Modelagem e otimização da eletrodeposição do cobre no substrato de latão em banho eletrolítico com o uso do glicerol
Electroplating is a very important industrial process, its products are present in everyday life, whether in household utensils, computer items, semi-jewelry, clothing buttons, or even items belonging to the metallurgical and civil construction industries. The process is based on metallic coating, o...
Na minha lista:
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | bachelorThesis |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
|
| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/53262 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: | Electroplating is a very important industrial process, its products are present in everyday life, whether in household utensils, computer items, semi-jewelry, clothing buttons, or even items belonging to the metallurgical and civil construction industries. The process is based on metallic coating, or electrodeposition, on metallic or non-metallic bases, with the aim of bringing more resistance to corrosion and/or guaranteeing a stylish and eye-catching finish. The copper electrodeposition process is commonly performed using two main types of baths: those based on acid sulfate and alkaline cyanides. The limiting factor of cyanide copper baths is their high potential for toxicity, requiring great concerns and impositions regarding environmental and health safety aspects when handling them. In this way, many alternatives are sought to exempt this component, and that in a sustainable way, can deliver efficiency in the process and energy consumption. Among several options, there is the use of organic additives such as, for example, glycerol, which will be investigated in this work. In this work, a 4^3 full factorial experimental design with three factors and four replications at the central point was performed to evaluate the effect of copper deposition on brass at different concentrations of glycerol, time and amperage. The response variable was cathode current efficiency. The tests were carried out in a miniaturized unit of an industrial electrodeposition system, the Hull cell. The results showed that the terms that represent amperage linearly and quadratically, glycerol and the product between time and glycerol, are within a 95% confidence interval, attesting to the significance of these factors. The test chosen as the optimal point showed a cathode current efficiency of 57.3% and energy consumption of 234.40 KWh/Kg, resulting in a greater copper deposition in a lower energy consumption. The generated deposits showed a reddish orange color, characteristic of metallic copper, layer uniformity, leveling and brightness. These effects were explained by the formation of Cu(glyc) and [Cu(glyc)2]2− complexes in the alkaline bath with NaOH. |
|---|