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

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

Media Info

• Features: References;
• Pagination: p. 149-153
• Serial:
  • ASME Journal of Engineering for Power
  • Volume: 94-A
  • Issue Number: 2
  • Publisher: American Society of Mechanical Engineers

Subject/Index Terms

• TRT Terms: Alloys; Blades (Machinery); Corrosion; Engine materials; Gas turbines; High temperature
• Old TRIS Terms: Alloy corrosion behavior; High temperature corrosion
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

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