Study of the sensitisation process of a duplex stainless steel (UNS 1.4462) by means of confocal microscopy and localised electrochemical techniques

被引：27
|
作者：
Leiva-Garcia, R. [1 ,3 ]
Fernandes, J. C. S. [2 ]
Munoz-Portero, M. J. [1 ]
Garcia-Anton, J. [1 ]
机构：
[1] Univ Politecn Valencia, IEC, Dept Ingn Quim & Nucl, ETSI Ind, E-46071 Valencia, Spain
[2] Univ Tecn Lisboa, ICEMS, DEQ, Inst Super Tecn, P-1049001 Lisbon, Portugal
[3] Univ Manchester, Sch Mat, Manchester M13 9PL, Lancs, England
来源：
CORROSION SCIENCE | 2015年 / 94卷
关键词：
Stainless steel; Segregation; Pitting corrosion; Polarisation; EIS; SIGMA-PHASE PRECIPITATION; PASSIVE FILMS; INTERGRANULAR CORROSION; ELECTRONIC-STRUCTURE; SEMICONDUCTING PROPERTIES; PITTING CORROSION; OXYGEN REDUCTION; OXIDE-FILMS; IMPEDANCE SPECTROSCOPY; CARBON-STEEL;
D O I：
10.1016/j.corsci.2015.02.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
When duplex stainless steels are heated, they can become sensitised and intermetallic phases can appear. In this work, samples of duplex stainless steel, UNS 1.4462, have been heated (850 degrees C for 1 and 2 h) in a heating unit that can be accommodated to a confocal microscope in order to study the morphological changes in-situ. The electrochemical behaviour of the samples has been analysed by means of conventional and localised electrochemical techniques. According to the results, there is a general decrease in the steel resistance to localised corrosion; this decrease can be related to defects in the formed passive film. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：327 / 341
页数：15
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