Accession Number : AD0881903

Title :   Effect of Sulfur in JP-5 Fuel on Hot Corrosion of Turbine Blade Materials in Marine Environment.

Descriptive Note : Final rept. 16 May-16 Nov 70,

Corporate Author : PHILLIPS PETROLEUM CO BARTLESVILLE OK RESEARCH AND DEVELOPMENT DEPT

Personal Author(s) : Quigg, H. T. ; Schirmer, R. M. ; Bagnetto, L.

Report Date : JAN 1971

Pagination or Media Count : 207

Abstract : An experimental investigation is being conducted to determine the magnitude of the reduction in fuel sulfur required to improve the durability of turbine-blade materials in high performance engines operated in a marine environment. Previous studies by Phillips for the Navy have shown that little or no benefit would result from lowering the sulfur limit to 0.04 weight per cent, which approaches the median of current production for JP-5; however, hot corrosion was decreased significantly for most materials tested by use of an essentially sulfur-free fuel containing 0.0004 weight per cent. This study was made to establish whether that improvement in durability is associated with a 'threshold' concentration of sulfur in fuel. The work was done using Phillips Turbine Simulator operated at 15 atmospheres pressure with gas temperature and velocity at the test specimens cycled from 1000 to 2000 F and 163 to 275 ft/sec by control of fuel flow. Sea water was added at a concentration equivalent to 1 ppm sea salt in the inlet air. Specimens of 13 different superalloys and 20 different superalloy-coating systems were exposed from 5 to 165 hours using a fuel containing 0.0040 weight per cent sulfur, in an experiment designed to permit direct comparisons with previous test using fuel containing 0.040 and 0.0004 weight per cent sulfur. (Author)

Descriptors :   *CORROSION), (*TURBINE BLADES, (*JET ENGINE FUELS, SULFUR), NICKEL ALLOYS, COBALT ALLOYS, METAL COATINGS, ALUMINUM, CAPTIVE TESTS, SEA WATER, FUEL ADDITIVES.

Subject Categories : Fuels
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE