Influence of long-term low-temperature aging on the microhardness and corrosion properties of duplex stainless steel

被引：52
|
作者：
Della Rovere, C. A. [1 ]
Santos, F. S. [1 ]
Silva, R. [1 ]
Souza, C. A. C. [2 ]
Kuri, S. E. [1 ]
机构：
[1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP, Brazil
[2] Univ Fed Bahia, Dept Mat Sci & Technol, BR-40210630 Salvador, BA, Brazil
来源：
CORROSION SCIENCE | 2013年 / 68卷
关键词：
Stainless steel; Segregation; AFM; Polarization; SEM; SPINODAL DECOMPOSITION; MATERIAL DEGRADATION; LOCALIZED CORROSION; PASSIVE FILMS; MICROSTRUCTURE; RESISTANCE; 850-DEGREES-C; EMBRITTLEMENT; DISSOLUTION; CHEMISTRY;
D O I：
10.1016/j.corsci.2012.10.038
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An investigation was made of the influence of long-term aging (up to 7000 h) at low temperatures (300 and 400 degrees C) on the corrosion and mechanical properties of a 2205 duplex stainless steel. The selective corrosion behavior of austenite and ferrite phases was found to reverse in response to aging treatment at 400 degrees C. The degree of Cr depletion (I-r/I-a) increased considerably with the increase in aging time at 400 degrees C and no self-healing process was observed even after aging for 7000 h. A good correlation was observed between the electrochemical results and the microhardness of ferrite phase. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：84 / 90
页数：7
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