Página 1 dos resultados de 17 itens digitais encontrados em 0.003 segundos

Influence of cerium (IV) ions on the inorganic and organic phase for preparation of a siloxane-PMMA based film on tin plate substrate

Sarmento, V. H V; Diniz, R. N.; Benedetti, A. V.; Santilli, C. V.; Suegama, P. H.; Aoki, I. V.
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Conferência ou Objeto de Conferência Formato: 2138-2147
ENG
Relevância na Pesquisa
26.41%
Tinplate is one of the most widely used food canning materials, however, there are significant problems related to the use of tinplate cans, such as alterations in sensory features affecting food quality and corrosion phenomena of the canning material. To avoid corrosion problems different methods have been used for the passivation of tinplate such protective lacquers or different kinds of corrosion inhibitors (chromate and dichromate). However, chromates and dichromates are extremely harmful to the environment and can cause carcinogenic tumors to humans. An option, protective coatings obtained by the sol-gel process, act as a physical barrier, which isolates the surface of metal protecting from the corrosive agents. The aim of this work is to study the influence of addition of cerium (IV) ions in the inorganic and organic part of sol-gel processing in the formation of hybrid coatings based on siloxane-PMMA on tin plate. The coatings were obtained by dip-coating technique and evaluated by open circuit and impedance measurements, linear polarization and polarization curves obtained in 3.5% NaCl solution. The results have clearly shown the improvement on the protective properties of the Ce 4+ modified film when added into the organic phase...

Carbon nanotube-reinforced siloxane-PMMA hybrid coatings with high corrosion resistance

Hammer, P.; Dos Santos, F. C.; Cerrutti, B. M.; Pulcinelli, S. H.; Santilli, C. V.
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 601-608
ENG
Relevância na Pesquisa
46.44%
Siloxane-polymethyl methacrylate hybrid films containing functionalized multiwall carbon nanotubes (CNTs) were deposited by dip-coating on carbon steel substrates from a sol prepared by radical polymerization of methyl methacrylate and 3-methacryloxy propyl-trimethoxysilane, followed by hydrolytic co-polycondensation of tetraethoxysilane. The correlation between the structural properties and corrosion protection efficiency was studied as a function of the molar ratio of nanotubes carbon to silicon, varied in the range between 0.1% and 5%. 29Si nuclear magnetic resonance and thermogravimetric measurements have shown that hybrids containing carbon nanotubes have a similar degree of polycondensation and thermal stability as the undoped matrix and exhibit and excellent adhesion to the substrate. Microscopy and X-ray photoelectron spectroscopy results revealed a very good dispersion of carbon nanotubes in the hybrid matrix and the presence of carboxylic groups allowing covalent bonding with the end-siloxane nodes. Potentiodynamic polarization curves and electrochemical impedance spectroscopy results demonstrate that CNTs containing coatings maintain the excellent corrosion protection efficiency of the hybrids, showing even a superior performance in acidic solution. The nanocomposite structure acts as efficient corrosion barrier...

Complexos de poli(vinilpiridinas) / cobre e tiocianato

Santana, Adriana Lídia
Fonte: Universidade Federal de Santa Catarina Publicador: Universidade Federal de Santa Catarina
Tipo: Tese de Doutorado Formato: 128 p.| il., grafs., tabs.
POR
Relevância na Pesquisa
16.16%
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2009; Neste trabalho estudo-se a formação de complexos de poli(vinilpiridinas) com íons cobre e tiocianato, e de filmes passivantes sobre eletrodo de cobre em meio contendo poli(2-vinilpiridina) [P2VP] ou poli(4-vinilpiridina) [P4VP] e tiocianato. Os complexos foram caracterizados por espectroscopia na região do infravermelho, termogravimetria (TG) e calorimetria exploratória diferencial (DSC). A interação polímero/metal ocorre pela formação de ligação entre o íon Cu(II) e o átomo de nitrogênio do anel, bem como pela coordenação do ânion tiocianato através do átomo de nitrogênio. A oxidação do cobre resulta na formação de compostos de coordenação depositados sobre a superfície do cobre na forma de filmes, que apresentam características dependentes da estrutura do polímero. Com P2VP foram obtidos complexos com cobre monovalente, enquanto que em meio de P4VP foi observada a formação de complexos com cobre divalente e tiocianato coordenado através do átomo de nitrogênio. Os complexos sintetizados eletroquimicamente e pela mistura física dos componentes mostraram propriedades com relação á estrutura eletrônica...

