Nickel-Cobalt Alloy Deposition on Iron Substrate Using Electroless Deposition in Deep Eutectic Solvent

  • M Zaimi
  • M.A. Din
  • K. T. Lau
  • I. S. Othman
  • T. D. Widodo


Electroless deposition of Ni has been successfully done via deep eutectic solvent (DES) ionic liquid. In this study, a binary Ni-Co alloy is deposited on iron substrate using electroless deposition method in a DES ionic liquid. The DES was made from 2:1 ratio choline chloride-ethylene glycol mixture with various concentrations of nickel and cobalt salts. The coating surface hardness is measured using micro Vickers hardness tester. The coating surface morphology was observed using scanning electron microscope (SEM). Corrosion behavior of the coating in 3.5 wt% NaCl aqueous solution is evaluated using electrochemical measurement method. The thickness of the coating ranged in between 12 mm to 17 mm and shows compact and dense layer above iron surface. The coating made from higher Co to Ni salts ratio concentration in the DES exhibits higher hardness (202.36 Hv) compared to lower Co ratio coatings as well as pure Ni (185.38 Hv) and Co (196.72 Hv) coatings. The corrosion potential of Ni-Co alloy coating from 1:1 Ni to Co salts ratio DES has higher corrosion potential and shows passive oxidation surface compared to iron. Hence, the binary Ni-Co alloy deposition on iron improves the substrate’s surface hardness and corrosion resistance.


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G.O. Mallory and J.B. Hadju, Electroless Plating: Fundamentals and Applications. Florida: American Electroplaters and Surface Finisher Society, 1990.

S.A. Armyanov, E. Valova and J. Georgieva, “New features in electroless deposition of ternary coatings on the base of Ni-P and Co-P”, Zeitschrift fur Physikalische Chemie, vol. 225, no. 3, pp. 283-295, 2011.

P. Sahoo and S.K. Das, “Tribology of electroless nickel coatings – A review”, Materials and Design, vol. 32, no. 4, pp. 1760-1775, 2011.

M. Zaimi, M.N. Azran, M. Khaizaki, M. Alif, M.S.A. Aziz, M.A. ‘Azam, M.S. Kasim, R.F. Munawar and M.E. Abd Manaf, “ Electroless Ni-Co-Cu-P alloy deposition in alkaline hypophosphite based bath”, Key Engineering Materials, vol. 694, pp. 151-154, 2016.

M.N. Azran, M. Khaizaki, M. Alif, M. Zaimi, M.A. ‘Azam, M.S. Kasim, M.S.A. Aziz, T.J.S. Anand, C.H.C. Haron and J.A. Ghani, “ Electroless quaternary Ni-Cu-Co-P alloy deposition mechanism in acidic bath using cyclic voltammetry measurement”, Jurnal Teknologi”, vol. 79, no.5-2, pp. 7-13, 2017.

H. Liu, N. Li, S. Bi and D. Li, “Gold immersion deposition on electroless nickel substrate”, Journal of the Electrochemical Society”, vol. 154, no. 12, pp. D662-D668, 2007.

A.P. Abbot, K. El Ttaib, K.S. Ryder and E.L. Smith, “Electrodeposition of nickel using eutectic based ionic liquids”, Transactions of the Insititute of Metal Finishing, vol. 86, no. 4, pp. 234-240, 2008.

G. Saravanan and S. Mohan, “Structure, composition and corrosion resistance studies of Co-Cr alloy electrodeposited from deep eutectic solvent (DES)”, Journal of Alloys and Compounds, vol. 522, pp. 162-166, 2012.

A.A.C. Alcanfor, L.P.M. dos Santos, D.F. Dias, A.N. Correia and P. de Lima-Neto, “Electrodeposition of indium on copper from deep eutectic solvents based on choline chloride and ethylene glycol”, Electrochimica Acta, vol. 234, pp. 553-560, 2017.

F. Liu, Y. Deng, X. Han, W. Hu and C. Zhong, “Electrodeposition of metals and alloys from ionic liquids”, Journal of Alloys and Compounds, vol. 654, pp. 163-170, 2016.

M. Rostom Ali, Md Ziaur Rahman and S. Sankar Saha, “Electroless and electrolytic deposition of nickel from deep eutectic solvents based on choline chloride”, Indian Journal of Chemical Technology, vol. 21, pp. 127-133, 2014.

C.G. Ong, K.T. Lau, M. Zaimi, M. Afiq and K.P. Queck, “Effect of electroless Ni-P thickness on EFTECH 64-Ni, EFTECH 64-Cu and C194-Ni bump”, in 11th International Microsystems, Packaging, Assembly and Circuit Technology Conference (IMPACT), Taipei, Taiwan, 2016, pp. 319-322.

How to Cite
Zaimi, M., Din, M., Lau, K. T., Othman, I. S., & Widodo, T. D. (1). Nickel-Cobalt Alloy Deposition on Iron Substrate Using Electroless Deposition in Deep Eutectic Solvent. Journal of Advanced Manufacturing Technology (JAMT), 12(1(3), 1-10. Retrieved from