An Electrochemical Procedure for Copper Removal from Regenerated Pickling Solutions of Steel Plants

  • Esra Karakaya
  • Mustafa Serdal Aras
  • Metehan Erdoğan
  • Sedef Çift Karagül
  • Merve Kolay Ersoy
  • İshak Karakaya
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Pickling is the treatment of metal surfaces by removing oxide layer, rust, scale, inorganic contaminants or other impurities from ferrous metals, copper or precious metals. A strong inorganic acid such as hydrochloric acid is used for plain carbon or low alloy steel pickling. When the concentration of copper in the pickling solution exceeds about 100 mg/L, reversion may take place and randomly plating of copper onto the steel strips which causes visual incompatibility occur. Furthermore, efficiency of pickling decreases with the increase of copper content. The reversion may be delayed to higher Cu concentrations by adding fresh acid to the line. Increased acid consumption only delays the time to discard the solution but increases the cost and hazardous nature effect on the environment. An experimental electrochemical procedure has been conducted to remove copper from pickling solution to reduce the concentration below 100 mg/L. Within this scope, effects of applied current density, copper concentration and electrolysis duration on copper deposition were studied. Current density was determined as the most effective parameter to remove copper from the regenerated pickling solutions of steel plants.

Keywords

Pickling solution Copper Electrochemical treatment Environmental treatment Current density 

Notes

Acknowledgements

Authors express their gratitude to Borusan Technology Department and R&D Co. for the economical support in the project.

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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  • Esra Karakaya
    • 1
    • 2
  • Mustafa Serdal Aras
    • 2
  • Metehan Erdoğan
    • 3
  • Sedef Çift Karagül
    • 4
  • Merve Kolay Ersoy
    • 4
  • İshak Karakaya
    • 1
  1. 1.Department of Metallurgical and Materials EngineeringMiddle East Technical UniversityAnkaraTurkey
  2. 2.MEGAP Co.AnkaraTurkey
  3. 3.Department of Metallurgical and Materials EngineeringYıldırım Beyazıt UniversityAnkaraTurkey
  4. 4.Borusan Technology Department and R & D Co.İstanbulTurkey

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