Materials testing in a gas turbine operating on coal-derived gas

Technical Report · Sun Nov 01 04:00:00 EST 1992

OSTI ID:6810577

White, R J; Lyell, G D ^[1]

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1. Rolls-Royce Industrial and Marine Gas Turbines Ltd., Coventry (United Kingdom)

An aero derived gas turbine engine, the Olympus SK30 ran for 1166 hours on coal derived (slagger) gas at the British Gas site at Westfield, Fife, Scotland. Slagger gas is low in calorific value and high in sulphur content. A rainbow'' HP turbine assembly, with a range of corrosion protective overlay coatings on both the vanes and blades was installed to evaluate the protection offered by the various coatings against the highly sulphurous slagger gas. A detailed metallurgical inspection was carried out on a random selection of the coated vanes and blades. None of the components examined showed evidence of any serious erosion. It was concluded that the operating time was too short to cause extensive damage to the coatings. However, the various coatings showed different degrees of degradation and may be ranked as follows: 1. Platinum Aluminide, LDC-2E, 2. Platinum Aluminide, RT22A, 3. Pack Aluminide, 4. EB-PVD* Coating Co-29Cr-5Al-O.34Y, GT-29, 5. EB-PVD* Coating Co-23Cr-lOA1-0.34Y, BC-21 Electron Beam-Plasma Vapour Deposit.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States); Rolls-Royce Industrial and Marine Gas Turbines Ltd., Coventry (United Kingdom)
• Sponsoring Organization: EPRI; Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 6810577
• Report Number(s): EPRI-TR-101642
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
20 FOSSIL-FUELED POWER PLANTS
200100* -- Fossil-Fueled Power Plants-- Power Plants & Power Generation
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
CHALCOGENIDES
COAL GASIFICATION
COATINGS
COMPARATIVE EVALUATIONS
CORROSIVE EFFECTS
EPRI
EQUIPMENT
EVALUATION
GAS TURBINES
GASIFICATION
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INSPECTION
MACHINERY
MATERIALS
MATERIALS TESTING
SULFIDES
SULFUR COMPOUNDS
TESTING
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY