An Investigation of the Hot Corrosion Protectivity Behavior of Platinum Modified Aluminide Coatings on Nickel-Based Superalloys

Abstract

The adverse operating environments encountered by marine gas turbine components has necessitated the development of various protective coating systems. Diffusion aluminide coatings have been used successfully for many years to enhance the hot corrosion resistance of turbine blades and vanes. Recently, it has been found that by modifying these standard aluminide coatings with a thin platinum underlay, significant improvements in high temperature corrosion resistance can be achieved. Using a laboratory furnace specifically modified to reproduce hot corrosion attack morphologies, the effects of selected platinum- aluminide coating deposition variables were investigated on two nickel-base superalloy substrates. Keywords: Turbines, Blades, Coatings, Platinum Aluminides, Chromium, Corrosion.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1987
Accession Number
ADA181795

Entities

People

  • Rudolph E. Malush

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Chemical Vapor Deposition
  • Chemistry
  • Coatings
  • Engineering
  • Engineers
  • Gas Turbines
  • Heat Resistant Alloys
  • High Temperature
  • Low Temperature
  • Materials
  • Materials Engineering
  • Mechanical Engineering
  • Mechanical Properties
  • Sheet Metal
  • Turbine Blades
  • Turbine Components
  • Turbines

Fields of Study

  • Materials science

Readers

  • Aerodynamics.
  • Materials Science and Engineering.
  • Surface Engineering/Surface Coating Technology.