0
RESEARCH PAPERS

Environmental Effects on the High-Temperature Corrosion of Superalloys in Present and Future Gas Turbines

[+] Author and Article Information
S. Y. Lee, W. E. Young

R & D Center, Westinghouse Research Laboratories, Pittsburgh, Pa.

C. E. Hussey

Westinghouse Gas Turbine Division, Westinghouse Electric Corporation, Lester, Pa.

J. Eng. Power 94(2), 149-153 (Apr 01, 1972) (5 pages) doi:10.1115/1.3445652 History: Received August 03, 1971; Online July 14, 2010

Abstract

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 Na/2 ppm V fuel would result in an excessive amount of attack with a metal surface temperature of 1500 deg F.

Copyright © 1972 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In