{"id":{"repo_id":"brazil-uerj","oai_identifier":"oai:pantheon.ufrj.br:11422/6495"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-uerj/oai:pantheon.ufrj.br:11422/6495","repository":{"repo_id":"brazil-uerj","name":"Brazil UERJ","base_url":"https://pantheon.ufrj.br/oai/request"},"display":{"title":"Estudo da fragilização por hidrogênio de um aço inoxidável super martensítico através da teoria da redução da energia interfacial","abstract":"One of the biggest problems faced in the production of oil and gas is the hydrogen embrittlement of steels. Throughout the years several models were proposed to explain this phenomenon. The aim of this work is to study the hydrogen embrittlement by using the theory of interfacial energy reduction. In order to apply this theory super martensitic stainless steel was used. This alloy is extensively used by the oil industry, due to its high mechanical resistance, toughness and corrosion resistance. However, this alloy is prone to hydrogen embrittlement due to the conditions in which it operates. The theory of interfacial energy reduction refers to the surface or interface energy reduction (Υ) along with the increase of the chemical potential (μ) of hydrogen, therefore favoring the formation and propagation of cracks in the material. Electrochemical permeation tests were performed by applying different cathodic potentials for the generation of hydrogen, from -950 mV/SCE to -2000 mV/SCE. Samples for tensile testes were hydrogenated by applying the same potentials. For this alloy, the hydrogen’s diffusivity obtained through low cathodic charging was of the order of 10-13 m²/s, whereas with the application of higher potentials the diffusivity was of the order of 10-12 m²/s, which corresponds to a quicker fill of the hydrogen traping sites. A reduction in the material’s ductility was observed with the increase of the hydrogen chemical potential. It was possible to apply the proposed theory and observe the reduction of the interfacial energy through the increase of the hydrogen chemical potential.","abstract_html":"One of the biggest problems faced in the production of oil and gas is the hydrogen embrittlement of steels. Throughout the years several models were proposed to explain this phenomenon. The aim of this work is to study the hydrogen embrittlement by using the theory of interfacial energy reduction. In order to apply this theory super martensitic stainless steel was used. This alloy is extensively used by the oil industry, due to its high mechanical resistance, toughness and corrosion resistance. However, this alloy is prone to hydrogen embrittlement due to the conditions in which it operates. The theory of interfacial energy reduction refers to the surface or interface energy reduction (Υ) along with the increase of the chemical potential (μ) of hydrogen, therefore favoring the formation and propagation of cracks in the material. Electrochemical permeation tests were performed by applying different cathodic potentials for the generation of hydrogen, from -950 mV/SCE to -2000 mV/SCE. Samples for tensile testes were hydrogenated by applying the same potentials. For this alloy, the hydrogen’s diffusivity obtained through low cathodic charging was of the order of 10-13 m²/s, whereas with the application of higher potentials the diffusivity was of the order of 10-12 m²/s, which corresponds to a quicker fill of the hydrogen traping sites. A reduction in the material’s ductility was observed with the increase of the hydrogen chemical potential. It was possible to apply the proposed theory and observe the reduction of the interfacial energy through the increase of the hydrogen chemical potential.","abstract_has_math":false,"creators":["Molter, Debora Lima"],"institution":"Universidade Federal do Rio de Janeiro","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Santos, Dilson Silva dos"],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017-08","date_published":"2017-08","updated_at":"2026-07-24T01:16:21Z","subjects":["Engenharia metalúrgica e de materiais","Aço inoxidável super martensítico","Energia interfacial"],"languages":["por"],"rights":["Acesso Aberto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11422/6495","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Santos, Dilson Silva dos"]},{"key":"dc:creator","label":"Author","values":["Molter, Debora Lima"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2019-02-15T16:25:33Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2026-05-16T03:04:53Z"]},{"key":"dc:date.issued","label":"Date","values":["2017-08"]},{"key":"dc:publisher","label":"Institution","values":["Universidade Federal do Rio de