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.