Significance of Limiting Current Density by Influence of the Process Parameter for the Electrodeposition System Rajkumar S. R.1,*, Alagar M.2, Somasekaran S.3, Ravisankar S.R.4 1Department of Physics, Rajapalayam Rajus'College, Madurai Kamaraj University, Rajapalayam-626117, Tamil Nadu, India 2Center for Research and Post Graduate Department of Physics, Ayya Nadar Janaki Ammal College (Autonomous), Madurai Kamaraj University, Sivakasi-626124, Tamil Nadu, India 3Department of Physics, Rajapalayam Rajus'College, Madurai Kamaraj University, Rajapalayam-626117, Tamil Nadu, India 4Department of Atomic Energy (Govt. of India), Heavy Water Plant, Tuticorin-628007, Tamil Nadu, India *Corresponding author: dhamburjpm@gmail.com
Online published on 16 May, 2016. Abstract In this investigation, the process parameters for the electrodeposition of zinc has been carried out using direct current. Cathode current efficiency (CCE%) and deposit thickness were determined by weight measurement method. Manipulation of current density on the deposition process was also investigated. Effect of temperature on the deposition process and deposit morphology was also studied. Cathodic polarisation and Bath agitation measurements were used to study the mass transport conditions of the electrolytic bath. Field Emission Scanning Electron Microscopes were utilised to study the morphologies of the deposits. Temperature and pH changes had marked influence on the morphology of the deposits. It was observed that cathode current efficiency was dependent on the current density and bath temperature, while deposit thickness was dependent on current density, bath agitation and time. Cathodic polarisation studies revealed that bath agitation and composition had significant effect on the limiting current density and hence mass transport of the bath. Top Keywords Cathode current efficiency, morphology, cathode polarisation, mass transport, limiting current density. Top |