Abstract
Zn-Ni coatings were deposited under galvanostatic conditions on steel substrate (OH18N9). The influence of current density of deposition on the surface morphology, chemical and phase composition was investigated. The corrosion resistance of Zn-Ni coatings obtained at current density 10–25 mA cm−2 are measured, and are compared with that of metallic cadmium coating. Structural investigations were performed by the X-ray diffraction (XRD) method. The surface morphology and chemical composition of deposited coatings were studied using a scanning electron microscope (JEOL JSM-6480) with EDS attachment. Studies of electrochemical corrosion resistance were carried out in the 5% NaCl, using potentiodynamic and electrochemical impedance spectroscopy (EIS) methods. On the ground of these research, the possibility of deposition of Zn-Ni coatings contained 24–26% at. Ni was exhibited. It was stated, that surface morphology, chemical and phase composition of these coatings are practically independent on current density of deposition. On the basis of electrochemical investigations it was found that corrosion resistance of these Zn-Ni coatings is also independent of current density. These coatings are more corrosion resistant in 5% NaCl solution than metallic cadmium. It was suggested that the Zn-Ni coating may be used as a substitute for toxic cadmium.
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References
Abd el Rehim S S, Fouad E E, Abd el Wahab S M and Hassan H H 1996 Electrochem. Acta 41 1413
Bajat J B, Kačarević-Popović Z, Mišković-Stankowić V B and Maksimowić M D 2000 Prog. Org. Coat. 39 127
Fratesi R and Roventi G 1996 Surf. Coat. Technol. 82 158
Ganesan P, Kumaraguru S P and Popov B N 2007 Surf. Coat. Technol. 201 7896
Gavrila M, Millet J P, Mazile H, Marchandise D and Cuntz J M 2000 Surf. Coat. Technol. 123 164
Karimi-Shervedani R and Lasia A 1997 J. Electrochem. Soc. 144 2652
Karimi-Shervedani R and Lasia A 1998 J. Electrochem. Soc. 145 2219
Petrauskas A, Grincevičienė L, Češūnienė A and Matulionis E 2005 Surf. Coat. Technol. 192 299
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Wykpis, K., Popczyk, M. & Budniok, A. Electrolytic deposition and corrosion resistance of Zn-Ni coatings obtained from sulphate-chloride bath. Bull Mater Sci 34, 997–1001 (2011). https://doi.org/10.1007/s12034-011-0228-8
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DOI: https://doi.org/10.1007/s12034-011-0228-8