Análise de causas de rejeições de peças de aço zincadas a quente
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações do Mackenzie |
Texto Completo: | http://dspace.mackenzie.br/handle/10899/24216 |
Resumo: | In this work the causes of rejection of lots of artifacts from the company Produto para Linhas Preformados, PLP, were analyzed which are made of steel SAE 1010 and SAE 1020 and zinc coated by hot-dip galvanizing. Lots of samples from different manufacturers were selected, with different chemical composition and geometry, but belonging to rejected lots and approved lots in accordance with usual market standards. The rejections are due to problems related to the adhesion of the layer of zinc. The samples were submitted to optical microscopy test, scanning electron microscopy and X-ray diffractions for comparative checking of between the structures of zinc formed layers by hot -dip galvanizing. To verify the corrosion in coating failure, corrosion tests were performed in three different environments: urban environment considered to be low-polluted; environment simulating sea water, salt spray. There is no failure evidence between the zinc coating and the substrate structure; irregular coatings and not very well defined phases were found in the rejected parts. In regions with failures, the results show a behavior similar to the literature with the rapid formation of rust at the beginning of the exposure followed by a show oxidation. |
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http://lattes.cnpq.br/9144130519262852Vatavuk, Janhttp://lattes.cnpq.br/2607688973456560Panossian, Zehbourhttp://lattes.cnpq.br/1677499041492104Faldini, Sonia Braunsteinhttp://lattes.cnpq.br/5677034977004588Pedroso, Danieli Cristina2016-04-18T21:36:00Z2020-05-28T18:07:34Z2010-02-252020-05-28T18:07:34Z2009-08-17http://dspace.mackenzie.br/handle/10899/24216In this work the causes of rejection of lots of artifacts from the company Produto para Linhas Preformados, PLP, were analyzed which are made of steel SAE 1010 and SAE 1020 and zinc coated by hot-dip galvanizing. Lots of samples from different manufacturers were selected, with different chemical composition and geometry, but belonging to rejected lots and approved lots in accordance with usual market standards. The rejections are due to problems related to the adhesion of the layer of zinc. The samples were submitted to optical microscopy test, scanning electron microscopy and X-ray diffractions for comparative checking of between the structures of zinc formed layers by hot -dip galvanizing. To verify the corrosion in coating failure, corrosion tests were performed in three different environments: urban environment considered to be low-polluted; environment simulating sea water, salt spray. There is no failure evidence between the zinc coating and the substrate structure; irregular coatings and not very well defined phases were found in the rejected parts. In regions with failures, the results show a behavior similar to the literature with the rapid formation of rust at the beginning of the exposure followed by a show oxidation.Neste trabalho foram analisadas as causas da rejeição de lotes de artefatos da empresa Produto para Linhas Preformados, PLP, fabricados com aços SAE 1010 e SAE 1020 e zincados por imersão a quente. Foram selecionadas amostras de lotes de fabricantes diferentes, com composição química e geometrias distintas, pertencentes a lotes rejeitados e a lotes aprovados de acordo com normas usuais de mercado. As rejeições se devem a problemas relacionados a aderência da camada de zinco. As amostras foram submetidas a exames por microscopia óptica, microscopia de varredura e análises por difração de raio-X para verificação comparativa entre as estruturas das camadas de zinco formadas no processo zincagem por imersão a quente. Para verificar a corrosão nas falhas de revestimento de zinco, foram realizados ensaios de corrosão em três ambientes diferentes: ambiente considerado urbano de baixa poluição; ambiente simulando água do mar; câmara de névoa salina. Não há indício de relação entre a falha nos revestimentos de zinco e a estrutura do substrato; revestimentos irregulares e com fases não muito bem definidas foram encontrados nas peças rejeitadas. Nas regiões com falha, os resultados evidenciam um comportamento semelhante ao da literatura, com formação rápida de ferrugem no início da exposição das peças seguida por uma oxidação lenta.application/pdfporUniversidade Presbiteriana MackenzieEngenharia de MateriaisUPMBREngenharia de Materiaisgalvanizaçãoaço zincadocamadas intermetálicaszincagem a quentegalvanizinggalvanized steelintermetallic layershot-dip galvanizingCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICAAnálise de causas de rejeições de peças de aço zincadas a quenteinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações do Mackenzieinstname:Universidade Presbiteriana Mackenzie (MACKENZIE)instacron:MACKENZIEORIGINALDanieli Cristina