Corrosion And Oxidation
Mostrando 1-12 de 41 artigos, teses e dissertações.
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1. Synthesis of New Phenolic-Schiff Base and Its Application as Antioxidant in Soybean Biodiesel and Corrosion Inhibitor in AISI 1020 Carbon Steel
New Schiff base compound N, N’-bis-(4-hexadecanate)-salicylethylenediamine (named IM) was synthesized, and characterized via infrared and nuclear magnetic ressonance spectroscopies. IM was tested as corrosion inhibitor and antioxidant in soybean biodiesel. Corrosion studies were developed with AISI 1020 carbon steel in a three-step accelerated corrosion as
J. Braz. Chem. Soc.. Publicado em: 2020-03
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2. The influence of Cu content on high temperature corrosion behavior of heat - resistant molten salt steel
ABSTRACT This work studies the high temperature corrosion behavior of new heat-resistant steel with salt coating method of 75%Na2SO4+25%NaCl coating on the steel surface at 700ºC. The chemical composition of corrosion products and surface morphology of the corrosion layer were analyzed using X-ray diffractometer (XRD), scanning electron microscopy (SEM), en
Matéria (Rio J.). Publicado em: 16/09/2019
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3. The Effects of pH Values on Functional Mechanisms of Nitrite Anions for Q235 Carbon Steels in 0.01 mol L-1 NaNO2-HCl Solutions
For Q235 carbon steels in 0.01 mol L-1 NaNO2-HCl solutions with different pH values, the effects of pH values on the functional mechanisms of nitrite anions (NO2-) were studied. In the pH 1 and pH 2 solutions, the Q235 steels showed the electrochemical behavior of activation, and uniform corrosion (UC) was the main corrosion type on the Q235 surface. The pre
J. Braz. Chem. Soc.. Publicado em: 12/08/2019
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4. 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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5. Microstructural, thermochemistry and mechanical evaluation of self-reducing pellets using electric arc furnace (EAF) dust containing zinc for Waelz process
ABSTRACT The increment of recycling of steel using electric arc furnace and the tendency to coat of steel products with zinc, in order to prevent corrosion, has increased the proportion of galvanized scrap used worldwide in the recent years. Approximately 10 to 20 Kg/t of cast steel is generated in casting arcs. These collected dusts electric arc furnace (EA
Matéria (Rio J.). Publicado em: 19/07/2018
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6. Wear resistance of AISI 304 stainless steel submitted to low temperature plasma carburizing
Abstract Despite the AISI 304 stainless steel has high corrosion/oxidation resistance, its tribological properties are poor, being one of the barriers for use in severe wear applications. Thus, there is a wide field for studying technologies that aim to increase the surface hardness and wear resistance of this material. In this work, hardness and wear resist
REM, Int. Eng. J.. Publicado em: 2017-09
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7. Growth and Electrochemical Stability of Compact Tantalum Oxides Obtained in Different Electrolytes for Biomedical Applications
Tantalum has been cited to have many biomaterial applications, exhibiting biocompatibility and outstanding corrosion resistance. Tantalum may be covered with tantalum oxide using the electrochemical process of anodic oxidation. The oxide surface is known to be bioactive and more corrosion resistant. In this research, compact tantalum oxide films were obtaine
Mat. Res.. Publicado em: 23/10/2015
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8. The Inhibition of Sodium Oleate for Pitting Corrosion of Aluminum Alloy 2024 in 0.1 mol L-1 NaCl Solution
The inhibition mechanism of sodium oleate (C17H33COONa) for pitting corrosion of aluminum alloy (AA) 2024 in 0.1 mol L-1 NaCl solution was investigated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), scanning electron microscopy with energy dispersive spectrometer (SEM-EDS) and X-ray photo
J. Braz. Chem. Soc.. Publicado em: 2015-08
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9. Effect of the Shot Peening Process on the Corrosion and Oxidation Resistance of AISI430 Stainless Steel
Ferritic stainless steels are used in specific applications where corrosion resistance, oxidation resistance and a high mechanical resistance are required. Shot peening is a process applied to add residual compression stresses in metallic surfaces with the intent of improving the material when exposed to corrosion due to stress and fatigue. Some studies abou
Mat. Res.. Publicado em: 2015-06
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10. Electrochemical Stability and Bioactivity Evaluation of Ti6Al4V Surface Coated with Thin Oxide by EIS for Biomedical Applications
To improve the implants biocompatibility many surface modifications were proposed. Investigations about the surface modification on Ti alloys by anodic oxidation are reported. This research presents a study on the stability of thin titanium dioxide grown by potentiodynamic method on Ti6Al4V surfaces up to 5.0 V. Its bioactive surface in phosphate buffer solu
Mat. Res.. Publicado em: 2015-06
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11. Improved biological performance of magnesium by micro-arc oxidation
Magnesium and its alloys have recently been used in the development of lightweight, biodegradable implant materials. However, the corrosion properties of magnesium limit its clinical application. The purpose of this study was to comprehensively evaluate the degradation behavior and biomechanical properties of magnesium materials treated with micro-arc oxidat
Braz J Med Biol Res. Publicado em: 19/12/2014
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12. 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