Optimization of deposition conditions for development of high corrosion resistant Zn–Fe multilayer coatings

Yogesha, S.; Hegde, A. Chitharanjan

doi:10.1016/j.jmatprotec.2011.03.010

Cited by 30 publications

(4 citation statements)

References 21 publications

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“…Zn alloy single-layered electrodeposited coatings (such as Zn-Ni, Zn-Co and Zn-Fe coatings) have been extensively studied [4][5][6][7][8][9]. It has been shown that these coatings present very good anticorrosive properties, providing enhanced corrosion protection of ferrous substrates [9][10][11][12][13][14] and improved tribological behavior in comparison to the pure Zn electrodeposited coatings [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Zn–Fe multilayered alloy coatings produced by electrodeposition

2018

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Zn-Fe multilayered alloy coatings were deposited on mild steel substrates using the dual bath electrodeposition technique. The produced coatings consisted of alternate Zn-1 wt% Fe and Zn-10 wt% Fe alloy sub-layers. Their periodicity length (total thickness of two adjacent alternate sub-layers) ranged between 2 and 8 μm. The surface and the crosssectional morphology of those coatings were studied with the aid of a metallurgical microscope and a scanning electron microscope. The crystal structure of the electrodeposited multilayered coatings was investigated using an X-ray diffractometer. The Zn-1 wt% Fe and Zn-10 wt% Fe alloy sub-layers consisted of two phases: the η-phase (Zn-Fe solid solution) and the δ 1-phase (intermetallic FeZn 7). A microhardness tester equipped with a Vickers intender was used to examine the microhardness of the produced coatings. It was found that the microhardness increased with the decrease of periodicity length, following a modified Hall-Petch relationship.

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Section: Introductionmentioning

confidence: 99%

Zn–Fe multilayered alloy coatings produced by electrodeposition

2018

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“…Compared with electroless deposition, electrodeposition technique has proven to be less energy consumption, lower cost, and simpler process [17][18]. Because of those advantages, multilayer coating produced by electrodeposition has been widely studied on the corrosion resistance of material [19][20][21][22]. Multilayer coating may contain more than one element, which is more likely to occur cross contamination during electrodeposition, in order to obtain high-quality deposition, the required process and equipment is more complicated.…”

Section: Introductionmentioning

confidence: 99%

Jet electrodeposition multilayer nickel on the surface of sintered NdFeB and corrosion behaviours

Shen

Wang

Jiang

et al. 2017

Corrosion Engineering, Science and Technology

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Sintered neodymium (NdFeB) magnet material is highly vulnerable to corrosion. To solve this problem, three kinds of structures (dark nickel, bright nickel, and multilayered nickel) were produced efficiently and quickly by using jet electrodeposition technology. The structure and microstructure of the coatings were analysed by X-ray diffraction and field-emission scanning electron microscopy, respectively. The corrosion resistance of the samples was evaluated by potentiodynamic polarisation (Tafel). By comparing the corrosion behaviours of different structures, we found that the corrosion resistance of multilayered structure nickel coating was much higher than that of single layered nickel and the surface quality was significantly improved compared with dark nickel, which can better protect the NdFeB material.

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“…19 Today, in search of efficient surface coating materials for better corrosion protection, the focus has been on the development of compositionally nano-modulated multilayers, or simply nanolaminated alloy coatings in place of their conventional monolayer (monolithic, or homogeneous) coating. These coatings are popularly called composition modulated multilayer alloy (CMMA) coatings, 20,21 consisting of a sequence of two metals/alloys, deposited alternately one above the other. They are developed by pulsing periodically the current/voltage during deposition.…”

Section: Introductionmentioning

confidence: 99%