A study of the electrodeposition of iron by pulsed current

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A study of the electrodeposition of iron by pulsed current


Author: So, Chi-kuen
Title: A study of the electrodeposition of iron by pulsed current
Degree: M.Sc.
Year: 1994
Subject: Iron plating
Pulse plating
Hong Kong Polytechnic -- Dissertations
Department: Multi-disciplinary Studies
Pages: iv, 90 leaves : ill. (some col.) ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1182973
URI: http://theses.lib.polyu.edu.hk/handle/200/4028
Abstract: In electroplating with direct current (dc), one can only control the plating bath by a limited number of parameters. Recently, there is an increasing interest in the use of pulse plating by allowing current or voltage to be applied as almost any function of time. The idea of using pulsed current is to utilize the current characteristics rather than the chemistry to control the properties of deposits for certain applications. The current characteristics include the on-time, off-time and the pulsed current density. In the case of pulse reverse (PR) plating, the reverse pulsed current density can also be considered. In this project, iron was electroplated on brass substrate by the application of pulsed current. The microhardness of the deposits were examined by the use of microhardness tester. The current efficiency was also investigated by measuring the difference in weight before and after the plating process. It is found that the microhardness of the iron deposit is improved, the brightness of the surface is improved and the current efficiency is reduced with pulse plating. Satisfactory pulse conditions on electrodeposition of iron based on microhardness have also been established. The condition is on-time at 1ms, off-time at 8ms and average current density at 2.08A/dm2.

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