Corrosion Behavior of Plasma Nitrided and Nitrocarburised Supermartensitic Stainless Steel
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/1980-5373-MR-2016-0793 http://hdl.handle.net/11449/166135 |
Resumo: | Supermartensitic stainles steels (SMSS's) are a new generation of martensitic steels that have been increasingly used in oil and gas applications due to their adequate corrosion resistance and mechanical properties. In the present study, SMSS specimens (UNS S41425) were solution heat treated and air cooled followed by plasma nitriding and nitrocarburising at 400, 450 and 500 degrees C for 5h. The produced layers were characterized by optical microscopy, microhardness testing, X-ray diffraction and corrosion testing in NaCl 3.5% solution. Surface alloying with nitrogen or both nitrogen and carbon results in increased surface hardness and homogeneous layers in which layer thickness increases with temperature. However, plasma nitriding yields a slightly thicker case than nitrocarburising. X-ray diffraction indicates very broad and overlapped peaks for the treatments conducted at 400 degrees C. Increasing treatment temperature appears to result in the formation of chromium nitrides and iron nitrides and carbides, depending on the treatment. It was also found that treatment temperature drastically affects the corrosion response of the steel. The untreated steel presented a pitting potential close to 250mV. Plasma nitriding at 400 degrees C was the only condition in which significant improvement of corrosion is observed. For plasma nitriding and nitrocarburising at 450 and 500 degrees C, some pitting was detected. |
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Corrosion Behavior of Plasma Nitrided and Nitrocarburised Supermartensitic Stainless SteelSupermartensitic stainless steelsPlasma nitridingPlasma nitrocarburisingCorrosionSupermartensitic stainles steels (SMSS's) are a new generation of martensitic steels that have been increasingly used in oil and gas applications due to their adequate corrosion resistance and mechanical properties. In the present study, SMSS specimens (UNS S41425) were solution heat treated and air cooled followed by plasma nitriding and nitrocarburising at 400, 450 and 500 degrees C for 5h. The produced layers were characterized by optical microscopy, microhardness testing, X-ray diffraction and corrosion testing in NaCl 3.5% solution. Surface alloying with nitrogen or both nitrogen and carbon results in increased surface hardness and homogeneous layers in which layer thickness increases with temperature. However, plasma nitriding yields a slightly thicker case than nitrocarburising. X-ray diffraction indicates very broad and overlapped peaks for the treatments conducted at 400 degrees C. Increasing treatment temperature appears to result in the formation of chromium nitrides and iron nitrides and carbides, depending on the treatment. It was also found that treatment temperature drastically affects the corrosion response of the steel. The untreated steel presented a pitting potential close to 250mV. Plasma nitriding at 400 degrees C was the only condition in which significant improvement of corrosion is observed. For plasma nitriding and nitrocarburising at 450 and 500 degrees C, some pitting was detected.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Fed ABC, Ctr Engn Modelagem & Ciencias Sociais Aplicadas, Alameda Univ S-N, BR-09606070 Sao Bernardo Do Campo, SP, BrazilUniv Estadual Paulista, Fac Engn Ilha Solteira, Av Brasil Ctr 56, BR-15385000 Ilha Solteira, SP, BrazilPortland State Univ, Dept Mech & Mat Engn, Portland, OR 97207 USAUniv Sao Paulo, Escola Engn Sao Carlos, Dept Engn Mat, Av Joao Dagnone 1100, BR-13563120 Sao Carlos, SP, BrazilUniv Estadual Paulista, Fac Engn Ilha Solteira, Av Brasil Ctr 56, BR-15385000 Ilha Solteira, SP, BrazilUniv Fed Sao Carlos, Dept Engenharia MaterialsUniversidade Federal do ABC (UFABC)Universidade Estadual Paulista (Unesp)Portland State UnivUniversidade de São Paulo (USP)Pires Fernandes, Frederico AugustoPicone, Carlos Alberto [UNESP]Totten, George EdwardCasteletti, Luiz Carlos2018-11-29T14:59:47Z2018-11-29T14:59:47Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article9application/pdfhttp://dx.doi.org/10.1590/1980-5373-MR-2016-0793Materials Research-ibero-american Journal Of Materials. Sao Carlos: Univ Fed Sao Carlos, Dept Engenharia Materials, v. 21, n. 3, 9 p., 2018.1516-1439http://hdl.handle.net/11449/16613510.1590/1980-5373-MR-2016-0793S1516-14392018000300011WOS:000432387700002S1516-14392018000300011.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Research-ibero-american Journal Of Materials0,398info:eu-repo/semantics/openAccess2023-11-21T06:16:36Zoai:repositorio.unesp.br:11449/166135Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-21T06:16:36Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Corrosion Behavior of Plasma Nitrided and Nitrocarburised Supermartensitic Stainless Steel |
