Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/1115
Title: Oxidation of AISI 304 and AISI 439 stainless steels.
Authors: Huntz, Anne Marie
Reckmann, A.
Haut, Christian
Sévérac, C.
Herbst, M.
Resende, Fernando César Teixeira
Sabioni, Antônio Claret Soares
Keywords: Oxygen
Water vapour
Oxidation
AISI 304 stainless steel
AISI 439 stainless steel
Issue Date: 2007
Citation: HUNTZ, A. M. et al. Oxidation of AISI 304 and AISI 439 stainless steels. Materials Science and Engineering A, v. 447, n. 1-2, p. 266-276, fev. 2007. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0921509306021290>. Acesso em: 13 jul. 2012.
Abstract: The oxidation behaviour of AISI 304 and AISI 439 stainless steels was studied at high temperatures, under various oxygen pressures and in the presence or not of water vapour. Thermogravimetric analyses were conducted in isothermal conditions from 850 to 950 ◦C for 50 h and microstructural and chemical analyses of the oxide films grown by oxidation were performed by SEM and EDX. The oxide films were also analysed by grazing X-ray diffraction and by X photoelectron spectroscopy (XPS). The AISI 439 steel has higher oxidation resistance than AISI 304, above 850 ◦C, under high oxygen pressures. On the other hand, the AISI 304 steel has higher oxidation resistance under low oxygen pressures in the whole temperature range. In order to check whether the growth kinetics of Cr2O3 formed by the oxidation of stainless steels was controlled by oxygen or/and chromium diffusion through the oxide film, the oxidation constants were theoretically calculated on the basis of diffusion data using Wagner’s Theory. The calculated values of the oxidation constants agree reasonably well with experimental values, therefore confirming the role of diffusion processes on the growth of chromia on stainless steels.
URI: http://www.repositorio.ufop.br/handle/123456789/1115
ISSN: 09215093
metadata.dc.rights.license: O periódico Materials Science and Engineering A concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3345930503206.
Appears in Collections:DEFIS - Artigos publicados em periódicos

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