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Degradation of metals and coatings at high temperatures


In the energy sector high temperature corrosion of metals due to oxidation, sulfidation, carburization and metal dusting is a major concern.

The project investigates the degradation of high alloyed materials and coatings at temperatures above 1000°C under oxidation conditions.

Key parameters

Key parameters of the project include:

  • Characterization of the oxide films formed
  • Grain growth of the base metal
  • Changes in phase composition
  • Formation of brittle precipitates
  • Interdiffusion between base metals and coatings
  • Disbanding of coatings

The following techniques were used:

  • Heat treatments under controlled conditions
  • Preparation of metallographic specimens
  • Light optical microscopy
  • Scanning electron microscopy
  • Electron dispersive X-ray analyses
  • X-ray diffractometry
  • Microhardness measurement

Stine Søndergaard, DTU, Department of Chemical Engineering
Trainee in the Technology Division, Engineering Development Department.