Study of early P91 dual corrosion in steam and simulated combustion gases from a gas-fired boiler

P91 ferritic steel pipes face dual environments during boilers operation: steam-side and fire-side. This P91 steel assessment differs from the dual studies performed to simulate coal-fired boilers -oxyfuel/steam atmospheres- since the fuel source is replaced by natural gas. This research work includes designing a device to reproduce dual corrosion studies at 650 °C and testing times up to 200 h. One coupon face was exposed to combustion gases while the other to steam. As a main result, the duplex's inner layer allowed to state that combustion gases overcome the steam oxidation rate by a factor of 1.6. Besides, we supplied physical-chemistry information about the surface and bulk of oxide layers by atomic force microscopy, scanning electron microscopy, x-ray photoelectron spectroscopy, and x-ray diffraction analysis. Thus, our experiments aimed to obtain data about the P91 early degradation under the simultaneous 72.73N2/8.30CO2/3.37O2/15.60H2O %mol and steam influence. We last for a future work the isolated evaluation of both environments to determine their role on the corrosion rate obtained in the current study.

• Autores: Alviz-Meza, Anibal; Duong, Adam; Orozco-Agamez, Juan; Kafarov, Viatcheslav; Cárdenas-Escorcia, Yulineth; Carrillo-Caballero, Gaylord; Peña-Ballesteros, Darío
• Tipo de recurso: Article of journal
• Fecha de publicación: 2021
• Institución: Corporación Universidad de la Costa
• Repositorio: REDICUC - Repositorio CUC
• Idioma: eng
• OAI Identifier: oai:repositorio.cuc.edu.co:11323/8514
• Acceso en línea: https://hdl.handle.net/11323/8514; https://doi.org/10.1016/j.jmrt.2021.04.071; https://repositorio.cuc.edu.co/
• Palabra clave: Gas-fired boiler; Dual environment; Steam; Combustion gases; Corrosion rate
• Rights: openAccess
• License: Attribution-NonCommercial-NoDerivatives 4.0 International