J. Wilden, S. Jahn, S. Reich, V. E. Drescher, Technische Universität Berlin, Berlin, Germany
Surfaces in waste incineration plants are exposed to high temperatures and an atmosphere containing HCl and KCl. The high corrosiveness of these gases defines the service time and is the main reason for high maintenance costs. Spraying a corrosion-protection coating on conventional steel gives the possibility to improve the performance of the surface significantly. Due to its easy handling and low operating costs wire arc spraying has become one of the most established processes. To realize appropriate corrosion protection, dense coatings are essential. Therefore the wire arc spray process has to be adapted to the special requirements of waste incineration plants.
Further more the feedstock is in the focus of the public funded project. For corrosion protection Ni- and Co-based alloys are state of the art. The substitution of these materials by Fe-based alloys will lead to a notable economic benefit. Latest research activities proved the addition of silicon raises the corrosion resistance compared to FeCr- and NiCr-based alloys. Therefore different Fe-Cr-Si-materials are part of the investigation. This paper deals with the first results of alloy development.
