Gold and Gold-Nickel Pulse Electrodeposition, M.Sc. Thesis Sharif University of Technology ; Dolati, Abolghasem (Supervisor) ; Ghorbani, Mohammad (Supervisor)
Abstract
In recent years use of expensive metals plating has taken much interest from decorative state to industry trends. In this research the effect of pulse plating on the structure and properties of pure gold and gold-nickel has been studied.In case of pure gold pulse plating from cyanide bath, it was shown that current efficiency increased by increasing duty cycle up to 30% and decreased, afterwards. By increasing frequency from 1 to 150 Hz current efficiency decreased. By reducing the level of frequency, average grain size was increased, owing to the occurrence of recrystallization. An increase in the value of current density was also shown to be responsible for a reduction in current...
Cataloging briefGold and Gold-Nickel Pulse Electrodeposition, M.Sc. Thesis Sharif University of Technology ; Dolati, Abolghasem (Supervisor) ; Ghorbani, Mohammad (Supervisor)
Abstract
In recent years use of expensive metals plating has taken much interest from decorative state to industry trends. In this research the effect of pulse plating on the structure and properties of pure gold and gold-nickel has been studied.In case of pure gold pulse plating from cyanide bath, it was shown that current efficiency increased by increasing duty cycle up to 30% and decreased, afterwards. By increasing frequency from 1 to 150 Hz current efficiency decreased. By reducing the level of frequency, average grain size was increased, owing to the occurrence of recrystallization. An increase in the value of current density was also shown to be responsible for a reduction in current...
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