Engenharia de Materiais (UACSA)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2913
Siglas das Coleções:
APP - Artigo Publicado em Periódico
TAE - Trabalho Apresentado em Evento
TCC - Trabalho de Conclusão de Curso
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4 resultados
Resultados da Pesquisa
Item Estudo da resistência à corrosão do revestimento a base da liga Zn-Ni obtido por eletrodeposição em aço SAE 1020(2023-09-18) Gomes, Anyelle Maria Torres; Santos, Aureliano Xavier dos; http://lattes.cnpq.br/0810494477757052; http://lattes.cnpq.br/9310446438519382Concern for the environment and environmental laws increasingly increase the desire to reduce waste disposal costs, with this in mind, a good alternative is the use of metal biodigesters. However, the organic material and the product of the biochemical process reduce the useful life of this equipment. Aiming for good durability and efficiency of this equipment, studies have been carried out to apply coatings with materials that are highly resistant to corrosion through the electrodeposition process. The objective of this study was to evaluate the corrosion resistance of coatings based on the Zn-Ni alloy obtained by electrodeposition on SAE 1020 steel sheet. The process parameters, bath temperature and current density used to obtain coatings with the alloy Zn-Ni were optimized using factorial experimental design and the results analyzed by the Response Surface Methodology (MSR). The Ni-Zn alloy coatings were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical corrosion measurements by Linear Potentiodynamic Polarization (PPL) and Electrochemical Impedance Spectrometry (EIE). The coating with the alloy Zn68.9Ni31.1 at.%, deposited with current density 25 A/cm2 and bath temperature 60oC, presented the best results against corrosion, as it presented the lowest values of corrosion current, thus indicating a less dissolution of the coating.Item Efeito dos parâmetros de soldagem em revestimentos a base de níquel nas medidas eletroquímicas de corrosão(2024-09-30) Santos, Paulo Vinícius Lima dos; Santos, Aureliano Xavier dos; http://lattes.cnpq.br/0810494477757052; https://lattes.cnpq.br/7584847021954297Metallic materials are widely used in industry, including API 5L X70 steel, used for oil transportation. However, these steels are susceptible to corrosion due to the aggressive environment. As a result, various studies have been carried out to mitigate the effect of corrosion. Solid wire welding processes are used to weld coatings for this purpose, but they require information from the user to determine the most suitable welding conditions. The aim of this work was to study the influence of welding parameters for Inconel 625-based coatings on electrochemical corrosion measurements. To optimize the experiments, a full factorial design was used to evaluate the welding parameters, welding speed and feed rate. After welding, the samples were cross-sectioned and dilution calculations and iron content measurements were made by EDX. Finally, to reveal the corrosion resistance, the electrochemical technique by linearpotentiodynamic polarization was used, through polarization resistance, corrosion potential, corrosion current.Item Análise da resistência a corrosão do aço API 5L X70 revestido com inconel 625 por soldagem plasma pó e por arco submerso(2021-12-09) Ferreira, Beatriz Cândida de Farias; Santos, Aureliano Xavier dos; http://lattes.cnpq.br/0810494477757052; http://lattes.cnpq.br/8533374114394812Annually, the oil industry invests large amounts in pipeline maintenance, mainly in anti- corrosion measures. Thus, solutions are sought that combine low cost, reproducibility and consistent properties. One of them is the use of materials that have high mechanical and anti- corrosive properties in the form of coatings that can be deposited by welding. This study aimed to evaluate the effects of different welding parameters on the corrosion resistance of inconel 625 alloy coatings deposited by API 5L X70 steel by the PTA welding process , evaluate samples with higher and lower dilution and use the parameters of these experiments to perform SAW submerged arc welding coating in order to compare the processes. The parameters were optimized through factorial experimental design and the results analyzed by the Response Surface Methodology (MSR). The samples were mainly evaluated by dilution (D), iron content (Fe) and resistance to corrosion by linear potentiodynamic polarization (PPL).Item Influência da tensão, velocidade de alimentação e DBCP na resistência à corrosão de revestimentos à base da liga inconel 625 depositada por MIG(2019-07-09) Lima, Igor Jaloto de; Santos, Aureliano Xavier dos; http://lattes.cnpq.br/0810494477757052Annually, high investments are made in the maintenance of pipelines used in the oil industry around the globe. Thus, solutions are sought that combine low cost, reproducibility and properties that are consistent, mainly against corrosion. One of these is the use of materials that have high mechanical and anticorrosive properties in the form of coatings, which could be deposited by welding. The objective of this study was to evaluate the effects of different welding parameters on the corrosion resistance of coatings based on the Inconel 625 alloy, deposited by MIG process in API 5L X70 steel. The parameters were optimized using the factorial experimental design and the results analyzed by the Response Surface Methodology (RSM). Three deposits with ½ overlap were performed by MIG welding process, followed by a cross section cut in the samples for analysis of the dilution, iron content and corrosion resistance by linear potentiodynamic polarization (PPL) through corrosion potential (Ecorr), corrosion current (Icorr) and polarization resistance (Rp). The coatings obtained presented values of the dilution ranging from 5.8% to 15.01%. The coating that presented lower dilution value, also was the one with lower Icorr and Fe, besides higher Rp and Ecorr, thus, greater corrosion resistance.