Analysis of the Initial Stages of Electrocrystallization of Fe, Co and Fe-Co Alloys in Chloride Solutions
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چکیده
A eletrodeposição de Fe, Co e ligas de Fe-Co foi investigada a partir de soluções de cloreto em pH 2.0. As ligas Fe-Co foram depositadas a partir de soluções com razão molar de 1:10, 1:1 e 10:1. O processo de eletrocristalização dos metais foi estudado através de saltos potenciostáticos. O modelo de Scharifker e Hills foi utilizado para analisar os transientes de corrente. Os resultados experimentais obtidos para Co e ligas de Fe-Co, depositadas a partir da solução de 1:10 ajustaramse ao de um mecanismo de nucleação progressiva. No caso de Fe puro e ligas de Fe-Co, depositadas a partir das soluções 1:1 e 10:1, o processo de nucleação ocorreu pelo mecanismo de nucleação instantânea. A densidade do número de núcleos calculados variou de 2.6 a 19.1 x 10 cm para Fe e a taxa de formação de núcleos para Co de 0.10 a 15.8 x 10 cm s.
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تاریخ انتشار 2002