Materials testing in simulated flue-gas-desulfurization-duct environments. Final report

Technical Report · Sun Aug 01 00:00:00 EDT 1982

OSTI ID:6811198

Koch, G H; Beavers, J A

Corrosion of construction materials is a major cause of poor reliability and high costs associated with flue gas desulfurization systems. In particular, the outlet ducts which carry cooled scrubbed gas from the scrubber to the stack suffer severe corrosion. Accordingly, the Electric Power Research Institute (EPRI) has asked Battelle to evaluate alloys and linings in simulated outlet duct environments. Of the alloys tested, the nickel-based alloys HASTELLOY C-276, INCONEL 625, HASTELLOY G, and the iron-based alloy AL 6X, showed none or very little pitting; this resistance was attributed to their high molybdenum content. Also, titanium was found to be very resistant to the wet acidic environments. Significantly, the ferritic stainless steel Monit, which is a low cost material containing only 4.1 weight percent molybdenum, exhibited high resistance against pitting and uniform corrosion. The 300 series stainless steels showed deep pits and high corrosion rates. Generally, the linings showed good resistance under continuous exposure to the relatively low temperature wet acidic environments. However, a major shortcoming of the linings was found to be the lack of resistance to temperature upsets.

• Research Organization: Battelle Columbus Labs., OH (USA)
• OSTI ID: 6811198
• Report Number(s): EPRI-CS-2537; ON: DE82906485
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
36 MATERIALS SCIENCE
DUCTS
CORROSION
MATERIALS
MATERIALS TESTING
FLUE GAS
DESULFURIZATION
SCRUBBERS
EXPERIMENTAL DATA
FOSSIL-FUEL POWER PLANTS
HASTELLOYS
INCONEL 625
LIME-LIMESTONE WET SCRUBBING PROCESSES
LINERS
METALLOGRAPHY
MOLYBDENUM ALLOYS
NICKEL BASE ALLOYS
PITTING CORROSION
RECOMMENDATIONS
STAINLESS STEELS
STRESS CORROSION
SULFUR DIOXIDE
TITANIUM ALLOYS
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
DATA
EQUIPMENT
GASEOUS WASTES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCONEL ALLOYS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
NICKEL ALLOYS
NIOBIUM ALLOYS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
SCRUBBING
STEELS
SULFUR COMPOUNDS
SULFUR OXIDES
TANTALUM ALLOYS
TESTING
THERMAL POWER PLANTS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
360105 - Metals & Alloys- Corrosion & Erosion