Metallurgical Engineering

Metallurgical Engineering

Study on micro structure and wear behavior of Zn–Ni alloy coatings

Document Type : Research Paper

Authors
Saeed Reza Allahkaram 1
Mahshid Tafreshi 2
1 Professor, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran
2 MSc School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran
10.22076/me.2017.34414.1051
Abstract
Zn–Ni alloy coatings were electrodeposited from an acidic sulfate bath, while their microstructures, corrosion properties and wear behavior were investigated. To study their structures, X-ray diffraction (XRD) was used. To evaluate the wear behavior, wear tests via pin-on-disc were performed. Hardness measurements were carried out via Vickers microhardness testing machine. Secondary and backscattered electron micrographs were taken from the worn surfaces and chemical compositions of the coatings were also investigated using Scanning Electron Microscope (SEM) equipped with Energy Dispersive Spectroscopy (EDS) analyzer. X-ray diffraction (XRD) technique was also used to determine the phase structures of the coatings. The results indicated that the amount of nickel in the coating had a strong impact on their properties so that by increasing the amount of nickel an increase in the coating hardness was obtained. Finally, Zn-14% Ni coating which contained a single phase -Ni5Zn21 face centered cubic had the lowest coefficient of friction as well as wear rate among all other coatings with different chemical compositions.
Keywords
Zn–Ni alloy
Electrodeposition
Hardness
Microstructure
Wear
[1] a. Marder, "the metallurgy of zinc-coated steel", progress in materials science, vol. 45, issue. 3, 2000, pp. 191-271.
[2] n. Boshkov, "influence of the alloying component on the protective ability of some zinc galvanic coatings", electrochimica acta, vol. 51, issue. 1, 2005, pp. 77-84.
[3] d. Crotty, "zinc alloy plating for the automotive industry", metal finishing, vol. 94, issue. 9, 1996, pp. 54-58.
[4] h. A. Sorkhabi, a. Hahrah, n. Parvinin-ahmadi, j. Manzoori, "zinc–nickel alloy coatings electrodeposited from a chloride bath using direct and pulse current", surface and coatings technology, vol. 140, issue. 3, 2001, pp. 278-283.
[5] c. Chang hu, c. Kou wang,” effects of composition and reflowing on the corrosion behavior of sn–zn deposits in brine media”, electrochimica acta , vol. 51, issue. 20, 2006, pp. 1489–1497.
[6] k.r. Sriraman, h.w. Strauss, s. Brahimi, r.r. Chromik, j.a. Szpunar, j.h. Osborne,"tribological behavior of electrodeposited zn, zn–ni, cd and cd–ti coatings onlow carbon steel substrates”, tribology  international,vol. 56, 2012, pp. 107–120.
[7] c.n. Panagopoulos, k.g. Georgarakis, p.e. Agathocleous,” sliding wear behaviorof zinc–nickel alloy electrodeposits”, tribol. Int, vol. 36, issue. 8, 2003, pp. 619–623.
]8] s. Ghaziof, w. Gao,” electrodeposition of single gamma phased zn–ni alloy    coatingsfrom additive-free acidic bath”, applied surface science, vol. 311, 2014, pp.635–642.
[9] l. Lee, é. Régis, s. D. Richard, r. Chromik,” fretting wear behavior of zn–ni alloy coatings”  wear, vol. 330-331, 2015, pp. 112–121.
[10] k.r. Sriraman, h.w. Strauss, s. Brahimi, r.r. Chromik, j.a. Szpunar, j.h. Osborne,"tribological behavior of electrodeposited zn, zn–ni, cd and cd–ti coatings onlow carbon steel substrates”, tribology  international,vol. 56, 2012, pp. 107–120.
[15] x. Qiao, h. Li, w. Zhao, d. Li,”  effects of deposition temperature on electrodeposition of zinc-nicle alloy coatings”, electrochimica acta, vol. 89, 2013, pp. 771– 777.
[16] m. Gavrila, j.p. Millet, h. Mazille, d. Marchendise, j.m. Cuntz, “corrosion behavior of zinc-nickle coatings, electrodeposited on steel”, surface and coating technology, vol. 123, issues. 2-3, 2000, pp. 164-172.
 [17]  j. F archard, contact and rubbing of flat surfaces, journal of applied physics, vol. 24, issue. 8, 1953, p.981-988
[18] s. Mahdavi  , f. Akhlaghi , effect of the sic particle size on the dry sliding wear behavior of sic and sic–gr-reinforced al6061 composites, journal of materials science, vol. 46, issue. 24, 2011, pp 7883-7894.
[19] s. Mahdavi, s.r. Allahkaram, composition, characteristics and tribological behavior of cr, co–cr and co–cr/tio2 nano-composite coatings electrodeposited from trivalent chromium based baths, alloys and compounds, volume 635, 25 june 2015, pages 150–157.
[20] s. S. Abdelrehim, e. E. Fouad, s. M. Abdelwahab,” electroplating of zinc–nickel binary alloys from acetate baths”, electrochimica acta, vol. 41, issue. 9,  1996, pp. 1413-1418.
 [21] g. Bolelli , l. Lusvarghi , heat treatment effects on the tribological performance of hvof sprayed co-mo-cr-si coatings, journal of thermal spray technology, volume 15, issue 4, 2006, pp 802-810.

  • Receive Date 15 January 2016
  • Revise Date 01 October 2016
  • Accept Date 22 September 2016