Corrosion failures of austenitic and duplex stainless steels in a biodiesel plant

Detalhes bibliográficos
Autor(a) principal: Torres,Carlos Eduardo
Data de Publicação: 2020
Outros Autores: Santos,Thalys Eduardo dos, Lins,Vanessa de Freitas Cunha
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Matéria (Rio de Janeiro. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762020000200313
Resumo: ABSTRACT The neutralization of catalysts with hydrochloric acid is an important step in a biodiesel process which generates steel corrosion due to the decrease in pH, and the addition of chlorides in the medium. Other factor responsible for corrosion and consequently failures is the poor miscibility between biodiesel and acid water generating a heterogeneous coverage of the surface of the pipelines and equipment by biodiesel and acid water, presence of galvanic cells and localized corrosion. In this paper, corrosion failures of AISI 316L and 904L austenitic stainless steels (SS), and of SAF 2205, 2507 duplex SS in a biodiesel plant were identified and studied. The low pH, presence of chlorides, high thermal input in welding, temperature gradient and mainly proximity to the acid injection site play the major roles in corrosion which generate the studied failures. Corrosion failures occurred in pipes transporting biodiesel and acid water, in a spool of acid water injection, in a static biodiesel mixer with acidic water, in a cylindrical decanter vessel, and in heat exchangers.
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spelling Corrosion failures of austenitic and duplex stainless steels in a biodiesel plantChlorideCorrosionPipeline failuresProcess-plant failuresWeldsABSTRACT The neutralization of catalysts with hydrochloric acid is an important step in a biodiesel process which generates steel corrosion due to the decrease in pH, and the addition of chlorides in the medium. Other factor responsible for corrosion and consequently failures is the poor miscibility between biodiesel and acid water generating a heterogeneous coverage of the surface of the pipelines and equipment by biodiesel and acid water, presence of galvanic cells and localized corrosion. In this paper, corrosion failures of AISI 316L and 904L austenitic stainless steels (SS), and of SAF 2205, 2507 duplex SS in a biodiesel plant were identified and studied. The low pH, presence of chlorides, high thermal input in welding, temperature gradient and mainly proximity to the acid injection site play the major roles in corrosion which generate the studied failures. Corrosion failures occurred in pipes transporting biodiesel and acid water, in a spool of acid water injection, in a static biodiesel mixer with acidic water, in a cylindrical decanter vessel, and in heat exchangers.Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiroem cooperação com a Associação Brasileira do Hidrogênio, ABH22020-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762020000200313Matéria (Rio de Janeiro) v.25 n.2 2020reponame:Matéria (Rio de Janeiro. Online)instname:Matéria (Rio de Janeiro. Online)instacron:RLAM10.1590/s1517-707620200002.1020info:eu-repo/semantics/openAccessTorres,Carlos EduardoSantos,Thalys Eduardo dosLins,Vanessa de Freitas Cunhaeng2020-07-22T00:00:00Zoai:scielo:S1517-70762020000200313Revistahttp://www.materia.coppe.ufrj.br/https://old.scielo.br/oai/scielo-oai.php||materia@labh2.coppe.ufrj.br1517-70761517-7076opendoar:2020-07-22T00:00Matéria (Rio de Janeiro. Online) - Matéria (Rio de Janeiro. Online)false
dc.title.none.fl_str_mv Corrosion failures of austenitic and duplex stainless steels in a biodiesel plant
title Corrosion failures of austenitic and duplex stainless steels in a biodiesel plant
spellingShingle Corrosion failures of austenitic and duplex stainless steels in a biodiesel plant
Torres,Carlos Eduardo
Chloride
Corrosion
Pipeline failures
Process-plant failures
Welds
title_short Corrosion failures of austenitic and duplex stainless steels in a biodiesel plant
title_full Corrosion failures of austenitic and duplex stainless steels in a biodiesel plant
title_fullStr Corrosion failures of austenitic and duplex stainless steels in a biodiesel plant
title_full_unstemmed Corrosion failures of austenitic and duplex stainless steels in a biodiesel plant
title_sort Corrosion failures of austenitic and duplex stainless steels in a biodiesel plant
author Torres,Carlos Eduardo
author_facet Torres,Carlos Eduardo
Santos,Thalys Eduardo dos
Lins,Vanessa de Freitas Cunha
author_role author
author2 Santos,Thalys Eduardo dos
Lins,Vanessa de Freitas Cunha
author2_role author
author
dc.contributor.author.fl_str_mv Torres,Carlos Eduardo
Santos,Thalys Eduardo dos
Lins,Vanessa de Freitas Cunha
dc.subject.por.fl_str_mv Chloride
Corrosion
Pipeline failures
Process-plant failures
Welds
topic Chloride
Corrosion
Pipeline failures
Process-plant failures
Welds
description ABSTRACT The neutralization of catalysts with hydrochloric acid is an important step in a biodiesel process which generates steel corrosion due to the decrease in pH, and the addition of chlorides in the medium. Other factor responsible for corrosion and consequently failures is the poor miscibility between biodiesel and acid water generating a heterogeneous coverage of the surface of the pipelines and equipment by biodiesel and acid water, presence of galvanic cells and localized corrosion. In this paper, corrosion failures of AISI 316L and 904L austenitic stainless steels (SS), and of SAF 2205, 2507 duplex SS in a biodiesel plant were identified and studied. The low pH, presence of chlorides, high thermal input in welding, temperature gradient and mainly proximity to the acid injection site play the major roles in corrosion which generate the studied failures. Corrosion failures occurred in pipes transporting biodiesel and acid water, in a spool of acid water injection, in a static biodiesel mixer with acidic water, in a cylindrical decanter vessel, and in heat exchangers.
publishDate 2020
dc.date.none.fl_str_mv 2020-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762020000200313
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762020000200313
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/s1517-707620200002.1020
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro
em cooperação com a Associação Brasileira do Hidrogênio, ABH2
publisher.none.fl_str_mv Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro
em cooperação com a Associação Brasileira do Hidrogênio, ABH2
dc.source.none.fl_str_mv Matéria (Rio de Janeiro) v.25 n.2 2020
reponame:Matéria (Rio de Janeiro. Online)
instname:Matéria (Rio de Janeiro. Online)
instacron:RLAM
instname_str Matéria (Rio de Janeiro. Online)
instacron_str RLAM
institution RLAM
reponame_str Matéria (Rio de Janeiro. Online)
collection Matéria (Rio de Janeiro. Online)
repository.name.fl_str_mv Matéria (Rio de Janeiro. Online) - Matéria (Rio de Janeiro. Online)
repository.mail.fl_str_mv ||materia@labh2.coppe.ufrj.br
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