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Quantitative Analysis of the Sensitization of an Austenitic Stainless Steel Aged between 600 and 900°C through Electrochemical and Microstructural Measurements

2020; Trans Tech Publications; Volume: 1012; Linguagem: Inglês

10.4028/www.scientific.net/msf.1012.430

1662-9760

Ramaiany Carneiro Mesquita, Ariele Rebeca Martins Ribeiro, Cintia Leite Gonçalves, Diogo Marcelo Lima Ribeiro, Sarah Caroline Gomes Caldas,

High Temperature Alloys and Creep

Is the concern with latent phenomenon of sensitization, as it exposes austenitic stainless steels to one of the most severe types of corrosion, intergranular, caused by chrome impoverishment in some regions after the material has been treated thermally in a temperature range between 450°C and 850°C. The aim of this study is to identify the conditions under which the stainless steel AISI 304 austenitic will sensitize, microstructural analysis and reactivation potentiodynamics technique by Double cycle method (DL-EPR). In steel samples were subjected to different ranges of time and temperature. The behavior of the degree of sentiment reveals that the rainfall happens so intense under the conditions under study with the exception of 900oC - 1, 2, and 6, which was observed and proven both by microstructural analysis and the DL-EPR.