کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1656785 | 1517593 | 2016 | 6 صفحه PDF | دانلود رایگان |
• A double counter electrode method was developed for alloy coatings.
• Coating composition can be controlled by changing counter electrodes of different metals.
• Coating efficiency is affected by the distance between the counter and working electrodes.
A double counter electrode electrodeposition system was developed to enable co-electrodeposition of Al and Zn with a desired composition. This system switches the active counter electrodes of different metals as a metal ion source to alter the composition of an EMIC–AlCl3-based ionic liquid bath. Using an integrated counter electrode composed of Al and Zn plates and a thin electrolyte cell, Al and Zn were co-electrodeposited on a Cu plate substrate by the galvanostatic pulse method. The effects of electrodeposition current density, distance between the working and counter electrodes, and electric charge ratio of anodic dissolution on the Al and Zn counter electrodes on the composition of coatings were examined. Experimental results confirmed that current density and charge ratio affected the composition of the coatings. On the other hand, the distance between the counter and the working electrode showed a rather complicated effect on the coating composition. This was explained by the transition of the transport mechanism of Zn ions supplied from the Zn counter electrode to the working electrode surface via the ionic liquid bath depending on the distance.
Journal: Surface and Coatings Technology - Volume 286, 25 January 2016, Pages 256–261