Janeiro"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"]},{"key":"dc:type","label":"Dc Type","values":["Dissertação"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engenharia metalúrgica e de materiais","Aço inoxidável super martensítico","Energia interfacial"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["por"]},{"key":"dc:rights","label":"Dc Rights","values":["Acesso Aberto"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11422/6495"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["One of the biggest problems faced in the production of oil and gas is the hydrogen embrittlement of steels. Throughout the years several models were proposed to explain this phenomenon. The aim of this work is to study the hydrogen embrittlement by using the theory of interfacial energy reduction. In order to apply this theory super martensitic stainless steel was used. This alloy is extensively used by the oil industry, due to its high mechanical resistance, toughness and corrosion resistance. However, this alloy is prone to hydrogen embrittlement due to the conditions in which it operates. The theory of interfacial energy reduction refers to the surface or interface energy reduction (Υ) along with the increase of the chemical potential (μ) of hydrogen, therefore favoring the formation and propagation of cracks in the material. Electrochemical permeation tests were performed by applying different cathodic potentials for the generation of hydrogen, from -950 mV/SCE to -2000 mV/SCE. Samples for tensile testes were hydrogenated by applying the same potentials. For this alloy, the hydrogen’s diffusivity obtained through low cathodic charging was of the order of 10-13 m²/s, whereas with the application of higher potentials the diffusivity was of the order of 10-12 m²/s, which corresponds to a quicker fill of the hydrogen traping sites. A reduction in the material’s ductility was observed with the increase of the hydrogen chemical potential. It was possible to apply the proposed theory and observe the reduction of the interfacial energy through the increase of the hydrogen chemical potential."]},{"key":"dc:title","label":"Title","values":["Estudo da fragilização por hidrogênio de um aço inoxidável super martensítico através da teoria da redução da energia interfacial"]}]}],"canonical_facts":{"dc:contributor.advisor":["Santos, Dilson Silva dos"],"dc:creator":["Molter, Debora Lima"],"dc:date.accessioned":["2019-02-15T16:25:33Z"],"dc:date.available":["2026-05-16T03:04:53Z"],"dc:date.issued":["2017-08"],"dc:description.abstract":["One of the biggest problems faced in the production of oil and gas is the hydrogen embrittlement of steels. Throughout the years several models were proposed to explain this phenomenon. The aim of this work is to study the hydrogen embrittlement by using the theory of interfacial energy reduction. In order to apply this theory super martensitic stainless steel was used. This alloy is extensively used by the oil industry, due to its high mechanical resistance, toughness and corrosion resistance. However, this alloy is prone to hydrogen embrittlement due to the conditions in which it operates. The theory of interfacial energy reduction refers to the surface or interface energy reduction (Υ) along with the increase of the chemical potential (μ) of hydrogen, therefore favoring the formation and propagation of cracks in the material. Electrochemical permeation tests were performed by applying different cathodic potentials for the generation of hydrogen, from -950 mV/SCE to -2000 mV/SCE. Samples for tensile testes were hydrogenated by applying the same potentials. For this alloy, the hydrogen’s diffusivity obtained through low cathodic charging was of the order of 10-13 m²/s, whereas with the application of higher potentials the diffusivity was of the order of 10-12 m²/s, which corresponds to a quicker fill of the hydrogen traping sites. A reduction in the material’s ductility was observed with the increase of the hydrogen chemical potential. It was possible to apply the proposed theory and observe the reduction of the interfacial energy through the increase of the hydrogen chemical potential."],"dc:identifier.uri":["http://hdl.handle.net/11422/6495"],"dc:language":["por"],"dc:publisher":["Universidade Federal do Rio de Janeiro"],"dc:publisher.department":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"],"dc:rights":["Acesso Aberto"],"dc:subject":["Engenharia metalúrgica e de materiais","Aço inoxidável super martensítico","Energia interfacial"],"dc:title":["Estudo da fragilização por hidrogênio de um aço inoxidável super martensítico através da teoria da redução da energia interfacial"],"dc:type":["Dissertação"]},"updated_at":"2026-07-24T01:16:21Z"}