Coatings for improvement of high temperature corrosion resistance of porous alloys

Porous alloys are proposed as supports for the next generation solid oxide fuel cells. Their application lowers the price of the fuel cells, which will result in faster commercialization. However, they are prone to high temperature corrosion. So far, there is lack of methods, which can improve high temperature properties of porous alloys for SOFC applications. A method for improving corrosion resistance of porous alloys has been proposed and investigated here. In this work protective coatings are prepared by the infiltration of precursor solutions that contain Y cations. High temperature oxidation properties of the modified alloys are compared with non-modified samples by cyclic thermogravimetry, electron microscopy and X-ray diffractometry measurements. The infiltration of Y precursor into the porous alloy decreases the high temperature corrosion rate. This method can be used to improve long term properties of porous alloys applied for fuel cells supports.