Corrosion and degradation of test materials in the BI-GAS coal-gasification pilot plant

Technical Report · Mon Feb 01 04:00:00 EST 1982

OSTI ID:6787269

Yurkewycz, R; Firestone, R F

Corrosion monitoring of test materials was conducted in the BI-GAS coal gasification pilot plant from 1976 through 1981. Montana Rosebud subbituminous coal was processed at pressures of 750 psia (5175 kPa). Metals were exposed at low to moderate temperatures (700/sup 0/F (371/sup 0/C)) in the coal preparation area, gasifier slag quench, and the product gas scrubbing system. Refractories and metals were evaluated in the gasifier high temperature (1372/sup 0/F (744/sup 0/C)-1915/sup 0/F (1046/sup 0/C)) test sites at the top of stage II. In the moderate temperature aqueous environments, alloys 26-1, Types 329, 304, 316, 405, and IN-825 were superior in performance to Monel 400, carbon steel A515, and 2-1/4Cr-1Mo. Stress corrosion cracking was not observed in welded U-bend samples (A515, 304, 316, 329, 26-1). First-exposure gasifier corrosion test results generally indicated that uncoated alloys with 23.0 to 26.2 wt % Cr and less than 30 wt % Ni exhibited the best performance. Alloy Types 446 and 310 experienced the least corrosion attack with linear corrosion rates less than 20 mpy (0.51 mm/y); marginal performing alloys were Type 314, 22-13-5, and RA-333. During the second exposure, all uncoated alloys incurred acceptable corrosion losses. Alloys with Co, Cr, and Ni (N155, 556) in approximately equal proportions, at concentrations of approx. 20 wt %, ranked higher in performance than alloys such as Type 310, IN-800, Cru-25, and RA-333. Gasifier exposure of pack-aluminized alloys IN-800(A1) and Type 310(A1)showed that the coating provided corrosion protection. Cracks in the bulk coating were filled with Fe-Al rich oxides. The refractories were changed very little by exposure with two exceptions: tar was removed from a tar-impregnated brick, and a lightweight insulating castable deteriorated greatly.

• Research Organization: IIT Research Inst., Chicago, IL (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6787269
• Report Number(s): IITRI-M-06087-E; ON: DE83001432
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ALLOY-RA-333
ALLOYS
BI-GAS PROCESS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
CHROMIUM-NICKEL STEELS
COAL GASIFICATION
COATINGS
COBALT ALLOYS
COPPER ALLOYS
CORROSION
CORROSION PROTECTION
CORROSION RESISTANT ALLOYS
DATA
EXPERIMENTAL DATA
FUNCTIONAL MODELS
GASIFICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCOLOY 800
INCOLOY 825
INCOLOY ALLOYS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
MATERIALS
MATERIALS TESTING
MOLYBDENUM ALLOYS
MONEL 400
NICKEL ALLOYS
NICKEL BASE ALLOYS
NUMERICAL DATA
PILOT PLANTS
PROTECTIVE COATINGS
REFRACTORIES
SILICON ALLOYS
STAINLESS STEEL-304
STAINLESS STEEL-316
STAINLESS STEEL-329
STAINLESS STEEL-405
STAINLESS STEEL-446
STAINLESS STEELS
STEELS
TESTING
THERMOCHEMICAL PROCESSES
TITANIUM ALLOYS
TUNGSTEN ALLOYS