Electroless deposition of high phosphorus Ni-P, Ni-Al2O3-P, Ni-Cu-P coatings and their corrosion behavior in 0.5M Na2SO4 solution

Authors

  • T. Ahmad Department of Metallurgy and Materials Engineering CEET, University of the Punjab Lahore
  • R. Bashir Department of Metallurgy and materials Engineering, University of Engineering and Technology Lahore
  • G. H. Awan Department of Metallurgy and materials Engineering, University of Engineering and Technology Lahore
  • M. Kamran Department of Metallurgy and Materials Engineering CEET, University of the Punjab Lahore
  • A. Ahmad Department of Metallurgy and materials Engineering, University of Engineering and Technology Lahore
  • L. A. kasuri Department of Metallurgy and materials Engineering, University of Engineering and Technology Lahore

Keywords:

Ni-P Polyalloy, Potentiodynamic polarization, Na2SO4 Solution, Heat treatment, Ni3P Phase

Abstract

Addition of other elements in Ni-P matrix is common practice for the improvement of electroless nickel deposit’s characteristics. Copper improves corrosion resistance, hardness and other properties of electroless nickel coatings. In this work Ni-P, Ni-Cu-P and Ni-Al2O3-P coatings were deposited on mild steel. Coatings thickness and composition were measured using elcometer and EDX respectively. Anti-corrosion properties of coatings were investigated in 0.5M Na2SO4 solution. The results showed that the corrosion resistance of Ni-Cu-P coatings in Na2SO4 solution was superior to Ni-P and Ni-Al2O3-P coatings. Coated samples were heat treated at 400 0C for 1 hr and hardness of as plated and heat treated samples was compared. The improvement in the hardness of coatings after heat treatment can be explained by the precipitation of nickel phosphide Ni3P.

Author Biographies

T. Ahmad, Department of Metallurgy and Materials Engineering CEET, University of the Punjab Lahore

Dr. Tahir Ahmad

Assistant Professor

Department of Metallurgy and Materials Engineering CEET, University of the Punjab Lahore

R. Bashir, Department of Metallurgy and materials Engineering, University of Engineering and Technology Lahore

Department of Metallurgy and Materials Engineering, UET Lahore

G. H. Awan, Department of Metallurgy and materials Engineering, University of Engineering and Technology Lahore

Department of Metallurgy and Materials Engineering, UET Lahore

M. Kamran, Department of Metallurgy and Materials Engineering CEET, University of the Punjab Lahore

Department of Metallurgy and Materials Engineering, CEET, University of the Punjab Lahore

A. Ahmad, Department of Metallurgy and materials Engineering, University of Engineering and Technology Lahore

Department of Metallurgy and Materials Engineering UET Lahore

Additional Files

Published

2015-08-10

How to Cite

Ahmad, T., Bashir, R., Awan, G. H., Kamran, M., Ahmad, A., & kasuri, L. A. (2015). Electroless deposition of high phosphorus Ni-P, Ni-Al2O3-P, Ni-Cu-P coatings and their corrosion behavior in 0.5M Na2SO4 solution. Journal of the Pakistan Institute of Chemical Engineers, 43(2), 85–92. Retrieved from http://piche.org.pk/journal/index.php/jpiche/article/view/256

Issue

Vol. 43 No. 2 (2015): Journal of the Pakistan Institute of Chemical Engineers

Section

Articles

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