Molten salt attack of alloy 800H and cast stainless steel superheater components resulting from steam-side carryover deposition

Conference · Tue Oct 01 00:00:00 EDT 1996

OSTI ID:379700

Ribble, J P; Esmacher, M J ^[1]

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1. Betz Labs., Inc., The Woodlands, TX (United States)

Three failure analyses involving iron-nickel-chromium alloys (Alloy 800H and niobium modified HP-40) in high temperature steam service 1,300 F to 1,450 F (704 C to 788 C) are presented. Boiler water carryover conditions led to steam-side salt deposits containing sodium, chlorine, and sulfur species. The unique conditions of extremely high temperatures and localized accumulation of aggressive salt species resulted in component failures that involved a molten salt attack mechanism not typically observed in steam-side environments.

• OSTI ID: 379700
• Report Number(s): CONF-960389-; TRN: IM9644%%156
• Resource Relation: Conference: National Association of Corrosion Engineers (NACE) annual corrosion conference and exposition: water and waste water industries, Denver, CO (United States), 24-29 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of Corrosion/96 conference papers; PB: [6615] p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
BOILERS
SUPERHEATERS
CORROSION
INCOLOY 800H
IRON ALLOYS
NICKEL ALLOYS
CHROMIUM ALLOYS
NIOBIUM ALLOYS
MOLTEN SALTS
CORROSIVE EFFECTS
STEAM LINES
CORROSION PRODUCTS
FAILURE MODE ANALYSIS