Palace of Justice Raymundo Faoro : access for all to brazilian modern heritage sites

Ferreira, Oscar Luís; Máximo, Marco Aurélio da Silva
Fonte: Universidade de Brasília Publicador: Universidade de Brasília
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
15.96%
Brasilia’s urban landscape is almost entirely consisted of modern architecture. Buildings constructed from the 1960s to the present day follow Le Corbusier’s concepts proposed in 1926: the supports, roof-gardens, the free ground plan, and horizontal windows and free façade. Besides this, modern Brazilian architecture exhibits characteristics such as the presence of crafts, integrated arts, lightness, symbolism; and the influence of the Promenade of Le Corbusier’s. All these elements combined define the design of the modern space usually materialized with apparent concrete, glass and steel, among other materials. These elements are commonly used by preservationists during interventions in historic heritages, due to its distinguishable characteristics in terms of material consistency and patina. However, the presence of patina is not so easily accepted in modern heritage buildings. In this scenario, steel corrosion, small cracks in the concrete and patches on the coating are signs of pathologies and do not mean value, such as age-value. Authenticity is a tool to appraise values normally present on the fabric of the heritage and on the patina; but how to assess modern buildings’ significance where material consistency alone is no longer a defining characteristic of the heritage? This paradigm involves the understanding of modern architecture not only by its physical consistency...

The role of composition, structure and morphology on the electrical, optical and electrochemical responses of AlNxOy films

Borges, Joel; Martin, N.; Barradas, N. P.; Alves, E.; Eyidi, D.; Girardeau, T.; Fonseca, C.; Vaz, F.; Marques, L.
Fonte: Organizing Committee of EuroMat 2013 Publicador: Organizing Committee of EuroMat 2013
Tipo: Conferência ou Objeto de Conferência
Publicado em 08/09/2013 ENG
Relevância na Pesquisa
16.16%
Metallic (Me) oxynitrides (MeNxOy) are an attractive class of materials due to a unique set of versatile properties in different technological domains such as protective applications (wear, diffusion and corrosion-resistance), decorative coatings, gas barriers, microelectronics, optoelectronics, solar cells, etc. Among the group of oxynitrides, aluminium oxynitride (AlNxOy) presents some interesting characteristics to be used in different technological fields, since it may combine the behaviour of metallic aluminium, and those of the base binary systems: aluminium nitride, known for its semiconducting and piezoelectric properties and aluminium oxide, for its protective and insulating performances. In this work, thin films of AlNxOy were prepared by reactive DC magnetron sputtering, using a pure Al target and an Ar/(N2,O2) gas mixture. The overall set of results suggests the formation of a nanocomposite-like material for some stoichiometries, with Al nanoparticles embedded in an AlNxOy matrix, forming a percolating network. This particular microstructure induced a wide variation in electrical properties [1], such as a gradual transition from positive to negative temperature coefficients of resistance (TCR) as the (N+O)/Al atomic ratio increases; as well as distinct optical responses [2]...

Scalable multiphase microchemical systems for direct fluorination

De Mas Valls, Nuria, 1975-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 235 leaves; 9693715 bytes; 9693522 bytes; application/pdf; application/pdf
ENG
Relevância na Pesquisa
25.96%
Microchemical systems or microreactors refer to a new class of continuous reactors that have feature sizes in the submillimeter range. In particular, microfabricated chemical reactors are built using silicon-based photolithographic fabrication techniques that were originally developed to create integrated microelectronic circuits. Because silicon microfabrication allows precise control over the geometry of the reactor features down to the micron scale, as well as the integration of a variety of sensors into the fluidic path, microfabricated reactors are promising as versatile chemical synthesis tools that present capabilities exceeding those of their macroscale counterparts. In addition, small reactor volumes enhance the control of fast exothermic reactions and allow new reaction chemistries deemed too difficult to control in conventional reactors to be carried out safely. One example of such chemistry is the direct fluorination of organic molecules. This thesis addresses the design, fabrication, and application of a gas-liquid microreactor as a discovery tool for the synthesis of fluorinated compounds by direct fluorination. A microfabrication methodology was developed to create microfluidic channels chemically compatible with the highly corrosive direct fluorination environment. Electron-beam evaporated nickel in combination with thermally grown silicon oxide coatings were employed as corrosion barriers for microchannels formed in a silicon substrate. The direct fluorination of toluene was safely demonstrated at room temperature and on preparative yields for substrate concentrations ranging between 0.1 and 1.0 M. The product distribution was studied as a function of the number of fluorine equivalents and solvent type.; (cont.) Extensive gas-liquid flow visualization studies were conducted in single and dual-channel devices with triangular cross section (channel hydraulic diameter of [approx.]224 [mu]m) using pulsed-laser fluorescence and continuous-wave microscopy. A gas-liquid flow regime map containing slug and annular-dry flows was obtained at flow conditions relevant for gas-liquid microchemical systems...

