Influência da porcentagem de ferro na resistência a corrosão de revestimento depositado por soldagem de liga de inconel 625 sobre aço carbono

Página do item simplificado
dc.contributor.advisor. Vatavuk, Jan
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/2607688973456560por
dc.contributor.authorCunha, Alexandre Borghi
dc.creator.Latteshttp://lattes.cnpq.br/4745483086787920por
dc.date.accessioned2020-12-11T13:00:37Z
dc.date.accessioned2021-02-08T22:02:07Z
dc.date.available2021-02-08T22:02:07Z
dc.date.issued2020-07-17
dc.description.abstractThis work aims to evaluate the corrosion resistance of specimens with metallic welding overlay in the MIG process with Inconel 625 alloy (ERNiCrMo-3) with iron percentages in the last layer of the overlay varying among 5%, 8%, 15% and 20%. Corrosion tests were carried out according to ASTM G-48, method A, having as acceptance criterion the NORSOK M-601 standard with test temperature of 50°C and time of 24 hours, as applied in manufacturing techniques, each sample of tests with different percentages of iron, in order to check which iron limit will not affect the corrosion resistance properties of the alloy. The percentage of iron was evaluated by means of chemical analysis in the specimens before the corrosion test. The metallographic analysis indicated a dendritic structure with relatively small secondary branch spacing, due to the high cooling rate in the solidification process imposed by the welding deposition process. The interdendritic regions indicated the precipitation of phases that, according to the bibliographic review, can collaborate with the corrosion process. After the corrosion test, an analysis of the topography resulting from the chemical attack was carried out in order to verify the presence of pitting, and to characterize this region by Scanning Electron Microscopy (SEM). The presence of secondary phases was observed in the boundary of the dendrites in this alloy of Inconel 625. Corrosion due to pitting formation only began to be noticed for the highest iron content (20%), indicating that the requirements in terms of standards for these overlay it is quite conservative in these test conditions.eng
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superiorpor
dc.formatapplication/pdf*
dc.identifier.citationCUNHA, Alexandre Borghi. Influência da porcentagem de ferro na resistência a corrosão de revestimento depositado por soldagem de liga de inconel 625 sobre aço carbono. 2020. 96 f. Dissertação( Engenharia de Materiais e Nanotecnologia) - Universidade Presbiteriana Mackenzie, São Paulo, 2020.por
dc.identifier.urihttp://dspace.mackenzie.br/handle/10899/27913
dc.keywordsinconel 625por
dc.keywordsoverlaypor
dc.keywordscoatingpor
dc.keywordscorrosionpor
dc.keywordsMIG-MAGpor
dc.keywordsweldingpor
dc.languageporpor
dc.publisherUniversidade Presbiteriana Mackenziepor
dc.rightsAcesso Abertopor
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectinconel 625por
dc.subjectoverlaypor
dc.subjectrevestimentopor
dc.subjectcorrosãopor
dc.subjectMIG-MAGpor
dc.subjectsoldagempor
dc.subject.cnpqCNPQ::ENGENHARIASpor
dc.titleInfluência da porcentagem de ferro na resistência a corrosão de revestimento depositado por soldagem de liga de inconel 625 sobre aço carbonopor
dc.typeDissertaçãopor
local.contributor.board1Massi, Marcos
local.contributor.board1Latteshttp://lattes.cnpq.br/1992108703603111por
local.contributor.board2Andrade, Arnaldo Homobono Paes de
local.publisher.countryBrasilpor
local.publisher.departmentEscola de Engenharia Mackenzie (EE)por
local.publisher.initialsUPMpor
local.publisher.programEngenharia de Materiais e Nanotecnologiapor
Arquivos
Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
Alexandre Borghi Cunha_protegida.pdf
Tamanho:
3.7 MB
Formato:
Adobe Portable Document Format
Descrição:
Baixar
Coleções
Engenharia de Materiais e Nanotecnologia - Dissertações - EE Higienópolis