Oil ash corrosion of MA956 at high temperatures
- Instituto de Investigaciones Electricas, Morelos (Mexico)
- Programa Corrosion del Golfo de Mexico, Morelos (Mexico)
Alloy MA 956 is an oxide dispersion strengthened iron-base alloy that combines strength and corrosion resistance at high temperatures. This behavior makes it an attractive material for aggressive environments like that prevalent in residual oil-fired boilers. This paper presents an analysis of oil ash corrosion behavior of alloy MA956. For comparison purposes, AISI 446 steel was also tested. The exposed surfaces were studied employing SEM and x-ray microanalysis in order to characterize the microstructural features of the corrosion products after exposure to oil ash deposits at high temperatures. The weight loss results have shown that the corrosion rate of MA 956 alloy in oil ash is strongly dependent on the vanadium content in the deposit. The role of alumina and chromia scales in the corrosion behavior is discussed. Sulfidation was not detected, at least up to 250 hours of testing, when the MA956 alloy was exposed to the sulfated slag.
- OSTI ID:
- 233937
- Report Number(s):
- CONF-950908-; ISBN 0-87170-539-7; TRN: IM9624%%55
- Resource Relation:
- Conference: 2. international conference on heat resistant materials, Gatlinburg, TN (United States), 11-14 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of Heat-resistant materials 2. Conference proceedings of the 2. international conference on heat-resistant materials; Natesan, K. [ed.] [Argonne National Lab., IL (United States)]; Ganesan, P. [ed.] [INCO Alloys International, Inc., Huntington, WV (United States)]; Lai, G.Y. [ed.] [Haynes International, Inc., Kokomo, IN (United States)]; PB: 687 p.
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
02 PETROLEUM
IRON BASE ALLOYS
CORROSION RESISTANCE
FOSSIL-FUEL POWER PLANTS
BOILERS
RESIDUAL FUELS
COMBUSTION
DEPOSITS
OXIDATION
WEIGHT MEASUREMENT
MORPHOLOGY
SCANNING ELECTRON MICROSCOPY
CHEMICAL ANALYSIS
SCALING
TEMPERATURE DEPENDENCE
SULFATES
EXPERIMENTAL DATA