The study aims to the development of methods and models for the
assessment of material performance in boilers and use of mixed fuels with
combustion gas species like H2O, HCl or SO2. Gas phase oxidation tests at
elevated temperatures under different atmospheres were carried out for
selected steels. Formed oxide scales were characterised using EDS/SEM, and
mass changes were measured for the exposed samples. Thermodynamic stability
calculations simulating oxidation correspond quite well to the oxide
structures formed in laboratory exposures for specified steel compositions.
The results from laboratory exposures were also used to model the oxidation
kinetics. The results show that oxidation kinetics and mechanism are strongly
dependent on temperature and gas species like H2O, HCl and SO2. A further
goal is to combine thermodynamic calculations and kinetic measurements for
oxidation simulation to get an efficient tool for prediction of corrosion for
specific steel types and combustion conditions.
|Conference||BALTICA VII - International Conference on Life Management and Main-tenance for Power Plants|
|Period||12/06/07 → 14/06/07|