Pedroso....pdfDanieli Cristina Pedroso....pdfDanieli Pedrosoapplication/pdf7889875https://dspace.mackenzie.br/bitstream/10899/24216/1/Danieli%20Cristina%20Pedroso....pdfd2bcd2f093726b7bff0e484cd85cd337MD51TEXTDanieli Cristina Pedroso....pdf.txtDanieli Cristina Pedroso....pdf.txtExtracted texttext/plain106798https://dspace.mackenzie.br/bitstream/10899/24216/2/Danieli%20Cristina%20Pedroso....pdf.txt5088a1e00e97f48983e208cb1a696d2dMD52THUMBNAILDanieli Cristina Pedroso....pdf.jpgDanieli Cristina Pedroso....pdf.jpgGenerated Thumbnailimage/jpeg1137https://dspace.mackenzie.br/bitstream/10899/24216/3/Danieli%20Cristina%20Pedroso....pdf.jpg8f9cb869fefd7a55e07da491b601a05cMD5310899/242162022-03-09 03:00:31.25Biblioteca Digital de Teses e Dissertaçõeshttp://tede.mackenzie.br/jspui/PRI |
dc.title.por.fl_str_mv |
Análise de causas de rejeições de peças de aço zincadas a quente |
title |
Análise de causas de rejeições de peças de aço zincadas a quente |
spellingShingle |
Análise de causas de rejeições de peças de aço zincadas a quente Pedroso, Danieli Cristina galvanização aço zincado camadas intermetálicas zincagem a quente galvanizing galvanized steel intermetallic layers hot-dip galvanizing CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
title_short |
Análise de causas de rejeições de peças de aço zincadas a quente |
title_full |
Análise de causas de rejeições de peças de aço zincadas a quente |
title_fullStr |
Análise de causas de rejeições de peças de aço zincadas a quente |
title_full_unstemmed |
Análise de causas de rejeições de peças de aço zincadas a quente |
title_sort |
Análise de causas de rejeições de peças de aço zincadas a quente |
author |
Pedroso, Danieli Cristina |
author_facet |
Pedroso, Danieli Cristina |
author_role |
author |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/9144130519262852 |
dc.contributor.referee1.fl_str_mv |
Vatavuk, Jan |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/2607688973456560 |
dc.contributor.referee2.fl_str_mv |
Panossian, Zehbour |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/1677499041492104 |
dc.contributor.advisor1.fl_str_mv |
Faldini, Sonia Braunstein |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/5677034977004588 |
dc.contributor.author.fl_str_mv |
Pedroso, Danieli Cristina |
contributor_str_mv |
Vatavuk, Jan Panossian, Zehbour Faldini, Sonia Braunstein |
dc.subject.por.fl_str_mv |
galvanização aço zincado camadas intermetálicas zincagem a quente |
topic |
galvanização aço zincado camadas intermetálicas zincagem a quente galvanizing galvanized steel intermetallic layers hot-dip galvanizing CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
dc.subject.eng.fl_str_mv |
galvanizing galvanized steel intermetallic layers hot-dip galvanizing |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
description |
In this work the causes of rejection of lots of artifacts from the company Produto para Linhas Preformados, PLP, were analyzed which are made of steel SAE 1010 and SAE 1020 and zinc coated by hot-dip galvanizing. Lots of samples from different manufacturers were selected, with different chemical composition and geometry, but belonging to rejected lots and approved lots in accordance with usual market standards. The rejections are due to problems related to the adhesion of the layer of zinc. The samples were submitted to optical microscopy test, scanning electron microscopy and X-ray diffractions for comparative checking of between the structures of zinc formed layers by hot -dip galvanizing. To verify the corrosion in coating failure, corrosion tests were performed in three different environments: urban environment considered to be low-polluted; environment simulating sea water, salt spray. There is no failure evidence between the zinc coating and the substrate structure; irregular coatings and not very well defined phases were found in the rejected parts. In regions with failures, the results show a behavior similar to the literature with the rapid formation of rust at the beginning of the exposure followed by a show oxidation. |
publishDate |
2009 |
dc.date.issued.fl_str_mv |
2009-08-17 |
dc.date.available.fl_str_mv |
2010-02-25 2020-05-28T18:07:34Z |
dc.date.accessioned.fl_str_mv |
2016-04-18T21:36:00Z 2020-05-28T18:07:34Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dspace.mackenzie.br/handle/10899/24216 |
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http://dspace.mackenzie.br/handle/10899/24216 |
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por |
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por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Presbiteriana Mackenzie |
dc.publisher.program.fl_str_mv |
Engenharia de Materiais |
dc.publisher.initials.fl_str_mv |
UPM |
dc.publisher.country.fl_str_mv |
BR |
dc.publisher.department.fl_str_mv |
Engenharia de Materiais |
publisher.none.fl_str_mv |
Universidade Presbiteriana Mackenzie |
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