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Electrodeposition of Nano Zinc - Nickel Alloy from Bromide Based Electrolyte

Author Affiliations

  • 1Vivekananda College, Agasteeswaram - 629 701, Kanyakumari, Tamilnadu, INDIA
  • 2Central Electro Chemical Research Institute, Karaikudi - 630 006, Tamilnadu, INDIA

Res.J.chem.sci., Volume 3, Issue (8), Pages 57-62, August,18 (2013)

Abstract

Zinc coatings offer sacrificial protection to iron and steel components at low cost. The basic reason for plating from an alloy bath is to produce some desired change in the electrodeposits unobtainable from the pure metal baths. Zinc-nickel alloy coatings can be obtained from two different systems, acidic and alkaline, both capable of producing deposits of exceptional corrosion resistance with the nickel content of 10-14% and 5-10% respectively. In this study, nano crystalline zinc-nickel coatings were electro-deposited on mild steel substrates from an electrolyte containing zinc bromide, nickel chloride and boric acid at pH 4. The bath and deposit characteristics such as cathode current efficiency, rate of build up, nature of deposit, anode efficiency, throwing power and micro hardness were studied. The morphology and structure were also examined by SEM and XRD.

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