Corrosion Inhibitors
Mostrando 13-24 de 52 artigos, teses e dissertações.
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13. Roasted Coffee Extracts as Corrosion Inhibitors for Mild Steel in HCL Solution
The behavior of roasted coffee extract and its isolated high molecular weight fraction have been investigated as carbon steel corrosion inhibitors in HCl solution by weight loss measurements, potentiodynamic polarization curves, electrochemical impedance and scanning electron microscopy analysis. All results showed that the high molecular weight fraction, ri
Mat. Res.. Publicado em: 26/09/2016
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14. Strategies for corrosion inhibition of slurry pipelines prior to commissioning
Abstract A practice used to prevent corrosion in buried slurry pipelines is the hibernation of pipelines with an aqueous solution containing corrosion inhibitors before beginning the mining operation. The aim of this work is to evaluate the corrosion resistance of API 5L X70 steel used in the slurry pipelines in hibernation solution containing sodium sulphit
Rem: Rev. Esc. Minas. Publicado em: 2016-06
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15. USING A DOE AND EIS TO EVALUATE THE SYNERGISTIC EFFECTS OF LOW TOXICITY INHIBITORS FOR MILD STEEL
Abstract Inhibitors are widely used to prevent corrosion in cooling-water systems, and their protective performance can be enhanced by combination. The aim of this paper is to identify possible synergistic effects between four low toxicity substances used as corrosion inhibitors for mild steel in industrial cooling-water systems. Electrochemical measurements
Braz. J. Chem. Eng.. Publicado em: 2015-03
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16. Experimental and Theoretical Studies of Volatile Corrosion Inhibitors Adsorption on Zinc Electrode
This study evaluates the interaction of volatile corrosion inhibitors (VCIs) of the amino group with the zinc or zinc oxide surface by means of computational calculations using density functional theory (DFT) and comparing with experimental methods such as electrochemical impedance spectroscopy (EIS) and wet chamber tests. The application of these methods al
J. Braz. Chem. Soc.. Publicado em: 2015-03
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17. Aqueous extracts of mango and orange peel as green inhibitors for carbon steel in hydrochloric acid solution
In this paper, aqueous extracts of mango and orange peels were shown to be good corrosion inhibitors for carbon steel in a 1 mol L- 1 HCl solution. The inhibition efficiency increased as the extract concentration increased over a concentration range of 200-600 mg L- 1, varying from 79 to 96% (mango) and 84 to 91% (orange) using Tafel plots and from 69 to 94%
Mat. Res.. Publicado em: 2014-12
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18. Flow injection analysis with amperometric detection for morpholine determination in corrosion inhibitors
Neste estudo, um método eletroquímico é proposto utilizando análise por injeção em fluxo e detecção amperométrica com eletrodos impressos de carbono para determinação de morfolina com intuito de monitorar a qualidade de inibidores de corrosão à base de morfolina e a concentração residual de inibidores que controlam a corrosão interna em dutos
J. Braz. Chem. Soc.. Publicado em: 2014-08
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19. Modified cassava starches as potential corrosion inhibitors for sustainable development
Activated (AS) and carboxymethylated (CMS0.24) cassava starch derivatives were studied as corrosion inhibitors for carbon steel XC35 in a 200 mgL-1 NaCl solution. They were characterized by back titration and Fourier Transform Infrared Spectroscopy (FTIR). Electrochemical techniques were used to evaluate the inhibitive properties of starches at room temperat
Mat. Res.. Publicado em: 02/08/2013
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20. Avaliação do copolímero de acrilonitrila e 2-vinil-2-oxazolina na eficiência de inibição de corrosão química em meio salino / Evaluation of the efficiency of acrylonitrile and 2-vinyl-2-oxazoline copolymer as chemical corrosion inhibitors in saline medium
Processos corrosivos geram perdas incalculáveis para a sociedade. Existe, portanto, uma incessante busca por métodos cada vez mais econômicos, eficientes e que não gerem impacto ao meio-ambiente. Polímeros heterocíclicos são macromoléculas de elevada performance que vêm sendo estudados como inibidores de corrosão por atenderem as premissas citadas
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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21. Alkanediyl-α, ω-bis (dimethyl cetylammonium bromide) gemini surfactants as novel corrosion inhibitors for mild steel in formic acid
Gemini surfactants, butanediyl 1,4-bis(dimethyl cetylammonium bromide), pentanediyl 1,5 - bis (dimethyl cetylammonium bromide) and hexanediyl 1,6 - bis (dimethyl cetylammonium bromide) from Alkanediyl-α, ω-bis (dimethyl cetylammonium bromide) series were synthesized in laboratory and were characterized by using Nuclear Magnetic Resonance (NMR) spectroscopy
Mat. Res.. Publicado em: 13/09/2012
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22. Estudo da emissão por fluorescência de ultravioleta na quantificação de um inibidor de corrosão do tipo sal de amônio quaternário em água
Quaternary ammonium salts are the corrosion inhibitors most frequently used by the oil industry. In this study, the ultraviolet fluorescence technique was evaluated for the analysis of a quaternary ammonium salt in water as a corrosion inhibitor. The comparison with standard salt showed that an alkyl aryl quaternary ammonium salt is the main fluorophore, wit
Química Nova. Publicado em: 2012
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23. Obtenção e caracterização de revestimentos híbridos à base de precursores alcoóxidos sobre o aço galvanizado
Galvanized steel presents a protective layer of Zn and Zn-Fe, obtained by hot dipping, which promotes the steel protection. However, the presence of this layer decreases the adhesion of paint systems and reduces the corrosion resistance. A very efficient method used to protect against the substrate corrosion is chromate layers, which provide excellent antico
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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24. SÍNTESE DE (TIO)SEMICARBAZONAS E AVALIAÇÃO EXPERIMENTAL E TEÓRICA DA ATIVIDADE ANTI-CORROSÃO / SYNTHESIS OF (thiosemicarbazones AND EVALUATION AND EXPERIMENTAL THEORY OF ACTIVITY ANTI-CORROSION
Nesta Dissertação foram sintetizados 30 compostos, sendo 15 pertencentes à classe das semicarbazonas e os outros 15 pertencentes à classe das tiossemicarbazonas, com o objetivo de avaliar a eficiência dos mesmos como inibidores de corrosão. Os compostos foram previamente analisados por Modelagem Molecular, obtendo-se informações a respeito de proprie
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/10/2010