Effect of tungsten on microstructures of annealed electrodeposited Ni-W alloy and its corrosion resistance

Jinlong, Lv; Wang, Zhuqing; Liang, Tongxiang; Suzuki, Ken; Miura, Hideo

doi:10.1016/j.surfcoat.2018.01.070

Cited by 30 publications

(11 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The tungsten content obtained from the results of EDX was 25%, 21% and 22 wt% for the coatings deposited at TiC concentrations of 5 g/L, 15 g/L and 30 g/L, respectively. A similar effect was observed by different authors [15,37]. Accordingly, the number of Ni 2+ adsorbed on particles was low in the electrolyte at a low concentration of particles, resulting in the decreasing amount of co-deposited TiC particles in the matrix.…”

Section: Resultssupporting

confidence: 85%

“…Different researchers report that the hardness of the Ni-W coating has to change between 460 and 670 Hv depending on the crystallite size and W content of coating [14]. The Ni-W alloy (1.4 wt% tungsten) showed a tensile strength of about 1.3 GPa and tensile ductility of 2.7% [15]. It was found that the Ni-W alloy displayed a tensile strength of ~2300 MPa and good ductility.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pulse electro co-deposition of submicron-sized TiC reinforced Ni–W coatings: tribological and corrosion properties

Dilek

Algül

Akyol

et al. 2021

Journal of Asian Ceramic Societies

View full text Add to dashboard Cite

Nickel-Tungsten-Titanium carbide (Ni-W-TiC) coatings were produced by pulse electrodeposition from a Ni-W electrolyte containing TiC particles. The effects of TiC concentration in the electrolyte on the morphology, crystallite size, microstrain, mechanical, tribology and electrochemical properties of TiC reinforced Ni-W co-depositions were investigated. The highest hardness of 8.3 GPa and modulus of elasticity of 207 GPa were observed in the case of the coating produced at 15 g/L TiC concentration in the electrolyte. The increase in the H/E and H 3 / E 2 ratios led to displaying excellent wear resistance of the Ni-W-TiC co-depositions besides high resistance to plastic deformation. A direct correlation was observed between nanoindentation and wear resistance results of reinforced TiC co-depositions. It has also been shown by electrochemical impedance spectroscopy and potentiodynamic polarization analysis that TiC particles can improve the electrochemical properties of the co-depositions because of their barrier effect.

show abstract

Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Pulse electro co-deposition of submicron-sized TiC reinforced Ni–W coatings: tribological and corrosion properties

Dilek

Algül

Akyol

et al. 2021

Journal of Asian Ceramic Societies

View full text Add to dashboard Cite

show abstract

“…Thermal treatment can reduce the internal stress of the coatings and further improve their mechanical properties. However, most of the studies concerning the effect of heat treatments on hardness of electrodeposited W alloys have been performed on Ni-W [8,[13][14][15][16][17][18] and Ni-Fe-W [9,12] systems. Only a few studies have assessed the thermal stability and the phase transformations occurring upon annealing of Fe-W alloys [4,5,19].…”

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical properties and microstructural modifications in electrodeposited Fe-W alloys through controlled heat treatments

Mulone

Nicolenco

Fornell

et al. 2018

Surface and Coatings Technology

View full text Add to dashboard Cite

Among W alloys, FeW has seen much attention recently, due to the need of moving toward the design of environmentally friendly materials. Coatings with 4, 16 and 24 at.% of W were electrodeposited from an environmental friendly Fe(III)-based glycolate-citrate bath. The samples were annealed in vacuum at different temperatures up to 800 °C. Different crystalline phases are formed upon annealing: α-Fe, Fe2W, Fe3W3C, Fe6W6C, and FeWO4. Their grain size and distribution within the coating was studied by means of Electron Backscattered Diffraction (EBSD) technique. The effect of annealing on the mechanical properties of the coatings was analyzed performing nanoindentation measurements. The results show a considerable increase of the hardness followed by a rapid decrease at higher temperatures. The highest hardness value, i.e. 16.5 GPa, is measured for the sample with 24 at.% of W after annealing at 600 °C owing to the precipitation of α-Fe crystallites. This study indicates the possibility to substantially increase the hardness of electrodeposited FeW coatings by optimization of the annealing treatment. In addition, the critical influence of the carbide and oxide phases on the mechanical properties of alloys is discussed. Hence, FeW coatings rich in W can be applied as a possible candidate for protective coating applications at elevated temperatures.

show abstract

“…The different semicircle sizes indicate that the difficulty and speed of the corrosion reaction are different [31]. Fitting through the equivalent circuit diagram of Figure 8b, the results are shown in Table 4 and Table S2: where R ct is the charge transfer resistance, R s is the solution resistance, CPE 1 is the electric double layer capacitor, CPE 2 is the coating capacitor and R f is the coating resistance [32]. It can be seen that the R ct is largely improved from about 1000 to over 20,000 Ω cm 2 , after coating the Ni-W alloy in the Fe substrate, indicating that the coatings improved corrosion resistance [33].…”

Section: Electrochemical Properties Of Ni-15 Wt% W Alloy Coatingmentioning

confidence: 99%

Excellent Properties of Ni-15 wt.% W Alloy Electrodeposited from a Low-Temperature Pyrophosphate System

Liu

et al. 2021

Coatings

View full text Add to dashboard Cite

Electrodeposited Ni-W alloy coatings are considered to be one of the most suitable candidate coatings to replace carcinogenic hexavalent chromium coatings. In this work, Ni-W alloys are electrodeposited from pyrophosphate baths containing different concentrations of Na2WO4 2H2O (CW) at 40 °C. Both CW and the applied current density can affect the W content in the coatings. The effect of CW becomes weaker with the increased current density. The Ni-W alloys with 15 ± 5 wt.% W (Ni-15 wt.% W) are obtained from the bath containing 40 g L−1 CW at a high current of 8 A dm−2. The microhardness, corrosion resistance and hydrogen evolution reaction (HER) are measured with a microhardness tester and an electrochemical workstation. The modified properties are studied by heat treatment from 200 to 700 °C. The highest microhardness of 895.62 HV and the better HER property is presented after heat treatment at 400 °C, while the best corrosion resistance in 3.5 wt.% NaCl solution appears at 600 °C.

show abstract

Effect of tungsten on microstructures of annealed electrodeposited Ni-W alloy and its corrosion resistance

Cited by 30 publications

References 43 publications

Pulse electro co-deposition of submicron-sized TiC reinforced Ni–W coatings: tribological and corrosion properties

Pulse electro co-deposition of submicron-sized TiC reinforced Ni–W coatings: tribological and corrosion properties

Enhanced mechanical properties and microstructural modifications in electrodeposited Fe-W alloys through controlled heat treatments

Excellent Properties of Ni-15 wt.% W Alloy Electrodeposited from a Low-Temperature Pyrophosphate System

Contact Info

Product

Resources

About