys offer excellent resistance to environments which have caused excessive corrosion of some of the most corrosion-resistant alloys heretofore available. This paper looks at case histories of some recent applications and compares the performance of several nickel-chromium-molybdenum corrosion-resistant alloys. In addition, the corrosion performance of weldments are evaluated.

• OSTI ID: 272006
• Report Number(s): CONF-960389--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
36 MATERIALS SCIENCE
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
COAL
COMBUSTION
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
FOSSIL-FUEL POWER PLANTS
HASTELLOYS
IMAGES
INCONEL 625
INCONEL ALLOYS
INTERGRANULAR CORROSION
IRON ALLOYS
LIME-LIMESTONE WET SCRUBBING PROCESSES
MOLYBDENUM ALLOYS
NICKEL BASE ALLOYS
PERFORMANCE
POLLUTION CONTROL EQUIPMENT
WELDED JOINTS