HOT CORROSION MECHANISM STUDIES

Abstract

The occurrence and nature of 'hot corrosion' was investigated. The elements nickel and cobalt, their binary alloys with chromium, and simple ternary alloys composed of third elements added to chromium-nickel and chromium- cobalt, were studied. Reaction kinetics of sulfate-induced oxidation were studied by thermal balance techniques. Hot corrosion severity at 1675, 1750, and 1900F was determined for the prepared samples in burner rig tests that simulate actual engine environments. The nature of the corrosive attack was studied morphologically, largely by metallographic examinations. Hot corrosion enhanced oxidation has been shown to follow sulfidation attack after sulfate reduction by the basis metal. The effects of sulfate concentrations, oxygen pressures, surface oxide film thicknesses, and temperatures were determined for elemental nickel, cobalt, and some of their alloys with chromium.

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Document Details

Document Type
Technical Report
Publication Date
Feb 15, 1966
Accession Number
AD0629598

Entities

Organizations

  • General Electric

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Body Weight
  • Chemical Reactions
  • Chemistry
  • Chromium
  • Combustion
  • Gas Turbines
  • Gases
  • High Temperature
  • Material Degradation Processes
  • Materials
  • Materials Processing
  • Measurement
  • Oxidation
  • Oxide Films
  • Oxides
  • Sodium Compounds
  • Solid Solutions

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Surface Engineering/Surface Coating Technology.
  • Theoretical Analysis.