title |
Corrosion Behavior of Plasma Nitrided and Nitrocarburised Supermartensitic Stainless Steel |
spellingShingle |
Corrosion Behavior of Plasma Nitrided and Nitrocarburised Supermartensitic Stainless Steel Pires Fernandes, Frederico Augusto Supermartensitic stainless steels Plasma nitriding Plasma nitrocarburising Corrosion |
title_short |
Corrosion Behavior of Plasma Nitrided and Nitrocarburised Supermartensitic Stainless Steel |
title_full |
Corrosion Behavior of Plasma Nitrided and Nitrocarburised Supermartensitic Stainless Steel |
title_fullStr |
Corrosion Behavior of Plasma Nitrided and Nitrocarburised Supermartensitic Stainless Steel |
title_full_unstemmed |
Corrosion Behavior of Plasma Nitrided and Nitrocarburised Supermartensitic Stainless Steel |
title_sort |
Corrosion Behavior of Plasma Nitrided and Nitrocarburised Supermartensitic Stainless Steel |
author |
Pires Fernandes, Frederico Augusto |
author_facet |
Pires Fernandes, Frederico Augusto Picone, Carlos Alberto [UNESP] Totten, George Edward Casteletti, Luiz Carlos |
author_role |
author |
author2 |
Picone, Carlos Alberto [UNESP] Totten, George Edward Casteletti, Luiz Carlos |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal do ABC (UFABC) Universidade Estadual Paulista (Unesp) Portland State Univ Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Pires Fernandes, Frederico Augusto Picone, Carlos Alberto [UNESP] Totten, George Edward Casteletti, Luiz Carlos |
dc.subject.por.fl_str_mv |
Supermartensitic stainless steels Plasma nitriding Plasma nitrocarburising Corrosion |
topic |
Supermartensitic stainless steels Plasma nitriding Plasma nitrocarburising Corrosion |
description |
Supermartensitic stainles steels (SMSS's) are a new generation of martensitic steels that have been increasingly used in oil and gas applications due to their adequate corrosion resistance and mechanical properties. In the present study, SMSS specimens (UNS S41425) were solution heat treated and air cooled followed by plasma nitriding and nitrocarburising at 400, 450 and 500 degrees C for 5h. The produced layers were characterized by optical microscopy, microhardness testing, X-ray diffraction and corrosion testing in NaCl 3.5% solution. Surface alloying with nitrogen or both nitrogen and carbon results in increased surface hardness and homogeneous layers in which layer thickness increases with temperature. However, plasma nitriding yields a slightly thicker case than nitrocarburising. X-ray diffraction indicates very broad and overlapped peaks for the treatments conducted at 400 degrees C. Increasing treatment temperature appears to result in the formation of chromium nitrides and iron nitrides and carbides, depending on the treatment. It was also found that treatment temperature drastically affects the corrosion response of the steel. The untreated steel presented a pitting potential close to 250mV. Plasma nitriding at 400 degrees C was the only condition in which significant improvement of corrosion is observed. For plasma nitriding and nitrocarburising at 450 and 500 degrees C, some pitting was detected. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-29T14:59:47Z 2018-11-29T14:59:47Z 2018-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/1980-5373-MR-2016-0793 Materials Research-ibero-american Journal Of Materials. Sao Carlos: Univ Fed Sao Carlos, Dept Engenharia Materials, v. 21, n. 3, 9 p., 2018. 1516-1439 http://hdl.handle.net/11449/166135 10.1590/1980-5373-MR-2016-0793 S1516-14392018000300011 WOS:000432387700002 S1516-14392018000300011.pdf |
url |
http://dx.doi.org/10.1590/1980-5373-MR-2016-0793 http://hdl.handle.net/11449/166135 |
identifier_str_mv |
Materials Research-ibero-american Journal Of Materials. Sao Carlos: Univ Fed Sao Carlos, Dept Engenharia Materials, v. 21, n. 3, 9 p., 2018. 1516-1439 10.1590/1980-5373-MR-2016-0793 S1516-14392018000300011 WOS:000432387700002 S1516-14392018000300011.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Research-ibero-american Journal Of Materials 0,398 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
9 application/pdf |
dc.publisher.none.fl_str_mv |
Univ Fed Sao Carlos, Dept Engenharia Materials |
publisher.none.fl_str_mv |
Univ Fed Sao Carlos, Dept Engenharia Materials |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1799965023397740544 |