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

R. Leiva-García; J. C.S. Fernandes; M. J. Muñoz-Portero; J. García-Antón

doi:10.1016/j.corsci.2015.02.016

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

R. Leiva-García, J. C.S. Fernandes, M. J. Muñoz-Portero, J. García-Antón^*

^*Corresponding author for this work

Materials Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

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. °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.

Original language	English
Pages (from-to)	327-341
Number of pages	15
Journal	Corrosion Science
Volume	94
DOIs	https://doi.org/10.1016/j.corsci.2015.02.016
Publication status	Published - 1 May 2015

Keywords

A. Stainless steel
B. EIS
B. Polarisation
C. Pitting corrosion
C. Segregation

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10.1016/j.corsci.2015.02.016

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

abstract = "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. °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.",

keywords = "A. Stainless steel, B. EIS, B. Polarisation, C. Pitting corrosion, C. Segregation",

author = "R. Leiva-Garc{\'i}a and Fernandes, {J. C.S.} and Mu{\~n}oz-Portero, {M. J.} and J. Garc{\'i}a-Ant{\'o}n",

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doi = "10.1016/j.corsci.2015.02.016",

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AU - Leiva-García, R.

AU - Fernandes, J. C.S.

AU - Muñoz-Portero, M. J.

AU - García-Antón, J.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - 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. °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.

AB - 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. °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.

KW - A. Stainless steel

KW - B. EIS

KW - B. Polarisation

KW - C. Pitting corrosion

KW - C. Segregation

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DO - 10.1016/j.corsci.2015.02.016

M3 - Article

AN - SCOPUS:84925368433

SN - 0010-938X

VL - 94

SP - 327

EP - 341

JO - Corrosion Science

JF - Corrosion Science

ER -

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

Abstract

Keywords

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