Comparison between pilot and lab scale testing of aluminide coated and uncoated ferritic steels under oxy-fuel and coal/thistle co-firing conditions

• DOI: 10.1016/j.surfcoat.2022.128982
• Publication Date: 2022-10-20T16:07:37Z
• Authors: M. Gutiérrez; A. Illana; A. Bahillo; M.J. Benito; G. García-Martín; F.J. Pérez; A. Agüero
• Keywords: Aluminide

The present study compares the biomass corrosion behavior of two diffusion aluminide coating obtained by slurry application, which were deposited on low-chromium content steels, ferritic-martensitic P92 (8.7 wt% Cr) and ferritic T22 (2 Cr). Their performance degradation was conducted under an oxy-fuel combustion environment for both coated uncoated materials laboratory conditions in a pilot plant burning thistle 500 h. Exposures carried out at different temperatures, 600 °C 650 °C, model atmosphere consisting 60 % CO2, 30 H2O, 8 O2, bal.% N2 (in vol%), vppm HCl 2 SO2. used mixed fuel coal 40 that burnt samples exposed to temperature range 600–620 °C. After testing, results revealed aluminide-coated exhibited very high resistance extreme scenarios, with variable protective character related their Al content. On contrary, material severe degradation, particular T22. Microstructural morphological studies showed up similar patterns products testing environments.