EFFECT OF JP-5 SULFUR CONTENT ON HOT CORROSION OF SUPERALLOYS IN MARINE ENVIRONMENT
Abstract
An exploratory program was made to provide a basis for a subsequent factorial experiment to determine whether the maximum sulfur content of 0.40 weight per cent, currently allowed in grade JP-5 aviation turbine fuel, is a safe level for the protection of turbine blade alloys used in high-performance engines. Specimens of six different superalloys mounted in a cascade holder were exposed to vitiated air from the Phillips 2-inch combustor during a five hour cyclic test. Operating conditions were varied to investigate the effect of gas temperature, pressure and velocity at the test specimens, combustor air-fuel ratio, sea salt ingestion rate, and test specimen position in the cascade. Evaluations were based upon metal loss, scale analysis and metallographic examination of the test specimens. The desirability of two experiments was shown; one at gas temperatures of 1800 F and above, where fuel sulfur inhibited hot corrosion, and the other below the melting point of sodium sulfate (1623 F), where fuel sulfur accelerated hot corrosion. Analysis of the data obtained indicates that the effects of other test variables on hot corrosion is a function of mass exposure to 'sea salt' and fuel sulfur.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 1964
- Accession Number
- AD0610196
Entities
People
- H. T. Quigg
- R. M. Schirmer