|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Temperature Corrosion of Structural Materials
||Electroless Ni-plating in Combination with Diffusion Coatings for Corrosion Protection of Steels for SO2 and Cl-rich High Temperature Environments
||Tobias Meissner, Xabier Montero, Diana Faehsing, Mathias C Galetz
|On-Site Speaker (Planned)
||Mathias C Galetz
Co-firing of biomass with coal will still play a substantial role in future energy production. Depending on the coal quality as well as the co-firing higher amounts of corrosive species such as chlorine and sulphur can be present within the boilers. Consequently, higher corrosion rates and material losses are observed e.g. on the superheater tubes. They are subjected to increased corrosive attack and are prone to early replacement. This study suggests several innovative diffusion coatings applied on selected steels commonly used as superheater tube material.
Most interesting from an economical point of view martensitic steel of type X20 was first coated with a thin nickel layer. This electroless plated interlayer is cost efficient and supposed to serve as nickel reservoir for the subsequent diffusion process of protective elements like Al, Cr and Si. For comparison uncoated material was tested and an austenitic steel and pure X20 without interlayer were coated.
||Planned: Supplemental Proceedings volume