Propriedades tribocorrosivas de multicamadas TI/TIN: dependência do comprimento de modulação e proporção da camada cerâmica

Jacobsen, Saulo Davila
Fonte: Pontifícia Universidade Católica do Rio Grande do Sul; Porto Alegre Publicador: Pontifícia Universidade Católica do Rio Grande do Sul; Porto Alegre
Tipo: Dissertação de Mestrado
PORTUGUêS
Relevância na Pesquisa
15.96%
A aplicação de revestimentos de nitreto de titânio como camada protetora de aços em situações com características tribocorrosivas tem obtido muito sucesso ao longo dos anos. Entretanto, a resistência contra corrosão aquosa só é obtida quando a camada protetora for destituída de imperfeições, pois o ataque corrosivo se propaga em defeitos associados à poros, contorno de grãos, e à uma morfologia colunar encontrada em filmes monolíticos depositados por sputtering. Estudos recentes mostraram que uma possível solução para evitar a propagação da estrutura colunar é a produção de revestimentos tipo multicamadas, promovendo assim barreiras para o meio agressivo. Em condições específicas, filmes nanoestruturados do tipo multicamadas apresentam valores extremamente elevados de dureza, de acordo com a variação do seu período de modulação. O objetivo deste trabalho é mostrar o comportamento tribocorrosivo de multicamadas de Ti/TiN, depositados pela técnica de magnetron sputtering, através de diversos comprimentos de modulação e diferentes proporções de TiN para cada modulação. Medidas de Espectrometria de Retroespalhamento de Rutherford (RBS) e de refletividade de raio X (XRR) mostraram que as multicamadas foram obtidas com sucesso em seu processo de deposição. As propriedades mecânicas apresentadas por esses revestimentos mostraram características de super-rede de dureza e as propriedades corrosivas aliadas às medidas qualitativas de desgaste mecânico (H/E) mostraram elevado grau de proteção...

Experimental and numerical investigations with respect to the material properties of geotechnical barriers; Experimental and Numerical Investigations with Respect to the Material Properties of Geotechnical Barriers; Experimentelle und numerische Untersuchungen zum Materialverhalten Geotechnischer Barrieren

Engelhardt, Irina
Fonte: Universidade de Tubinga Publicador: Universidade de Tubinga
Tipo: Dissertação
DE_DE
Relevância na Pesquisa
26.11%
Quellfähige Tone spielen eine bedeutende Rolle bei aktuellen Konzepten zur Endlagerung hoch-radioaktiver Abfälle in kristallinem Wirtsgestein. Zum Schutz vor dem Austritt radioaktiver Substanzen wurden Multi-Barrieren-Konzepte entwickelt. Die Barrieren bestehen aus einem Kupferkanister, aus kompaktiertem Bentonit als Verfüllmaterial (die Geotechnische Barriere) sowie dem Wirtsgestein. Durch Korrosion der Kupferkanister oder Radiolyse kann bei hoch-radioaktiven Abfällen Wasserstoff entstehen. Durch die in diesem Konzept vorgesehene Aufstättigung des Verfüllmaterials mit Kluftwasser wird seine Permeabilität stark reduziert, so dass sich Wasserstoffgas in dem Raum zwischen Kanister und der Geotechnischen Barierre aufstauen kann. Durch diese Gasansammlung kann der Eindringdruck des Verfüllmaterials überschritten werden, und es kommt dann zu einer Migration der Gase durch die Geotechnische Barriere. Zur Untersuchung der thermischen und hydraulischen Eigenschaften des Verfüllmaterials unter Bedingungen, die in untertätigen Endlagern für radioaktiven Abfall herrschen, wurden verschiedene Laborexperimente konzipiert. Alle Experimente wurde mit Natrium- (SPV Volclay) oder Kalzium-Bentonit (Calcigel), der mit Gesteinsmehl vermischt wurde...

