Porous alloys find use in modern Solid Oxide Fuel Cells as the supporting structures. As they are exposed to high temperatures (> 500°C) an oxide scale forms on their surface due to high temperature corrosion phenomena. Since the ratio between the surface area and volume is much higher than for planar samples, formation of the oxide can lead to a breakaway oxidation after relatively short times. Therefore corrosion properties of possible candidate alloys should be studied. In this work corrosion kinetics of IN625 alloy is studied in the temperature range of 700°C – 800°C in air and hydrogen atmosphere for up to 100 hours. Moreover, a method of reducing corrosion rates of porous alloys by the infiltration of simple rare earths elements is shown. Modification by the Y precursor reduces corrosion rate by a factor of 50 in air at 700°C so that the lifetime of the infiltrated alloy is greatly extended.
Authors
Additional information
- Category
- Aktywność konferencyjna
- Type
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Language
- angielski
- Publication year
- 2013
