7th IMRMPT

Abstract

Abstract information

English title:	Characterization of thermal films formed between 100�C to 400�C on ASTM A-213 T91 (Fe-9Cr-1Mo) steel in atmospheres: H2S-N2-O2 and air.
Spanish title:	Caracterizaci�n de pel�culas t�rmicas formadas entre 100�C a 400�C sobre un acero ASTM A-213 T91 (Fe-9Cr-1Mo) en atm�sferas: H2S-N2-O2 y aire.
English abstract:	ASTM A-213 T91 (Fe-9Cr-1Mo) steel is known in its applications for being resistant to high temperatures and resistant to gases, highly oxidizing, carburizing and sulfiding agents. Its use in the construction of catalytic conversion units in heavy crude oil still generates uncertainty, given the high demands on the formation of highly stable protective layers in the operating temperature ranges. Ferritic steels have been selected for use in the construction of crude refining units with thermocatalytic processes due to their adequate microstructure, their low carbon content and their balance between chromium and molybdenum content. The importance of these factors, both microstructural and compositional, which added to the enrichment of chemical elements from the gases produced from CO2 and H2S and from the heavy crude oil itself, is greatly reflected in the quality of the protective layers formed that serve as a barrier. both thermal and physicochemical in an environment of highly aggressive atmospheres. This paper analyzes the characterization results of layers formed on an ASTM A-213 T91 (Fe-9Cr-1Mo) steel in atmospheres: H2S-N2-O2 and air between 100�C and 400�C. Atomic force microscopy techniques in mechanical and electrical modes, Confocal Raman Spectroscopy, Raman thermometry, Scanning Electron Microscopy and Energy Dispersive X-rays, were used to compare and discuss the obtained results. The characterization focused on analyzing the layers formed on this steel based on its structural stability.
Spanish abstract:	El acero ASTM A-213 T91 (Fe-9Cr-1Mo) se conoce en sus aplicaciones por ser resistente a temperaturas elevadas y resistentes a gases, altamente oxidantes, carburizantes y sulfidantes. Su uso en la construcci�n de unidades de conversi�n catal�tica en crudos pesados, a�n genera incertidumbre, dada las altas exigencias en la formaci�n de capas protectoras altamente estables en los rangos de temperatura de operaci�n. Los aceros ferr�ticos han sido seleccionados para uso en la construcci�n de unidades de refinaci�n de crudo con procesos termocatal�ticos por su adecuada microestructura, su bajo contenido de carbono y su balance entre el contenido de cromo y de molibdeno. La importancia de estos factores, tanto microestructurales como de composici�n, que sumado al enriquecimiento de elementos qu�micos provenientes de los gases producidos de CO2 y H2S y del mismo crudo pesado, se refleja enormemente en la calidad de las capas de protecci�n formada que sirven de barrera tanto t�rmica como fisicoqu�mica ante un ambiente de atm�sferas altamente agresivas. En este trabajo se analizan los resultados de caracterizaci�n de capas formadas sobre un acero ASTM A-213 T91 (Fe-9Cr-1Mo) en atm�sferas: H2S-N2-O2 y aire entre 100�C a 400�C. T�cnicas de microscop�a de fuerza at�mica en los modos mec�nicos y el�ctricos, Espectroscop�a Confocal Raman, termometr�a Raman, Microscop�a Electr�nica de Barrido y Energ�a Dispersiva de Rayos X, fueron empleadas para comparar y discutir los resultados obtenidos. La caracterizaci�n se enfoc� en analizar las capas formadas sobre este acero en funci�n de su estabilidad estructural.
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Authors

Name	Institution	Email
Maria Isabel Bedoya Moreno	Universidad Nacional de Colombia	mibedoya@unal.edu.co
Hugo Armando Estupi�an Duran	Universidad Nacional de Colombia	haestupinand@unal.edu.co

Presentation

Room:	Principal Room
Date:	June 8, 2023
Hour:	14:40 - 15:00

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7^th IMRMPT
Seventh International Meeting for Researchers in Materials and Plasma Technology

Previous editions:

        1st IMRMPT 2011
        2nd IMRMPT 2013
        3rd IMRMPT 2015
        4th IMRMPT 2017
        5th IMRMPT 2019
        5+1 IMRMPT 2021

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