High Burn-Up UO2 Fuel Corrosion under Reducing Conditions

FORS Patrick; CARBOL Paul; VAN WINCKEL Stefaan; SPAHIU K.
Fonte: American Nuclear Society (ANS) Publicador: American Nuclear Society (ANS)
Tipo: Contributions to Conferences Formato: Printed
ENG
Relevância na Pesquisa
26.34%
A fission product and Pu rich porous structure forms at the radial periphery of LWR fuel pellet at a local burnup of ~70 GWd/tHM. This restructured fuel region, usually referred to as rim, will be the first part of the spent fuel to be exposed to groundwater in the event of failure of all the containment barriers. The corrosion behavior of rim-structured high burn-up UO2 fuel under conditions expected in a deep geologic repository is not fully understood today. To address this issue, a corrosion experiment on rim-containing fragments of high burnup UO2 fuel has been performed in a titanium autoclave. To simulate deep bedrock repository conditions, the autoclave was filled with a dilute carbonate groundwater, and pressurized to 4 MPa with H2. The results obtained during the first year of corrosion showed that the concentration of 238U in the leachate decreased below 5·10-10 M, the plutonium concentration fell below 6·10-12 M while the 137Cs concentration remained constant. Removal of the instant release fraction gave new insight of the chemical behavior of U, Pu and Cs under such conditions. Altogether, it was shown that the radiolytic oxidants produced by the intense a-, ß-, and ¿-radiation field of the high burn-up fuel were consumed in the system under study.; JRC.DG.E.5-Nuclear chemistry

IMPACT OF THE IRRADIATION HISTORY OF NUCLEAR FUELS ON THE CORROSION BEHAVIOUR IN A DISPOSAL ENVIRONMENT

SERRANO PURROY Daniel; GLATZ Jean-Paul
Fonte: KIT Scientific Publishing Publicador: KIT Scientific Publishing
Tipo: Contributions to Conferences Formato: Printed
ENG
Relevância na Pesquisa
26.16%
Nuclear fuel becomes a very heterogeneous material during irradiation both from a structural and from a compositional point of view. Also the composition, i.e. the content of higher actinides formed by neutron capture and the fission product content increases with burn-up. Detailed post irradiation examination using optical, scanning or transmission electron microscopy, electron microprobe analysis, Knudsen cell, gamma scanning but also chemical analysis, allow to characterise the fuel changes during irradiation. It was shown that the irradiation history and here first of all the linear power reached in the fuel, is the dominating cause of the above mentioned phenomena. All these modification affect the fuel corrosion behaviour in a repository in the situation of failure of all retention barriers.; JRC.E.5-Nuclear chemistry

Experimental Assessment of Accident Scenarios for the High Temperature Reactor Fuel System

SEEGER OLIVER; AVINCOLA Valentina; LAURIE Mathias; BOTTOMLEY Paul; RONDINELLA Vincenzo; ALLELEIN H.j.
Fonte: INFORUM VERLAGS-VERWALTUNGSGESELLSCHAFT MBH Publicador: INFORUM VERLAGS-VERWALTUNGSGESELLSCHAFT MBH
Tipo: Articles in Journals Formato: Printed
ENG
Relevância na Pesquisa
16.16%
The High Temperature Reactor (HTR) is characterized by an advanced design with passive safety features. Fuel elements are constituted by a graphite matrix containing sub-mm-sized fuel particles with TRi-ISOtropic (TRISO) coating, designed to provide high fission product retention. During a loss of coolant accident scenario in a HTR the maximum temperature is foreseen to be in the range of 1600- 1650 °C, remaining well below the melting point of the fuel. Two key aspects associated with the safety of HTR fuel are assessed in this paper: fission product retention at temperatures up to 1800°C is analyzed with the Cold Finger Apparatus (KüFA) while the behaviour of HTR-relevant fuel materials in an oxidizing environment is studied with the Corrosion Apparatus KORA. The KüFA is used to observe the combined effects of Depressurization and LOss of Forced Circulation (DLOFC) accident scenarios on HTR fuel. Originally designed at the ForschungsZentrum Jülich (FZJ), an adapted KüFA operates on irradiated fuel in hot cell at JRC-ITU. A fuel pebble is heated in helium atmosphere for several hundred hours, mimicking accident temperatures up to 1800°C and realistic temperature transients. Nongaseous volatile fission products released from the fuel condense on a water cooled stainless steel plate dubbed "Cold Finger". Exchanging plates frequently during the experiment and analyzing plate deposits by means of High Purity Germanium (HPGe) gamma spectroscopy allows a reconstruction of the fission product release as a function of time and temperature. To achieve a good quantification of the release...

