Effect of thermal aging conditions on the corrosion properties and hardness of a duplex stainless steel

Please use this identifier to cite or link to this item: https://repositorio.ufba.br/handle/ri/4904

metadata.dc.type:	Artigo de Periódico Artigo de Periódico
Title:	Effect of thermal aging conditions on the corrosion properties and hardness of a duplex stainless steel
Other Titles:	Materials Research
Authors:	May, José Eduardo Souza, Carlos Alberto Caldas de Nascente, Pedro Augusto de Paula Soares, Paulo Lepienski, Carlos Mauricio Kuri, Sebastião Elias
metadata.dc.creator:	May, José Eduardo Souza, Carlos Alberto Caldas de Nascente, Pedro Augusto de Paula Soares, Paulo Lepienski, Carlos Mauricio Kuri, Sebastião Elias
Abstract:	The corrosion properties of a 22.5 wt. (%) Cr duplex stainless steel were investigated after long-term aging of 3000, 5000 and 7000 hours at 300 and 400 ºC. The corrosion resistance was measured based on mass loss in a FeCl3 10 wt. (%) solution and electrochemical measurements in a 0.1 M H2SO4 solution. The results indicate that the corrosion resistance decreased steadily up to 5000 hours of aging. However, the samples subjected to 7000 hours of aging showed better corrosion resistance than those aged for 3000 and 5000 hours. This effect is attributed to the phase transformation that occurs during aging, a finding which was confirmed by hardness, transmission electron microscopy and X-ray photoelectron spectroscopy measurements.
Keywords:	Duplex stainless steel Corrosion Structural characterization Long-term aging
URI:	http://www.repositorio.ufba.br/ri/handle/ri/4904
Issue Date:	2010
Appears in Collections:	Artigo Publicado em Periódico (PEI)

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