Electrodeposition of Co-W coatings from boron gluconate electrolyte with a soluble tungsten anode

被引：17
|
作者：
Belevskii, S. S. [1 ]
Bobanova, Zh. I. [1 ,2 ]
Buravets, V. A. [1 ]
Gotelyak, A. V. [2 ]
Danil'chuk, V. V. [2 ]
Silkin, S. A. [2 ,3 ]
Dikusar, A. I. [2 ,3 ]
机构：
[1] Moldavian Acad Sci, Inst Appl Phys, Ul Akad Skaya 5, MD-2028 Kishinev, Moldova
[2] Taras Shevchenko Transnistria State Univ, Str 25 Octombrie 107, MD-3300 Tiraspol, Moldova
[3] Nekrasov Kostroma State Univ, Ul Dzerzhinskogo 17, Kostroma 156005, Russia
来源：
RUSSIAN JOURNAL OF APPLIED CHEMISTRY | 2016年 / 89卷 / 09期
关键词：
GEL-CHROMATOGRAPHIC SEPARATION; SLIDING WEAR BEHAVIOR; COBALT-TUNGSTEN; ELECTROCHEMICAL ACTIVITY; MECHANICAL-PROPERTIES; INDUCED CODEPOSITION; CITRATE ELECTROLYTE; ALLOY COATINGS;
D O I：
10.1134/S107042721609007X
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Conditions were determined in which an active anodic dissolution of tungsten is observed in a borongluconate electrolyte used to obtain Co-W coatings (pH similar to 6.5) and the nature of critical currents of transition to the passivation was found, which makes it possible to use the tungsten anode as a soluble electrode. The anodic dissolution of tungsten occurs under these conditions with a current efficiency of 90-100%, which, in contrast to the case of a graphite anode, does not lead to an additional oxidation of the electrolyte components and polymerization in solution; in combination with the decrease in the concentration of tungstate ions, this reduces the electrolyte performance. It was shown that the use of a soluble tungsten anode in obtaining nanocrystalline cobalt-tungsten coating can improve the electrolyte performance due to the rise in the current efficiency of electrodeposition and to the increase in the microhardness of the coatings in comparison with the case of an insoluble graphite anode.
引用
收藏
页码：1427 / 1433
页数：7
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