Structure, wettability, and barrier properties of self-assembled monolayers on metallic surfaces

Srivastava, Piyush
Fonte: Universidade Rice Publicador: Universidade Rice
ENG
Relevância na Pesquisa
26.16%
Self-assembled monolayers (SAMs) offer a convenient approach for fabricating molecularly tailored interfaces with well-defined compositions, structures, and thicknesses. SAMs have been suggested for use as corrosion barriers, antifouling coatings, and as components of molecular electronics and lithography. Still, researchers lack the molecular description of the interfacial properties, structural features, and barrier properties of SAMs that would be useful for optimizing and tailoring the behavior of SAMs. This dissertation makes connections between the molecular level structural features of SAMs and macroscopic properties such as wettability and barrier properties using molecular dynamics (MD) simulations and experimental techniques. MD simulations were performed to explain the unexpected experimental observation that the wetting properties of some liquids on SAMs prepared using alkanethiols (CnSH) depend on whether the chain length (n) is odd or even. The difference in near-surface structure of the liquid (and not that of reorganization events by the monolayer) appears responsible for the high sensitivity of hexadecane and the general insensitivity of water to the structural differences expressed by odd- and even-chained monolayer surfaces. MD simulations were also performed to investigate the influences of molecular structure on the ability of n-alkanethiolate SAMs on gold and copper to act as barrier films against through-film oxygen transport as relevant to the uses of these films in corrosion inhibition. The barrier resistances offered by these films towards oxygen transport...

An approach to design new coatings for biomedical applications

El-Hadad, Amir Abdel-Samie
Fonte: Universidade Carlos III de Madrid Publicador: Universidade Carlos III de Madrid
Tipo: Tese de Doutorado Formato: application/pdf
ENG
Relevância na Pesquisa
16.52%
Ti6Al4V alloy is widely used as implants for orthopedic and dental applications because of its superior mechanical properties, excellent corrosion resistance and good biocompatibility. However, it takes long period of several months for Ti6Al4V implants to integrate with the bone tissue due to their bio-inert feature in nature. An innovating and incipient method to solve the above mentioned drawbacks consist of the development of new coatings which could improve both the biological and corrosion protection performance of the Ti6Al4V alloy. Thus, a variety of strategies have been implemented to modify the surface of Ti6Al4V-based implants and enhance bone growth and their initial stability. A common approach is the deposition of bioactive hybrid coatings including inorganic and organic units on the surface of the Ti6Al4V alloy via sol-gel method. The sol–gel route is of great interest as it offers the possibility of tailoring the material properties by variation of the relative composition of the precursors used. The aim of this thesis is focused on the development of new coatings, starting with inorganic hydroxyapatite (HAp) deposited onto Ti6Al4V substrate prepared through solgel route. The effect of thermal treatment temperature on both in-vitro bioactivity and corrosion performance has been studied in simulated body fluid solution (SBF). A complete physical-chemical characterization was done in all the thermally treated coatings obtained. In-vitro tests in SBF were carried out in order to investigate the biological performance of the films. Due to the high temperature required for synthesizing HAp in crystalline form...

Existing and Potential Technologies for Carbon Emissions Reductions in the Indian Cement Industry : A Set of Technical Papers Produced for the Project 'Low Carbon Technology Road Map for the Indian Cement Industry'

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Tipo: Economic & Sector Work :: Commodities Study; Economic & Sector Work
ENGLISH; EN_US
Relevância na Pesquisa
26.11%
This set of technical papers was commissioned by the Cement Sustainability Initiative (CSI) members in India. CSI is a member-led program of the World Business Council for Sustainable Development (WBCSD). The report represents the independent work of the CII - Godrej Green Business Centre (CII, Godrej GBC), a center of excellence of Confederation of Indian Industry (CII) and the National Council for Cement and Building Materials (NCB). The author of each paper is shown after its title. It aims to identify, describe and evaluate technologies, which may contribute to increased energy efficiencies and reduced greenhouse gas emissions from cement production in India today and in the longer-term. The results have been reviewed by CII, NCB, CSI member companies and stakeholders like the International Energy Agency (IEA). All papers follow the same format, outlining the current status of the technology, the impact on energy consumption, anticipated benefits from implementation, the CO? reduction potential, main parameters influencing implementation...

