Browsing Engineering by Author "Ortega Vega, Maria Rita"
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Alternative methods to attach components in printed circuit boards to improve their recyclability
Marques, André Canal; Ortega Vega, Maria Rita; Cabrera Marrero, José María; Malfatti, Célia de Fraga (2014) [Journal article]Printed circuit boards (PCB), which form the basis of the electronics industry, generate wastes that are difficult to dispose of and recycle due to the diversity of their materials and components and their difficult ... -
Anticorrosive performance of commercial nanoceramic coatings on AISI 1010 steel
Baldin, Estela Knopp Kerstner; Kunst, Sandra Raquel; Beltrami, Lílian Vanessa Rossa; Ortega Vega, Maria Rita; Scienza, Lisete Cristine; Malfatti, Célia de Fraga (2014) [Journal article]The aim of this work was to study the corrosion behavior of three commercial nanoceramic coatings in comparison to zinc phosphate coatings applied on mild steel (SAE 1010). The coatings were evaluated by scanning electron ... -
Corrosion resistance of hybrid films applied on tin plate : precursor solution acidified with nitric acid (pH=3)
Kunst, Sandra Raquel; Ludwig, Gustavo Alberto; Ortega Vega, Maria Rita; Oliveira, Cláudia Trindade; Malfatti, Célia de Fraga (2014) [Journal article]Siloxane - poly (methylmethacrylate)-based materials are systems formed by a silicon network, to which chains of poly (methylmethacrylate) are linked by covalent bonds or by physical interactions. Their stability and ... -
Effect of concentrations of plasticizers on the sol-gel properties developed from alkoxides precursors
Kunst, Sandra Raquel; Longhi, Marielen; Beltrami, Lílian Vanessa Rossa; Zini, Lucas Pandolphi; Boniatti, Rosiana; Cardoso, Henrique Ribeiro Piaggio; Ortega Vega, Maria Rita; Malfatti, Célia de Fraga (2017) [Journal article]Coatings developed through sol-gel method is presented as an interesting replacement to chromium coating. Sol-gel method present advantages as high purity and excellent distribution of the components. The objective of this ... -
Effect of curing temperature and architectural (monolayer and bilayer) of hybrid films modified with polyethylene glycol for the corrosion protection on tinplate
Kunst, Sandra Raquel; Beltrami, Lílian Vanessa Rossa; Brandolt, Cristiane de Souza; Cardoso, Henrique Ribeiro Piaggio; Ortega Vega, Maria Rita; Baldin, Estela Knopp Kerstner; Menezes, Tiago Lemos; Malfatti, Célia de Fraga (2014) [Journal article]Hybrid films obtained by a sol-gel process are based on two important reactions: hydrolysis and condensation. The condensation reaction is influenced by the curing temperature, since it induces the development of the ... -
Niobium and niobium-iron coatings on API 5LX 70 steel applied with HVOF
Brandolt, Cristiane de Souza; Souza Júnior, Jair Garcia de; Kunst, Sandra Raquel; Ortega Vega, Maria Rita; Schroeder, Roberto Moreira; Malfatti, Célia de Fraga (2014) [Journal article]The present study aimed to create and characterize niobium and niobium-iron60% coatings applied to steel API 5L X70 using the hypersonic thermal spray process (HVOF). The morphologies of the coatings were analyzed using ... -
Protic ionic liquids used as metal-forming green lubricants for aluminum : effect of anion chain length
Ortega Vega, Maria Rita; Parise, Karine; Ramos, Leandro Brunholi; Boff, Uilian; Silva, Silvana Mattedi e; Schaeffer, Lirio; Malfatti, Célia de Fraga (2017) [Journal article]Among the applications for protic ionic liquids (PILs), lubrication is one of the newest and the most promising. In this work, ammonium-based protic ionic liquids were tested as lubricant fluids for aluminum-steel contacts. ... -
The influence of adding corrosion inhibitor and pH on the electrochemical properties of hybrid films applied to galvanised steel
Kunst, Sandra Raquel; Ludwig, Gustavo Alberto; Ortega Vega, Maria Rita; Malfatti, Célia de Fraga (2013) [Journal article]This study was aimed at coating galvanised steel with a hybrid film obtained from a sol consisting of silane precursors 3 - (trimetoxisililpropil) methacrylate (TMSPMA) and tetraethoxysilane (TEOS). The pH of the ... -
Tribocorrosion and electrochemical behavior of DIN 1.4110 martensitic stainless steels after cryogenic heat treatment
Ramos, Leandro Brunholi; Simoni, Leonardo; Mielczarski, Rafael Gomes; Ortega Vega, Maria Rita; Schroeder, Roberto Moreira; Malfatti, Célia de Fraga (2017) [Journal article]DIN 1.4110 martensitic stainless steel is largely used in the cutlery industry due to its high corrosion resistance associated with high mechanical resistance. However, when this material works under corrosion and wear ...