Electrochemical Treatment
Mostrando 1-12 de 160 artigos, teses e dissertações.
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1. Additive Manufacturing towards the Fabrication of Greener Electrochemical Sensors for Antioxidants
Additive manufacturing is an emerging tool that has contributed to the sustainable fabrication of devices in several areas based on the concept of “zero waste”. Considering extrusion-based manufacturing (or 3D printing), polylactic acid (PLA) has been highlighted due to its biodegradability, obtention from renewable sources, and compatibility for 3D prin
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. COMPREENDENDO OS MECANISMOS DE CORROSÃO DE LIGAS DE AL-CU-LI: UMA INVESTIGAÇÃO ATRAVÉS DE TÉCNICAS ELETROQUÍMICAS GLOBAIS E LOCAIS
In this study, the corrosion mechanism of an Al-Cu-Li alloy manufactured by two different treatment routes (T3 and T851) was evaluated by immersion and electrochemical tests in solutions containing chloride ions (Cl-). For both alloys, the formation of cavities on the surface was associated with micrometer-sized intermetallics (IM’s), however, in addition
Química Nova. Publicado em: 2022
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3. Comparative Study of Degradation of Reactive Dyes and Decolorization and Detoxification in Aqueous Solution Applying DyP Peroxidases Isolated from Saccharomonospora viridis (SviDyP) and Thermobifida fusca (TfuDyp)
The wastewater that originates from the widespread usage of synthetic dyes in the industry have become a severe environmental problem. Several efforts have been made to develop new types of treatment which are capable of performing the degradation of the dyes from the environment. Within this scope, much attention has been drawn to enzymatic approaches, main
J. Braz. Chem. Soc.. Publicado em: 2021-06
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4. Electroanalytical Method for Determination of Trace Metals in Struvite Using Electrochemically Treated Screen-Printed Gold Electrodes
We present an electroanalytical method using square-wave anodic stripping voltammetry on electrochemically-treated screen-printed gold electrodes to the simultaneous determination of lead(II), copper(II) and mercury(II) in struvite (natural fertilizer produced from urine). Electrochemical treatment via cyclic voltammetry of the working electrodes increased s
J. Braz. Chem. Soc.. Publicado em: 2020-09
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5. Evaluation of a Graphite-Polyurethane Composite Electrode Modified with Copper Nanoparticles as an Amperometric Flow Detector in a Wall-Jet System for the Determination of Cysteine
A graphite-polyurethane composite electrode (GPUE) was modified by electrodeposition of copper nanoparticles (CuNP) followed by electrochemical treatment in NaOH (GPUE-CuNP), in order to prepare an amperometric sensor for the determination of cysteine (Cys). Cyclic votammograms of Cys solutions at GPUE-CuNP allowed the description of a sequence of electroche
J. Braz. Chem. Soc.. Publicado em: 2020-02
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6. Effect of Etching Temperature on Surface Properties of Ti6Al4V Alloy for Use in Biomedical Applications
The objective of this study is to evaluate the surface physicochemical properties of Ti6Al4V alloy after etching with a piranha’s solution at temperatures of 25 °C, 40 °C, and 60 °C for 30 min. Scanning electron microscopy with energy-dispersive X-ray spectroscopy, optical profilometry, X-ray diffraction, and wettability analyses were used to characteri
Mat. Res.. Publicado em: 10/01/2020
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7. Corrosion Resistance of Cu-Alloyed Precipitation Hardenable Duplex Stainless Steel ASTM A890 Grade 1B
Duplex stainless steels (DSS) are corrosion resistant alloys largely used in chemical and petrochemical industries. Some commercial DSS contain 0.5-1.0% copper addition to improve the corrosion resistance by reducing the corrosion rate in non-oxidizing environments. Higher copper addition (≥ 2%) can also hard by precipitation, especially when fine copper p
Mat. Res.. Publicado em: 07/11/2019
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8. Produção e caracterização de revestimentos de ligas metálicas Cu-Sn em banho eletrolítico contendo glicina: ensaios preliminares
RESUMO Os problemas relacionados à corrosão são frequentes, podendo ocorrer nas mais variadas áreas, tais como, nas indústrias química, petroquímica, naval, de construção civil e automobilística, dentre outros setores produtivos. Portanto, métodos para prevenir a corrosão devem ser empregados para evitar a perda de materiais e o uso de revestimen
Matéria (Rio J.). Publicado em: 16/09/2019
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9. Avaliação da resistência à corrosão do filme de silanoviniltrimetoxisilano modificado com íons Ce (III) e Ce (IV) como pré-tratamento do aço carbono
RESUMO Silanos são compostos organo funcionais utilizados como agentes de acoplamentos entre interfaces orgânicoinorgânicas, com boas propriedades de adesão. Por esta razão, o uso de silanos como pré-tratamento para aços, vem ganhando espaço já que também são geradores de resíduos de menor toxidade ao meio ambiente e à saúde humana. Para melhor
Matéria (Rio J.). Publicado em: 16/09/2019
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10. Effect of Warm Rolling on the Corrosion and Mechanical Properties of UNS S32205 Duplex Stainless Steel
Duplex stainless steel (DSS) has been considered as an excellent alternative for applications where high corrosion resistance and high mechanical strength are required. Therefore, microstructure and properties of DSS remain topics of much interest. For this purpose, the effect of warm-rolling was studied in a duplex stainless steel. The focus of this work wa
Mat. Res.. Publicado em: 02/09/2019
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11. Effect of Electric Pulse Treatment on the Corrosion Resistance of HAl52-2 Aluminum Brass
In this work, the effects of electric pulse treatment (EPT) on the corrosion resistance of HAl52-2 aluminum brass has been investigated using electrochemical workstation, scanning electron microscope and X-ray diffraction. The results have shown that after EPT, the corrosion potential increased and the corrosion current density decreased. At the same time, t
Mat. Res.. Publicado em: 19/08/2019
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12. Influence of the Solution-Treatment Temperature and Short Aging Times on The Electrochemical Corrosion Behaviour of Uns S32520 Super Duplex Stainless Steel
Sigma phase leads to deterioration of corrosion resistance of super duplex stainless steels (SDSS) and its volume fraction increases as the time which the materials is exposed in determined temperature increases. In the present study, the effect of the short aging time on the formation of the sigma phase and on the corrosion behavior of UNS S32520 SDSS at 3.
Mat. Res.. Publicado em: 15/08/2019