Fireside corrosion testing of candidate superheater tube alloys, coatings, and claddings -- Phase 2 field testing | Zendy

J. L. Blough | Zendy

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Fireside corrosion testing of candidate superheater tube alloys, coatings, and claddings -- Phase 2 field testing

Author(s) -

J. L. Blough

Publication year - 1996

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/629390

Subject(s) - superheater , boiler (water heating) , metallurgy , corrosion , materials science , coal , alloy , nuclear engineering , waste management , engineering

In Phase 1 of this project, a variety of developmental and commercial tubing alloys and claddings was exposed to laboratory fireside corrosion testing simulating a superheater or reheater in a coal-fired boiler. Phase 2 (in situ testing) has exposed samples of 347, RA85H, HR3C, 253MA, Fe{sub 3}Al + 5Cr, 310 modified, NF 709, 690 clad, and 671 clad for over 10,000 hours to the actual operating conditions of a 250-MW coal-fired boiler. The samples were installed on air-cooled, retractable corrosion probes, installed in the reheater cavity, controlled to the operating metal temperatures of an existing and advanced-cycle, coal-fired boiler. Samples of each alloy are being exposed for 4,000, 12,000, and 16,000 hours of operation. The present results are for the metallurgical examination of the corrosion probe samples after approximately 4,400 hours of exposure

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