Análise do processo de sputtering como alternativa ao processo galvânico
Analisys of sputtering process as alternative to galvanic process
Mônia Aline Hunger Geiger, Luã Tainachi Mueller, Fernando Dal Pont Morisso, Sandra Raquel Kunst, Carlos Leonardo Pandolfo Carone, Cláudia Trindade Oliveira
Resumo
O processo galvânico tem alto grau poluidor devido à quantidade de efluentes geradas e à toxicidade dos produtos químicos utilizados no processo. Sabe-se que o cromo hexavalente é conhecido como um agente cancerígeno e os resíduos associados são perigosos e difíceis de serem tratados. Frente a isso, o desenvolvimento de novas tecnologias tem visado à obtenção de processos resistentes à corrosão, ambientalmente corretos e economicamente viáveis. A tecnologia alternativa que pode ir ao encontro desta necessidade é o PVD - physical vapor deposition, com o processo de sputtering. Neste contexto, este estudo tem como objetivo avaliar e comparar o desempenho de revestimentos de alumínio aplicados por sputtering com verniz em relação ao desempenho do revestimento de cromo eletrodepositado. Para tanto, os revestimentos foram aplicados em zamac e foram caracterizados morfologicamente e eletroquimicamente. Os resultados mostraram que os acabamentos de alumínio depositados por sputtering apresentam características equivalentes tanto no desempenho eletroquímico bem como nos ensaios morfológicos quando comparados ao revestimento cromado no processo convencional (galvanoplastia), podendo ser uma alternativa de substituição com âmbito sustentável.
Palavras-chave
Abstract
The galvanic process has a high degree of pollution due to the amount of effluents generated and the toxicity of the chemicals used in the process. You know if hexavalent chromium is known as a carcinogen and the associated residues are dangerous and difficult to use. In view of this, the development of new technologies has been used to use corrosion resistant, environmentally friendly and economically viable processes. An alternative technology that can meet this need is PVD - physical vapor deposition, with a spray process. In this context, this study aims to evaluate and compare the performance of aluminum coatings applied by sputtering with varnish in relation to the performance of the electrodeposited chrome coating. For that, the coatings were applied in zamak and were characterized morphologically and electrochemically. The results shown when the aluminum finishes deposited by spraying show equivalent characteristics both in electrochemical performance and in morphological tests when compared to the chrome plating in the conventional process (electroplating), being an alternative of substitution with sustainable use.
Keywords
Referências
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Submetido em:
30/07/2020
Aceito em:
18/05/2021
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