Pipe Diffusion
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Caracterización de soldaduras cuproaluminotérmica en cañerías de conducción para la protección catódica
ABSTRACT Copper-Aluminothermic weld is a process in which welder is generated by thermofusion. The necessary heat is obtained by the aluminum reducing effect above copper oxide, creating a high temperature exothermic reaction, in which melt and overheated copper is the filler material [1].This technique is used to joint rails in railway industry, in groundin
Matéria (Rio J.). Publicado em: 19/07/2018
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2. AC Induced Corrosion of Underground Steel Pipelines under Cathodic Protection: III. Theoretical Approach with Electrolyte Resistance and Double Layer Capacitance for Mixed Corrosion Kinetics
In this series of papers, AC induced corrosion of steel pipe under cathodic protection was investigated. In this Part III, the most realistic model was devised, i.e., the cathodic current was composed of the reductions of dissolved oxygen partly controlled by diffusion and of the water following the Tafel law. The cathodic protection potential necessary to m
J. Braz. Chem. Soc.. Publicado em: 2017-08
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3. AC Induced Corrosion of Underground Steel Pipelines. Faradaic Rectification under Cathodic Protection: II. Theoretical Approach with Electrolyte Resistance and Double Layer Capacitance for Bi-Tafelian Corrosion Mechanism
AC corrosion enhancement of buried steel pipe is induced by high stray AC electromagnetic field and to the faradaic rectification due to non-linearity of current-potential characteristics. In Part I, this phenomenon was evaluated by neglecting the electrical resistance of soil electrolyte. In this part, we will examine when this resistance is no longer negli
J. Braz. Chem. Soc.. Publicado em: 2016-03
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4. WAX DEPOSITION STUDY IN A MULTIPHASE PIPE FLOW / ESTUDO DA DEPOSIÇÃO DA PARAFINA EM ESCOAMENTO MULTIFÁSICO EM DUTOS
O Petróleo é formado por um conjunto de hidrocarbonetos. No reservatório, devido à altas pressões e temperaturas, encontra-se na forma de líquido. Conforme o petróleo escoa, a pressão cai assim como a temperatura, devido a perda de calor para o ambiente marinho, causando a liberação do gás dissolvido no petróleo tornando o escoamento bifásico. A
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/04/2011
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5. Modelo matemático para avaliação hidrodinâmica em reatores tubulares operando em regime não-permanente / Mathematical model for hydrodynamic evaluation of pipe reactors with diffusion operated in non-steady flow
Mathematical models for hydrodynamic characteristics evaluation of reactors are commonly used however there is a lack of information in the literature concerning the application of mathematical modeling for non-steady state flow. In this thesis, it is presented a non-steady mathematical model to simulate the hydrodynamic behavior of pipe flow reactors with d
Publicado em: 2008
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6. ENHANCED DIFFUSION AND ELECTRICAL BEHAVIOR OF MISFIT DISLOCATIONS IN EPITAXIAL Si/Si(Ge)
This dissertation addresses enhanced or \"pipe\" diffusion of dopants along localized misfit dislocations (MD) using a \"model\" misfit dislocation structure at epitaxial Si/Si(Ge) interfaces and provides basic information on the merits of applicability of novel bandgap engineered devices. Pipe diffusion is modeled and explored to create pipe-like one dimens
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 1994