Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Characterizations of Precipitated Zinc Powder Produced by Selective Leaching Method

  • Marwa F. Abd (Department of Production Engineering, and Metallurgy, University of Technology) ;
  • F. F. Sayyid (Department of Production Engineering, and Metallurgy, University of Technology) ;
  • Sami I. Jafar Al-rubaiey (Department of Production Engineering, and Metallurgy, University of Technology)
  • Received : 2022.05.04
  • Accepted : 2024.01.30
  • Published : 2024.02.29
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Abstract

This work investigated the influence of concentration and applied potential on the characteristics of zinc powder (purity, apparent density, morphology, particle size distribution, and particle zeta potential) produced by the electrochemical process from waste brass. High-purity zinc powder is obtained using selective leaching of industrial brass waste in acidic, neutral, and alkaline solutions. The free immersion method with and without voltage using linear polarization technique is used. In the electrochemical process, hydrochloric acid HCl in three different concentrations (0.1, 0.2, and 0.3) M is used. The time and the distance between the electrodes are set to be 30 min and 3 cm, respectively. It has been found that the percentage purity is 98%, 96%, and 94% for the acidic, neutral, and alkaline solutions, respectively. In addition, the morphology of zinc powder analyzed by SEM was dendritic and mossy. It has been recorded that the purity of zinc increases with the increase of the concentration and applied potential. The highest value of purity for zinc powder was %98.58 in 1000 mV and 0.3M concentration for graphite cathode.

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