Niobium-based sputtered thin films for Corrosion Protection of proton-irradiated liquid water targets for [18F] production

Skliarova, H.; Azzolini, O.; Dousset, O.; Johnson, R. R.; Palmieri, V.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 29/08/2013
Relevância na Pesquisa
26.49%
Chemically inert Coatings on Havar entrance foils of the targets for [18F] production via proton irradiation of enriched water at pressurized conditions are needed to decrease the amount of ionic contaminants released from Havar. In order to find the most effective protective coatings, the Nb-based coating microstructure and barrier properties have been correlated with deposition parameters as: substrate temperature, applied bias, deposition rate and sputtering gas pressure. Aluminated quartz used as a substrate allowed us to verify the protection efficiency of the desirable coatings as diffusion barriers. Two modeling corrosion tests based on the extreme susceptibility of aluminum to liquid gallium and acid corrosion were applied. Pure Niobium coatings have been found less effective barriers than Niobium-titanium coatings. But Niobium oxide films, according to the corrosion tests performed, showed superior barrier properties. Therefore Multi-layered Niobium-Niobium oxide films have been suggested, since they combine the high thermal conductivity of Niobium with the good barrier properties of Niobium oxide.; Comment: 24 pages, 11 pictures, 6 tables

Pantallas acústicas submarinas de material compuesto multilaminar con matriz metálica

Gallego, V.; Laguna, M.; Vázquez Vaamonde, Alfonso José
Fonte: Sociedad Española de Acústica Publicador: Sociedad Española de Acústica
Tipo: Comunicación de congreso Formato: 240532 bytes; application/pdf
SPA
Relevância na Pesquisa
26.32%
7 pp.-- PACS nr.: 43.30.Ky.-- Comunicación presentada en los siguientes congresos: XXX Jornadas Nacionales de Acústica – TecniAcústica 1999. Encuentro Ibérico de Acústica (Ávila, 20-22 Octubre 1999).; Publicado en número especial de la Revista de Acústica: Vol 30(1999).; [EN] Here we examine the posibility of implementing some robust, light and low cost underwater acoustical barriers made with a new multilaminar composite material. A basic condition for this application is the very high resistance to corrosion of the material into the marine environment. Using wideband signals, similar to underwater explosions, the FFT spectrum of atenuation for a simple barrier model has been investigated in a water tank.; [ES] La idea base de este trabajo, con la que se ha trabajado en el tanque de agua del Laboratorio de Acústica Submarina de la ETSIAN, es la interposición entre la superficie del mar y el hidrófono receptor de una pantalla o barrera horizontal fijada al fondo por encima del trasductor de modo que atenúe lo más posible el ruido de la superficie que llega en direcciones próximas a la vertical. Para ello se han empleado unas placas o láminas fabricadas por el CENIM con un nuevo material cuyas características principales se reseñan en el texto.; Se agradece a la CICYT la financiación del proyecto: "Desarrollo de un material compuesto multilaminar de matriz metálica".; Peer reviewed

Voltammetric Adsorption Studies of Commercial Corrosion Inhibitors. A First Correlating Approach to the Corrosion Inhibition Efficiency

D’Elia,L.F.; Torres,F.; Báez,V.
Fonte: Sociedade Portuguesa de Electroquímica Publicador: Sociedade Portuguesa de Electroquímica
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2009 EN
Relevância na Pesquisa
36.48%
Adsorption of film forming corrosion inhibitors on metallic surfaces led to a decrease in corrosion rates, since the adsorbed organic molecules behave as chemical and physical barriers for cathodic and anodic reactions. A novel and simple methodology to characterize commercial corrosion inhibitors is proposed. Fundamental studies of film forming corrosion inhibitors adsorption on platinum and its correlation with corrosion inhibition efficiencies of steel provide useful information for quality control of film forming inhibitors.