ENVIRONMENTAL EFFECTS ON THE HIGH TEMPERATURE CORROSION OF SUPERALLOYS IN PRESENT AND FUTURE GAS TURBINES

Effects of temperature and contaminant levels on the high-temperature corrosion of superalloys used in gas turbines were investigated using pressurized passages which simulate the operating conditions of present-day gas turbines. The alloys were tested in a cooled configuration realistically simulating the air-cooled vanes and blades of a gas turbine. Conclusions are drawn as to the permissible level of contaminants and the effect of metal cooling on high-temperature corrosion. It is shown that the surface temperature of a blade or vane rather than the gas-stream temperature is the critical factor in determining the amount of attack to be expected at a given contaminant level and the amount of attack is an exponential function of this temperature. Furthermore, in a dynamic-type test no decrease in corrosion rate is noted at higher temperatures. It was concluded that the use of a 5 ppm V fuel would result in an excessive amount of attack with a metal surface temperature of 1500 deg F.

  • Corporate Authors:

    American Society of Mechanical Engineers

    Three Park Avenue
    New York, NY  USA  10016-5990
  • Authors:
    • Lee, S Y
    • Young, W E
    • Hussey, C E
  • Publication Date: 1972-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00034755
  • Record Type: Publication
  • Source Agency: United States Merchant Marine Academy
  • Files: TRIS
  • Created Date: Sep 29 1973 12:00AM