A study on electrodeposited Zn–Co alloys

Abstract

In this study, the corrosion properties of Zn-Co alloys prepared by the electrodeposition method from a sulfate bath under potentiostatic conditions on steel and aluminum substrates have been investigated. The deposit morphology and elemental composition were examined by scanning electron microscopy (SEM)/EDX. The preferred crystallographic orientations of the deposits have been determined by the x-ray diffraction (XRD) technique. The effects of bath composition on the phase structure, morphology and corrosion behaviors have been studied. It has been observed that the cobalt content strongly affects the structure and corrosion stability of Zn-Co alloys. It was found that amorphous alloys were obtained with high Co contents, while crystalline alloys were formed with high Zn contents.

Electrodeposition of Cobalt Rich Zn-Co alloy Coatings from Citrate Bath

“…Therefore, the increase in current density may favor the cobalt deposition. Similar results were shown by Karahan et al 1 and Roventi et al 11 in the deposition of Zn-Co alloys from a bath containing sodium citrate.…”

“…These results show the limitation of using only these experiments to verify the deposition process of metallic alloy coatings. hydroxide oscillation 1,3 . Therefore, the increase in current density may favor the cobalt deposition.…”

“…Zn coatings are generally used to protect steel components, acting as sacrifice coatings, and decreasing the substrate material corrosion 1 . Szczygiel et al 2 and Chen and Sun 3 have shown that the co-deposition of zinc with other metals, such as nickel, iron and cobalt, enhances the anticorrosive properties of the zinc coatings.…”

Poly(N-methylpyrrole) Film on ZnNi Plated Carbon Steel Electrode

“…[2][3][4][5][6][7][8] But these zinc alloys exhibit a significantly higher corrosion resistance than pure zinc coating. [9][10][11][12][13][14][15][16] Conducting polymers like polyaniline, polythiophene and polypyrrole have shown wide range of applications due to their very interesting physical properties. Some of their important properties include electrical conductivity, electroactivity, electrochromism, environmental stability, chemical stability and corrosion inhibitive property.…”

Electrodeposition and Corrosive Properties of Environmental ZnFe/Polyaniline on Low Carbon Steel

“…The plating of mild steel and iron by metals such as zinc, chrome, and nickel has been widely used to protect them against corrosion for many years [1][2][3][4][5][6]. Thin top coat phosphatation and chromatation on electrodeposited metal coatings have improved the corrosion resistance of the substrates [7].…”