Long Term Materials Test Program. Quarterly report, July-September 1983

Technical Report · Sun Apr 01 00:00:00 EST 1984

DOI:https://doi.org/10.2172/6736046· OSTI ID:6736046

Corrosion and erosion/corrosion testing of gas turbine vane and blade base alloys and a variety of protective coating systems under the Long Term Materials Test program has surpassed 3400 hours. The PFBC facility at Malta, New York continues to show an exceptionally high degree of reliability and consistency in performance. Operating conditions include a 1650/sup 0/F bed temperature at 10 atmospheres pressures utilizing Pittsburgh No. 8 coal and a low alkali dolomite sulfur sorbent. After 2687 hours, unprotected nickel and cobalt base vane and blade alloys generally experienced corrosion rates of 1 to 2 mils/1000 hours at metal temperatures of 1100, 1300, and 1500/sup 0/F. Precious metal aluminide and MCrAlY coatings continue to show excellent corrosion resistance (<0.5 mils/1000 hrs) at 1500/sup 0/F, but are susceptible to varying degrees of pitting attack at 1100/sup 0/ and 1300/sup 0/F. Erosion/corrosion degradation rates at 800 to 900 fps., 1350/sup 0/F and less than 100 ppM dust loading ranged from 1 to 4 mils/1000 hours with corrosion predominately concentrated in areas of particle impaction indicating an erosion/corrosion synergism.

• Research Organization: General Electric Co., Schenectady, NY (USA). Advanced Energy Programs Dept.
• DOE Contract Number: AC21-79ET15457
• OSTI ID: 6736046
• Report Number(s): DOE/ET/15457-1560; ON: DE84012070
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
36 MATERIALS SCIENCE
COBALT BASE ALLOYS
CORROSION
FLUIDIZED-BED COMBUSTORS
MATERIALS TESTING
GAS TURBINES
NICKEL BASE ALLOYS
TURBINE BLADES
COAL
EROSION
PROTECTIVE COATINGS
ALLOYS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COATINGS
COBALT ALLOYS
COMBUSTORS
ENERGY SOURCES
FOSSIL FUELS
FUELS
MACHINERY
MATERIALS
NICKEL ALLOYS
TESTING
TURBINES
TURBOMACHINERY
421000* - Engineering- Combustion Systems
360105 - Metals &amp; Alloys- Corrosion &amp; Erosion