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

Technical Report · Sun Aug 01 04:00:00 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
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANT ALLOYS
DATA
DESULFURIZATION
DUCTS
EQUIPMENT
EXPERIMENTAL DATA
FLUE GAS
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
HASTELLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCONEL 625
INCONEL ALLOYS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
LIME-LIMESTONE WET SCRUBBING PROCESSES
LINERS
MATERIALS
MATERIALS TESTING
METALLOGRAPHY
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PITTING CORROSION
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
RECOMMENDATIONS
SCRUBBERS
SCRUBBING
STAINLESS STEELS
STEELS
STRESS CORROSION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TANTALUM ALLOYS
TESTING
THERMAL POWER PLANTS
TITANIUM ALLOYS
WASTES