Corrosion Testing
Mostrando 13-24 de 38 artigos, teses e dissertações.
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13. Análisis de falla de los bujes del tornillo de una extrusora utilizada para procesar pintura en polvo
ABSTRACT This article aims to present the failure analysis of extruder screw bushings used for the manufacture of powder paint. Two bushings, one from the transition zone and one from the metering zone were selected to carry out the study. Chemical composition and microstructural analysis, hardness testing and a detailed analysis of the failed surfaces by vi
Matéria (Rio J.). Publicado em: 22/06/2017
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14. Controlled Pre-Corrosion Attack and Ultrasonic Fatigue Endurance of Titanium Alloy Ti-6Al-4V
Abstract Ultrasonic fatigue tests were carried out on titanium alloy Ti-6Al-4V on the base material and the pre-corroded specimen to assess the pre-corrosion effect on the fatigue life of this alloy. The pre-corrosion was obtained by immersion of specimens in an acid solution: hydrochloric acid with 1.4 of pH during 8 and 16 minutes. All ultrasonic fatigue t
Lat. Am. j. solids struct.. Publicado em: 2017-03
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15. Analisys of hot deformation behavior of super duplex stainless steel UNS S32760 through processing maps
Abstract The need for materials with higher strength and corrosion resistance in corrosive environments, such as in the oil extraction in saline media, has led to the use of super duplex stainless steels in projects such as the Pre-sal. The manufacture of these materials involves the step of thermomechanical processing, whose performance depends on the worka
Rem: Rev. Esc. Minas. Publicado em: 2016-06
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16. Investigation on AA5083/AA7075+Al2O3 Joint Fabricated by Friction Stir Welding: Characterizing Microstructure, Corrosion and Toughness Behavior
The effects of Al2O3 reinforcements on microstructure, corrosion and toughness properties of dissimilar aluminum alloys joint fabricated by friction stir welding (FSW) technique were explored in this research. AA5083-H116 and AA7075-T6 were selected as the primary base materials. FSW was conducted with and without reinforcing particles through the joint line
Mat. Res.. Publicado em: 2015-12
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17. Electroless Plating of Ni-P-W Coatings Containing Scattered Nb2O5 on Sintered NdFeB Substrate
AbstractThe ternary Ni-P-W coatings containing scattered Nb2O5particles were deposited on the sintered NdFeB substrates by electroless plating. The effect of experimental processing parameters on the deposition rate was investigated during electroless plating. The coatings performance, such as corrosion resistance, interfacial adhesion strength and micro-har
Mat. Res.. Publicado em: 2015-10
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18. Wear and friction of composites of an epoxy with boron containing wastes
Abstract Polymer surface coatings provide superior adhesion to substrates, some flexibility and corrosion resistance. On the other hand, 400,000 ton of boron wastes are generated each year. We have developed polymer composites based on epoxy resins containing up to 50 wt. % of boron wastes and determined their pin-on-disk dynamic friction, w
Polímeros. Publicado em: 2015-06
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19. Fretting corrosion tests on orthopedic plates and screws made of ASTM F138 stainless steel
Introduction Although there has been significant progress in the design of implants for osteosynthesis, the occurrence of failures in these medical devices are still frequent. These implants are prone to suffer from fretting corrosion due to micromotion that takes place between the screw heads and plate holes. Consequently, fretting corrosion has been the s
Res. Biomed. Eng.. Publicado em: 2015-04
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20. Estudo da corrosão e corrosão-fadiga em ligas de Al e Al - Li de alta resistência para aplicação aeronáutica / Study behaviour of corrosion and corrosion fatigue in high strength Al and Al - Li alloys for aeronautic application
The aircraft industry is constantly looking for improved materials which offer benefits in terms of performance, weight and cost savings. Corrosion and fatigue of aluminium alloys are major issues in the service life assessment of aircraft structures and in the management of aging air fleets. The aim of this study was to evaluate the corrosion and corrosion
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/09/2012
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21. Aplicações de corrosão por plasma usando reatores ICP e RIE para tecnologia MEMS / Plasma etching applications using ICP and RIE reactors for MEMS technology
This thesis is based on etching processes applications in cold plasmas (room temperature) using RIE (Reactive Ion Etching) and ICP (Inductively Coupled Plasma), as reactors, applied to specific areas of microelectronics and MEMS devices in semiconductors industries and laboratories. Five applications are presented: Thinning gate CMOS Transistor - conventiona
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/08/2012
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22. LaCrO3 composite coatings for AISI 444 stainless steel solid oxide fuel cell interconnects
Doped lanthanum chromite-based ceramics are the most widely used interconnector material in solid fuel cells (SOFC) since they exhibit significant electrical and thermal conductivity, substantial corrosion resistance and adequate mechanical strength at ambient and high temperatures. The disadvantage of this material is its high cost and poor ductility. The a
Mat. Res.. Publicado em: 23/10/2012
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23. Desenvolvimento de uma infraestrutura para o estudo de desgaste erosivo e corrosão em bombas centrífugas submersas da indústria do petróleo / Development of an infrastructure to study erosive wear of electrical submersible pumps
A produção de petróleo, com a descoberta de campos, profundos e ultraprofundos, está cada vez mais difícil de ser executada, pois muitos desses poços não apresentam pressão suficiente para elevar o óleo até a superfície naturalmente. Outro grande problema enfrentado são poços que já produziram por longos períodos de tempo e que já apresentam
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/08/2011
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24. Estudo do comportamento mecânico da liga alumínio cobre 2024 solubilizada e envelhecida para aplicações aeronáuticas
Aluminum alloys present low specific density, good strength, and high corrosion resistance under common environments. Aluminum-Copper 2024 alloy is one of the most widely used alloy in aircraft fuselage structures due to its good mechanical properties. The microstructure of the alloy was observed by optical microscopy showing elongated grains caused from the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/08/2011