Laboratory coal ash corrosion tests

Technical Report · Sat Jul 01 04:00:00 EDT 1989

OSTI ID:5919094

Wolowodiuk, W

In a program to provide complete, reliable corrosion data for selected superheater and reheater tube alloys, Ishikawajima-Harima Heavy Industries Co., Ltd., Tokyo, Japan, conducted materials tests in simulated coal-ash environments. Test coupons were made from 11 base alloys, 7 cladding alloys (typically for coextruded tubes), chromizings, plasma spray coatings, and weld metals. The coupons were coated with synthetic ashes mirroring actual deposits and were exposed to synthetic gas containing sulfur dioxide, oxygen, carbon dioxide, water, and nitrogen. They were exposed for 100 hours at 600 to 750/degree/C (1112 to 1382/degree/F) and then were weighed to determine metal loss. Based on the results of testing, three commercial alloys (Alloy 800H, HR3C, and Tempaloy CR30A) as single-walled tubes and Type 310SS and 35Cr-45Ni as clad or co-extruded tubes are recommended for aggressive, corrosive atmospheres. However, co-extruded tubes are expensive; thus there is an economic advantage to using HR3C and Alloy 800H in the corrosive atmospheres encountered in Phases 0 and 1. Materials are discussed for these advanced boilers as well as for boilers currently experiencing coal-ash corrosion.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (USA); Foster Wheeler Development Corp., Livingston, NJ (USA)
• OSTI ID: 5919094
• Report Number(s): EPRI-GS-6449
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320302 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Materials
36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
AEROSOL WASTES
ALKALINE EARTH METAL COMPOUNDS
ALLOY-NI54CR22CO13MO9
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
ASHES
AUSTENITIC STEELS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
COATINGS
COBALT ALLOYS
CORROSION
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
FLY ASH
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
INCONEL 617
INCONEL ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
IRON COMPOUNDS
IRON SULFATES
MATERIALS
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
OXIDES
OXYGEN COMPOUNDS
RECOMMENDATIONS
RESIDUES
STAINLESS STEEL-310
STAINLESS STEELS
STEEL-CR25NI20
STEELS
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SUPERHEATERS
TEMPERATURE EFFECTS
TRANSITION ELEMENT COMPOUNDS
TUBES
WASTES