Fire-side corrosion in refuse-fired boilers

Journal Article · Sun May 01 04:00:00 EDT 1988 · Mater. Performance; (United States)

OSTI ID:6904805

Daniel, P L; Paul, L D; Barna, J

This paper reviews corrosive conditions in refuse-fired boilers and describes laboratory tests that define the relative corrosiveness of salts found in boiler deposits. Constituents of the salt mixtures tested include ZnCl/sub 2/, PbCl/sub 2/, FeCl/sub 2/, NaCl, KCl, ZnSO/sub 4/, PbSO/sub 4/, Na/sub 2/SO/sub 4/, and K/sub 2/SO/sub 4/. The corrosiveness of the salt mixtures was determined by measuring the corrosion rates of SA-178 Grade C carbon steel and SA-213 TP-304 stainless steel (SS) at 500 and 1050 F (260 and 566 C). The tests were 720-h long. The tests identified corrosive species and mechanisms that may be operative in refuse-fired boilers. At 1050 F (566 C), lead is extremely corrosive to the SS. Mixtures of NaCl + KCl, previously thought to be noncorrosive to furnace-wall tubes at 500 F (260 C), become corrosive (especially to SS) when they mix with FeCl/sub 2/, which forms as a corrosion product on steel surfaces. Carbon steel at a furnace-wall tube temperature of 500 F (260 C) is attacked most rapidly by salt mixtures containing ZnCl/sub 2/. Sulfates appear to inhibit these corrosion processes somewhat.

• Research Organization: Alliance Research Center, Babcock and Wilcox, 1562 Beeson St., Alliance, OH (US)
• OSTI ID: 6904805
• Journal Information: Mater. Performance; (United States), Journal Name: Mater. Performance; (United States) Vol. 27:5; ISSN MTPFB
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
ALKALI METAL COMPOUNDS
ALLOYS
BOILERS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
HALIDES
HALOGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
IRON CHLORIDES
IRON COMPOUNDS
LEAD CHLORIDES
LEAD COMPOUNDS
LEAD HALIDES
LEAD SULFATES
OXYGEN COMPOUNDS
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
POTASSIUM SULFATES
REFUSE-FUELED BOILERS
SODIUM CHLORIDES
SODIUM COMPOUNDS
SODIUM SULFATES
STAINLESS STEELS
STEELS
SULFATES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZINC CHLORIDES
ZINC COMPOUNDS
ZINC HALIDES
ZINC SULFATES