Phosphating
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Rates and methods of phosphorus application in cabbage crop
RESUMO A eficiência da adubação fosfatada pode ser reduzida pela incorporação do fertilizante ao solo com enxada rotativa, método que é comumente adotado no cultivo de hortaliças. Objetivou-se avaliar a produtividade de repolho e a eficiência de adubação fosfatada, em função de doses e modos de aplicação de P ao solo. Foram conduzidos quatro e
Pesqui. Agropecu. Trop.. Publicado em: 15/08/2019
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2. Niobium pentoxide coating replacing zinc phosphate coating
A new coating made of niobium pentoxide, obtained through the sol-gel process, was developed for the carbon steel (SAE 1010). The corrosion protection provided by this coating was evaluated through electrochemical tests such as: open circuit potential, electrochemical impedance spectroscopy and anodic potentiodynamic polarization in NaCl 0,5 mol L-1 solution
Matéria (Rio J.). Publicado em: 2014-06
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3. Avaliação de alternativas ao uso de níquel e cromatos no processo de fosfatização tricatiônico aplicado ao aço carbono / Evaluation of alternatives to nickel and chromate in the tricationic phosphating process of carbon steel
Camadas de fosfato tricatiônico são largamente utilizadas na indústria automotiva como proteção contra corrosão e adesão de revestimentos orgânicos ao substrato de aço. A combinação do fosfato e revestimento proporciona à superfície metálica, alta durabilidade à corrosão. Porém a camada cristalina obtida com este tipo de fosfato apresenta po
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2012
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4. DEVELOPMENT AND CHARACTERIZATION OF ZINC/NICKEL AND ZINC/NIOBIUM PHOSPHATE LAYERS / Desenvolvimento e caracterização de camadas de fosfato de zinco/níquel e zinco/nióbio
In the present study, the viability of the substitution of nickel found in some phosphating baths by niobates or by ammonium and niobium oxalate (Ox) with benzotriazole (BTAH), was investigated. The possible substitution of chromium hexavalent as passivating agent by Ox, was also evaluated. The results showed that the niobium compounds might replace the nick
Publicado em: 2008
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5. Influência de parâmetros de processo sobre a morfologia de camadas de fosfato e desempenho de aços fosfatizados e pintados
The influence of process parameters on phosphate coating morphology and corrosion performance of phosphated and painted samples is presented in this work through study of the relationship among process parameters, structure, properties and corrosion performance. The process parameters evaluated were phosphating methodology and concentration of refiner bath.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2005
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6. Effect of molybdate on phosphating of Nd-Fe-B magnets for corrosion protection
Nd-Fe-B magnets are highly susceptible to corrosion and need protection against environment attack. The use of organic coatings is one of the main methods of corrosion protection of these materials. Data related to the effect of conversion coatings, such as phosphating, on corrosion performance of these magnets is still scarce. Studies about the effect of ph
Materials Research. Publicado em: 2005-06
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7. Bacterial Phosphating of Mild (Unalloyed) Steel
Mild (unalloyed) steel electrodes were incubated in phosphate-buffered cultures of aerobic, biofilm-forming Rhodococcus sp. strain C125 and Pseudomonas putida mt2. A resulting surface reaction leading to the formation of a corrosion-inhibiting vivianite layer was accompanied by a characteristic electrochemical potential (E) curve. First, E increased slightly
American Society for Microbiology.