Uniform nanoparticles of cobalt oxide precursors were prepared by the chemical precipitation in which the headspace vapors of ammonium hydroxide solution of known concentration were allowed to bubble through the aqueous solutions of cobalt sulfate, containing appropriate amount of the nonionic surfactant, octylphenoxy poly ethoxy ethanol. Scanning electron microscope (SEM) images showed that uniformity in particle size was dependent upon the applied precipitation conditions. Extensive optimization was therefore performed for the attainment of uniformity in particle size and shape. The amorphous precursor was transformed into crystalline Co3O4 as confirmed by X-ray diffractometry. These particles, with isoelectric point (IEP) at pH ∼ 8.4, were then employed as reinforcement additive for strengthening the electrodeposited nickel matrix. Effect of various parameters, i.e., stirring rate, applied current density, and temperature, was studied on the amount of the codeposited Co3O4 particles in the nanocomposite coatings (Ni–Co3O4) during the electrodeposition process. pH of the coating mixtures was kept below IEP value of Co3O4 so that the latter particles carried net positive surface charge. The coated surfaces were subjected to various tests, i.e., microhardness, wear/friction, and corrosion. Results revealed that irrespective of the amount of the embedded Co3O4 particles, nanocomposite coatings demonstrated superior performance as compared to pure nickel coatings.
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November 2017
Research-Article
Tribological Properties of Electrodeposited Ni–Co3O4 Nanocomposite Coating on Steel Substrate
Khalida Akhtar,
Khalida Akhtar
National Centre of Excellence in
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
e-mail: khalida_akhtar@yahoo.com
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
e-mail: khalida_akhtar@yahoo.com
Search for other works by this author on:
Hina Khalid,
Hina Khalid
National Centre of Excellence in
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Search for other works by this author on:
Ikram Ul Haq,
Ikram Ul Haq
National Centre of Excellence in
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Search for other works by this author on:
Naila Zubair,
Naila Zubair
National Centre of Excellence in
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Search for other works by this author on:
Zia Ullah Khan,
Zia Ullah Khan
National Centre of Excellence in
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Search for other works by this author on:
Abid Hussain
Abid Hussain
National Centre of Excellence in
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Search for other works by this author on:
Khalida Akhtar
National Centre of Excellence in
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
e-mail: khalida_akhtar@yahoo.com
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
e-mail: khalida_akhtar@yahoo.com
Hina Khalid
National Centre of Excellence in
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Ikram Ul Haq
National Centre of Excellence in
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Naila Zubair
National Centre of Excellence in
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Zia Ullah Khan
National Centre of Excellence in
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Abid Hussain
National Centre of Excellence in
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Physical Chemistry,
University of Peshawar,
Peshawar 25120, Pakistan
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received September 29, 2016; final manuscript received March 24, 2017; published online June 30, 2017. Assoc. Editor: Nuria Espallargas.
J. Tribol. Nov 2017, 139(6): 061302 (9 pages)
Published Online: June 30, 2017
Article history
Received:
September 29, 2016
Revised:
March 24, 2017
Citation
Akhtar, K., Khalid, H., Ul Haq, I., Zubair, N., Ullah Khan, Z., and Hussain, A. (June 30, 2017). "Tribological Properties of Electrodeposited Ni–Co3O4 Nanocomposite Coating on Steel Substrate." ASME. J. Tribol. November 2017; 139(6): 061302. https://doi.org/10.1115/1.4036450
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