Zn–Fe alloy electrodeposition from chloride bath: Influence of deposition parameters on coatings morphology and structure

Abstract

In this study, the kinetics of Zn–Fe codeposition was investigated in chloride acidic solution using cyclic voltammetry. Anomalous codeposition is detected and this mechanism depends on the Zn(II)/Fe(II) concentration ratio in the electrolytic bath. Influence of deposition parameters on the morphology and structure of the coatings is discussed using characterization techniques and using the anodic linear sweep voltametry (ALSV). The ratio between Zn(II)/Fe(II) considerably influences the structure of the alloys. Dense, uniform, and single‐phased Zn–Fe coatings could be obtained.

Controllable constructing alloy dendrites with fractal structure as free‐standing electrode for enhanced oxygen evolution

“…As shown in Figure A, the XRD patterns of all dendrites showed three sharp diffraction peaks around 44.65°, 64.98°, and 82.28°, corresponding to the (1 1 0), (2 0 0), and (2 1 1) crystal plane of kamacite (JCPDS: 37‐0474). With the increase of Ni 2+ concentration, the weak diffraction peaks were assigned to the (1 1 1), (2 0 0), and (2 2 0) planes of taenite (γ‐Fe, Ni) (JCPDS: 47‐1405) . Figure B reveals the XRD diagram of the 3D Zn‐Fe dendrites constructed under the different concentrations of Zn 2+ .…”

“…With the increase of Ni 2+ concentration, the weak diffraction peaks were assigned to the (1 1 1), (2 0 0), and (2 2 0) planes of taenite (γ-Fe, Ni) (JCPDS: 47-1405). 51 Figure 6B reveals the XRD diagram of the 3D Zn-Fe dendrites constructed under the different concentrations of Zn 2+ . With the concentration of Zn ion in the initial solution reaching above 50 g L −1 , diffraction peaks of FeZn alloys in different forms appear in the XRD patterns of three alloy dendrites.…”

The Formation of Passive Layers on Zinc Based Platings

“…For the higher electrolytic concentration of iron in the acidic chloride electrolytic bath (Zn(II)/Fe(II) concentration rate = 1/6) the presence of ζ-phase is highlighted. 31 In presence of this study, current density and Zn(II)/Fe(II) concentration rate were attempted to be 7.8 mA cm -2 and 2, respectively. Fig.…”

“…In particular, because electrodeposited ZnFe alloy coatings possess several superior properties such as excellent paintability, good welding properties and good corrosion resistance. [3][4][5][6][7][8][9][10] At the same time, zinc based coating surfaces are still coated with thin chromate or phosphate layers. There have been several studies on the application of chromatings and phosphate coatings to improve the corrosion resistance of certain coatings used in automotive industry, industrial pipes and household items.…”

Corrosion mechanism and kinetics of Al-Zn coating deposited by arc thermal spraying process in saline solution at prolong exposure periods

“…The most widely used protective system involves the deposition of sacrificial metals such as barrier types of coating on a steel substrate. To date, cadmium, zinc, zinc alloys, Zn-Co-Fe, and zinc-resin hybrid coating 2–8 and chromium- or nickel-based 9,10 systems are most commonly used to protect steel structures from corrosion. Furthermore, hot dip galvanized coating and heavy duty paint that contain zinc and zinc rich primer with epoxide and fluoride resin are also used to protect steel structures in aggressive environments 11–13 .…”