Electroless Nickel
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Wear Behaviour of Electroless heat Treated Ni-P Coatings as Alternative to Electroplated hard Chromium Deposits
In this present study was evaluated the influence of heat treatment on the wear resistance of electroless high phosphorus nickel coating (9-10% P wt.). In addition, both untreated and treated Ni-P deposits were then compared to electroplated hard chromium coatings in terms of wear behaviour. Three different heat treatment conditions were performed at tempera
Mat. Res.. Publicado em: 24/07/2017
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2. Tratamento superficial de peças estruturais sinterizadas a base de ferro
Surface treatment processes, including electroless plating and electroplating, can be applied to structural ferrous P/M parts to obtain better surface properties such as appearance and corrosion resistance. These finishing processes carried out as a secondary operation are essential for the quality and performance of the product. Electroplating and electrole
Publicado em: 2007
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3. Autocatalytic nickel-phosphorus (electroless nickel) coatings to protection corrosion. / Revestimentos de níquel químico para proteção contra corrosão.
O revestimento de níquel químico é largamente utilizado na proteção contra a corrosão de equipamentos e estruturas utilizados na exploração de petróleo em águas profundas. Apesar de ser considerado um dos revestimentos mais adequados para esta finalidade, são muitos os casos em que se verificam falhas prematuras do revestimento em serviço. Isto t
Publicado em: 2006
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4. Preparation and characterization of mixed modified electrodes used in electrocatalytic hydrogenation of organic substrates / Preparação e caracterização de eletrodos modificados mistos e seu uso em hidrogenação eletrocatalítica de substratos orgânicos
This thesis describes the preparation of new modified electrodes (MEs) using the method of noble metal particles deposition like nickel, palladium and platinum in the surface of commum metals particles as cooper and iron. This new electrodes were denominated mixed MEs, and can show different caractheristics and present higher efficiency than others already s
Publicado em: 2006
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5. Influencia dos parametros de deposição na qualidade do revestimento de niquel quimico
The utilization of the nickel plating process without an externally applied electric current, called electroless or autocatalytic nickel, is wide in the metal finishing industry, growing at a 5% a year rate. The electroless nickel process is controlled by plating parameters, which are characterized by the plating temperature, ion metallic concentration and p
Publicado em: 2003
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6. Effect of a Shot Peening Pre Treatment on the Fatigue Behaviour of Hard Chromium on Electroless Nickel Interlayer Coated AISI 4340 Aeronautical Steel
Multiple layer systems of coatings are considered to have larger resistance to crack propagation in comparison to coatings with simple layer. With regard to fatigue, it is possible to improve the resistance of a component with the application of shot peening treatment, whose compressive residual stresses delay or eliminate the initiation and propagation of f
Materials Research. Publicado em: 2002-06