We established the chemical composition, current efficiency, and corrosion properties of CoW and CoRe binary alloys and CoWRe ternary alloys obtained from electrolytes of two types: citrate and citrate-pyrophosphate. It was discovered that the alloys deposited from citrate electrolyte contain much more refractory metals [51.0 at.% Re and 46.2 (W + Re)] for the same current density of deposition (10 mA ⋅ cm–2) than the alloys deposited from citrate pyrophosphate electrolytes [13.5 at.% Re and 23.9 at.% (W + Re)]. The main advantage of application of citrate-pyrophosphate electrolytes is their high current efficiency (of up to 85.7%). The results of corrosion investigations carried out in a 3.5% NaCl solution show that the corrosion resistance of CoWRe alloys is higher than the corrosion resistance of CoRe alloys. Actually, they are equal to 3.2 and 2.8 k Ω ⋅ cm2 for citrate electrolytes and 5.4 and 3.6 k Ω ⋅ cm2 for citrate-pyrophosphate electrolytes, respectively. The corrosion resistances of the coatings depend on their phase compositions, in particular, on the formation of a solid solution of rhenium in cobalt for the CoRe alloy and appearance of a nanocrystalline coating for the CoWRe alloy.
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N. Tsyntsaru, A. Dikusar, H. Cesiulis, J.-P. Celis, Zh. Bobanova, S. Sidel’nikova, S. Belevskii, Yu. Yapontseva, O. Bersirova, and V. Kublanovskii, “Tribological and corrosive characteristics of electrochemical coatings based on cobalt and iron superalloys,” Powder Metall. Met. Ceram., 48, 419–428 (2009).
N. Eliaz and E. Gileadi, Induced Codeposition of Alloys of Tungsten, Molybdenum, and Rhenium with Transition Metals, Vol. 42: Modern Aspects of Electrochemistry, Springer, New York (2008).
O. L. Bersirova and V. S. Kublanovs’kyi, “Nickel–rhenium electrolytic alloys: synthesis, structure, and corrosion properties,” Fiz.-Khim. Mekh. Mater., 54, No. 4, 57–61 (2018); English translation: Mater. Sci., 54, No. 4, 506–511 (2019).
P. J. Cote, G. P. Capsimalis, and V. P. Greco, “Electrodeposition of an amorphous cobalt-rhenium alloy,” J. Electroсhem. Soc., 121, No. 6, 776–777 (1974).
M. V. Ved’, N. D. Sakhnenko, A. V. Karakurkchi, K. D. Pershina, and I. Yu. Yermolenko, “Corrosion properties of galvanic Fe–Mo(W), Fe–Mo–W coatings,” Funct. Mater., 26, 534–540 (2019).
Yu. S. Yapontseva, T. V. Maltseva, V. S. Kublanovsky, and O. A. Vyshnevskyi, “Electrоdeposition of CoWRe alloys from polyligand citrate-pyrophosphate electrolyte,” J. Alloys Comp., 803, 1–8 (2019).
Yu. S. Yapontseva, V. S. Kublanovsky, and O. A. Vyshnevskyi, “Electrodeposition of CoMoRe alloys from a citrate electrolyte,” J. Alloys Comp., 766, 894–901 (2018).
Y. S. Yapontseva, A. I. Dikusar, and V. S. Kublanovskii, “Study of the composition, corrosion, and catalytic properties of Co–W alloys electrodeposited from a citrate pyrophosphate electrolyte,” Surf. Eng. Appl. Electrochem., 50, 330 (2014).
Yu. Yapontseva, T. Maltseva, and V. Kublanovsky, “Electrosynthesis of nanostructured thin coatings with superalloys CoW, CoRe and CoWRe with valuable properties in hardness and corrosion resistance,” Mater. Today: Proc. (2019); DOI:https://doi.org/10.1016/j.matpr.2019.11.115.
L. Ma, X. Xi, Z. Nie, T. Dong, and Yu. Mao, “Electrodeposition and characterization of Co–W alloy from regenerated tungsten salt,” Int. J. Electrochem. Sci., 12, 1034–1051 (2017).
A. Davydov, V. Shaldaev, A. Malofeeva, O. Chernyshova, and V. Volgin, “Determination of corrosion rate of rhenium and its alloys,” Chem. Eng. Trans., 41, 289–294 (2014).
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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 56, No. 5, pp. 66–70, September–October, 2020.
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Yapontseva, Y.S., Маltseva, T.V. & Кublanovsky, V.S. Corrosion Properties of Electrolytic Coatings Based on СоW, CoRe, and CoWRe Alloys. Mater Sci 56, 649–653 (2021). https://doi.org/10.1007/s11003-021-00477-7
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DOI: https://doi.org/10.1007/s11003-021-00477-7