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Degradation of metals and coatings at high temperatures

Degradation of metals and coatings at high temperatures

Background

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
     

Techniques

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
     

Student

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