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

页码：327 / 341

页数：15

共 49 条

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