Wear And Corrosion
Mostrando 1-12 de 73 artigos, teses e dissertações.
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1. Desgaste y corrosión de recubrimientos de PLGA sobre titanio en contacto con hueso y fluido sinovial
ABSTRACT In this work, the synergism between wear and corrosion was evaluated in titanium specimens covered by PLGA. The tests were carried out in a tribocorrosion machine, taking into account two variables: scratch ve-locity and applied load. A bipotentiostat was adapted to obtain the potentiostatic curves and Tafel in resting, moving and wear-corrosion con
Matéria (Rio J.). Publicado em: 16/09/2019
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2. Nitretação por descargas elétricas da liga Ti-6Al-4V com adição de pó abrasivo SiC ao fluido dielétrico
RESUMO O processo de nitretação que usa Usinagem por Descargas Elétricas é um método que associa a capacidade de usinar superfícies complexas com a obtenção de tratamento termoquímico de nitretação. A fonte de nitrogênio é proveniente da uréia, que compõe o fluido dielétrico juntamente com água deionizada. A liga de titânio Ti-6Al-4V possui
Matéria (Rio J.). Publicado em: 16/09/2019
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3. Influence of the Gas Pressure of Plasma Nitriding on the Structural, Mechanical and Tribological Surface Properties of AISI 316L
In this paper, the influence of gas nitriding (80% H2-20% N2) pressure (between 3 and 7 Torr) on the modification of surface properties of AISI 316L stainless steel is examined. The structural, mechanical, tribological and electrochemical properties of the layer produced in disk samples were studied. The samples’ characteristics were determined by scanning
Mat. Res.. Publicado em: 15/07/2019
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4. Presence of iron in polymers extruded with corrosive contaminants or abrasive fillers
Abstract Off-site measurements of the dimensions of extruder screws are used to monitor their wear. This wear causes the presence of metals in the processed polymer. We detected the presence of iron in polymers processed with corrosive contaminants or abrasive fillers. To this end we processed poly(ethylene terephthalate), PET, pure or contaminated with poly
Polímeros. Publicado em: 10/06/2019
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5. Corrosion and Micro-abrasive Wear Behaviour of 2524-T3 Aluminium Alloy with PAni-NPs/PSS LbL Coating
In this paper, we present an alternative method to obtain thin films for coating protection on the surface of the AA2524-T3 Al-alloy by using the Layer-by-Layer (LbL) technique. The LbL films were fabricated by alternated immersion of the Al-alloy into a poly(styrene sulfonate) (PSS) and polyaniline nanoparticles (PAni-NPs) solutions, obtaining a PAni-NPs/PS
Mat. Res.. Publicado em: 06/06/2019
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6. Boriding and boronitrocarburising effects on hardness,wear and corrosion behavior of AISI 4130 steel
ABSTRACT The effects of boriding and boronitrocarburising surface treatments on the microstructure and mechanical properties of AISI 4130 steel have been investigated. Pack boriding was carried out at 1223 K for 5 h and 8 h, while the double treatment of boronitrocarburising consisted of salt bath nitrocarburising at 853 K for 6 h followed by pack boriding a
Matéria (Rio J.). Publicado em: 20/05/2019
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7. Corrosion-cavitation-erosion: surface morphology study of a carbon steel in a multiphasic saline bath
ABSTRACT During the production of petroleum and gas, the equipments employed for this activity are subjected to synergetic wear mechanisms, such as corrosion, corrosion-cavitation and corrosion-cavitation-erosion. Laboratory experiments has been performed to reproduce some of these mechanisms, however, sometimes the tests is not capable to recreate the compl
Matéria (Rio J.). Publicado em: 20/05/2019
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8. Estudo de recobrimentos de silicato e aluminato obtidos por oxidação por plasma eletrolítico em liga de alumínio
RESUMO As ligas de Alumínio são utilizadas para diversas finalidades e para a maioria dos casos a superfície desses materiais precisa ser modificada a fim de se melhorar propriedades como resistência ao desgaste e corrosão. Neste cenário, o processo de oxidação por plasma eletrolítico (PEO) surge como uma alternativa viável para produção de recob
Matéria (Rio J.). Publicado em: 20/05/2019
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9. Nitretação a plasma da junta soldada do aço inoxidável super duplex SAF 2507
RESUMO Os aços inoxidáveis superduplex (AISD) apresentam em sua microestrutura as fases ferrita e austenita, de modo a conciliar boas propriedades mecânicas e de resistência à corrosão. Estes materiais possuem grande aplicação na indústria de extração de petróleo e na petroquímica. Quando estão sujeitos a estas aplicações, os dutos de AISD so
Matéria (Rio J.). Publicado em: 20/05/2019
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10. Morphology of the DIN 100Cr6 Case Hardened Steel after Plasma Nitrocarburizing Process
Nitrocarburizing is considered one of the most important thermochemical treatments for surface modification of metallic materials and involves the simultaneous diffusion of nitrogen and carbon onto the surface. Understanding and controlling the formation of the nitrocarburized layer have considerable industrial interest due to the improvements regarding wear
Mat. Res.. Publicado em: 04/04/2019
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11. Effect of Dilution on the Microstructure and Properties of CoCrMoSi alloy Coatings Processed on High-Carbon Substrate
The Laves phase reinforced CoCrMoSi alloy system has emerged as a candidate material to protect the surface of components to withstand harsh environments under wear and/or corrosion. However, previous reports have raised some concerns and restricted a wider selection of iron-based substrates to be coated, especially limiting the carbon content. This work aim
Mat. Res.. Publicado em: 14/11/2018
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12. Effect of Bead Overlapping on the Microstructure and Mechanical Properties of CoCrWC Alloy Coatings
In order to protect industrial components, cobalt base alloys are applied as hardfacing material through welding techniques. A large number of papers have shown that controlling the chemical composition is a key point regarding the wear and corrosion resistance of coatings. This paper investigated the effect of bead overlapping on the microstructure and prop
Mat. Res.. Publicado em: 17/09/2018