Volume 8, Issue 6, November 2020, Page: 125-130
Effects of Diamond Nanoparticles on the Microstructure, Hardness and Corrosion Resistance of Chromium Coatings
Vladimir Petkov, Institute of Metal Science, Equipment and Technologies, Bulgarian Academy of Sciences, Sofia, Bulgaria
Radoslav Valov, Institute of Metal Science, Equipment and Technologies, Bulgarian Academy of Sciences, Sofia, Bulgaria
Received: Oct. 20, 2020;       Accepted: Nov. 4, 2020;       Published: Nov. 27, 2020
DOI: 10.11648/j.ajche.20200806.11      View  94      Downloads  57
Abstract
Electrodeposited coatings of chromium and diamond nanoparticles on steel were obtained. The chromium is plated directly on the steel matrix without any intermediate layers. The influence of the electrodeposition current density, the electrodeposition time and the concentration of diamond nanoparticles in the chromium-plating electrolyte on the microstructure, the phase composition, the microhardness and the corrosion resistance of the chromium coatings were investigated. The phase and chemical compositions of the composite coating (chromium and diamond nanoparticles) were examined using X-ray Diffraction (XRD) and Scanning Electron Microscopy - Energy-Dispersive X-ray Spectroscopy (SEM-EDS) techniques. The microstructure and microhardness were examined with a metallographic microscope and a microhardness tester. The corrosion resistance was investigated in 3.5 wt % NaCl solution using the gravimetric method. The bond between the chromium coating and the steel matrix has diffusion character. A sublayer of separate irregular shape formations appears at concentration of diamond nanoparticles 25 g/l and more. The formation of these structures depends only on the concentration of diamond nanoparticles and is not influenced by the other electrodeposition parameters. With the increase of the concentration of diamond nanoparticles in the electrolyte the rate of chromium coating deposition increases and respectively the thickness of the coating increases also. This increase is more than twice the thickness of chromium coating without nanodiamonds. The microhardness of the composite coatings rises also compared to unmodified chromium coating. With the increase of the concentration of the diamond nanoparticles 2 times greater microhardness is achieved and up to 5 times greater corrosion resistance compared to monochromium coating. The values of the other electroplating parameters are constant.
Keywords
Diamond Nanoparticles, Chromium Coating, Electrodeposition, Hardness, Corrosion
To cite this article
Vladimir Petkov, Radoslav Valov, Effects of Diamond Nanoparticles on the Microstructure, Hardness and Corrosion Resistance of Chromium Coatings, American Journal of Chemical Engineering. Vol. 8, No. 6, 2020, pp. 125-130. doi: 10.11648/j.ajche.20200806.11
Copyright
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Reference
[1]
Yordanov S., Stambolova I., Lakov L., Blaskov V., Jivov B., Alexandrova M., Jivov B., Valkanov S., Eliyas A., Sol-gel SiO2 coatings doped with Nd2O3, Bulgarian Chemical Communications, Special Issue A, vol. 49, (2017), 29-32.
[2]
Shenderova O., Dieter M., Nanocrystalline Diamonds, Willian Andrew Publishing, Norwich, N. Y., USA, (2006), 335-342.
[3]
Dolmatov V., Burkat G., Myllymäki V. and Vehanen A., Electrochemical chromium-diamond coating, Journal of Superhard Materials, vol. 37, (2015), 82–100.
[4]
Isakov V. P., Lyamkin A. I., Nikitin D. N., Salimova A. S. and Solntcev A. V., Structure and properties of chromium composite electrochemical coatings, Physical Chemistry of Surfaces and Protection of Materials (Fizikohimia Poverchnosti i Zaschtita Materialov), vol. 46, No 5, (2010), 506-509.
[5]
Dolmatov V. Y., Fujimura T., Barkat G. K. and Veretennikova M. V., Preparation of wear-resistant chromium coatings using different types on nanodiamonds, Powder Metallurgy and Metal Ceramics, vol. 42, No 11-12, (2003), 587-591.
[6]
Mandlich N. V. and Dennis J. K., Codeposition of nanodiamonds with chromium, Metal Finishing, June, (2001), 117-121.
[7]
Vityas P. A., Zhornik V. I., Shtemplyak R. G. and Kovaleva S. A., Influence of nanosized carbon additives on the structure, formation and tribological behavior of galvanic chrome coatings, Friction and Wear (Trenie i Iznos), vol. 30, No 2, (2009), 132-139.
[8]
Tikhonov K. L., Barkat G. K., Dolmatov V. Y. and Orlova E. A., Use of diamond stock in chromium plating, Russian Journal of Applied Chemistry, vol. 80, No 7, (2007), 1082-1086.
[9]
Barkat G. K., Dolmatov V. Y, Osawa E. and Orlova E. A., A study of properties of chromium diamonds coatings using nanodiamonds from various producers, Super Hard Materials (Sverkhtverdye Materialy), vol. 32, No 2, (2010), 43-59.
[10]
Petkov V., Valov R., Witkowska M., Madej M., Cempura G., Sułowski M., Sintered steels coated with a chromium layer doped with diamond nanoparticles, Arch. Metall. Mater. vol. 64, No 4, (2019), 1633-1638.
[11]
Nguyen V. H., Hoang T. N., NguyenN. T., Kwon S. C., Joo M. K. and Lee Y., Cr/nanodiamonds composite plating with cobalt cation additive, Metals Society of China, 19, (2009), 975-978.
[12]
Wang L., Gao Y., Xue Q., Liu H. and Xu T., Effects of nano-diamond particles on the structure and tribological property of Ni-matrix nanocomposite coatings, Materials Science and Engineering, A 390 (2005), 313-318.
[13]
Addel A., Hard and corrosion resistant nanocomposite coating for Al alloy, Materials Science and Engineering, A, 474 (2008), 181-187.
[14]
Gidikova N., Sulowski M., Madej M., Valov R., Petkov V., Mechanical properties of composite coatings of chromium and nanodiamonds on aluminum, MATEC Web of Conferences, 145, 05012, (2018), 1-2.
[15]
Krueger A., The structure and reactivity of nanoscale diamonds, Journal of Materials Chemistry, 18, (2008), 1485-1492.
[16]
Raty J. Y., Galli G., Bosted C., van Bauren T. W. and Terminello L. Y., Quantum confinement and fullerene like surface reconstruction in nanodiamonds, Phys. Rev. Lett., 90. 037401, (2003).
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