Electrodeposition of nanocrystalline Co-W coatings from citrate electrolytes under conditions of controlled hydrodynamic: II. The electrodeposition rate and composition of the coatings

被引：9

作者：

Belevskii, S. S. ^{[1
]}

Tsyntsaru, N. I. ^{[1
]}

Dikusar, A. I. ^{[1
,2
]}

机构：

[1] Moldavian Acad Sci, Inst Appl Phys, MD-2028 Kishinev, Moldova

[2] Shevchenko Pridnestrove State Univ, Tiraspol, Moldova

来源：

SURFACE ENGINEERING AND APPLIED ELECTROCHEMISTRY | 2010年 / 46卷 / 02期

关键词：

TUNGSTEN ALLOYS; INDUCED CODEPOSITION; COBALT; BEHAVIOR; NICKEL; IRON; AMORPHOUS/NANOCRYSTALLINE;

D O I：

10.3103/S106837551002002X

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The influence of the ionic mass-transfer effects on the deposition rate, the current efficiency, and the composition and morphology of the coatings has been studied using a rotating cylindrical electrode in a citrate electrolyte containing CoSO4 (0,2 mol/l) and Na2WO4 (0.2 mol/l) (pH = 6.8) at the electrodeposition temperature of 60A degrees C. It has been found that the decrease of the electrodeposition potential and the tungsten concentration in the coating with the current efficiency increase upon the Re number growth (Re a parts per thousand yen 200) occur only under galvanostatic conditions. At the potentiostatic mode, similar of influence fails to be observed. It is shown that the estimated effects take place due to the electrodeposition through the nonstoichiometric surface coating layer with electronic conductivity, the composition components of which are in electrochemical equilibrium with the components of the solution at the film-solution boundary.

引用

页码：91 / 99

页数：9

共 32 条

[1]

Atanassov N, 1997, PLAT SURF FINISH, V84, P67

[2] Electrodeposition of Nanocrystalline Co-W Coatings from Citrate Electrolytes under Conditions of Controlled Hydrodynamics: Part 1 Co Electrodeposition [J].

Belevskii, S. S. ;

Yushchenko, S. P. ;

Dikusar, A. I. .

SURFACE ENGINEERING AND APPLIED ELECTROCHEMISTRY, 2009, 45 (06) :446-454

[3] Micromechanical and Tribological Properties of Nanocrystalline Coatings of Iron-Tungsten Alloys Electrodeposited from Citrate-Ammonia Solutions [J].

Bobanova, Zh. I. ;

Dikusar, A. I. ;

Cesiulis, H. ;

Celis, J. -P. ;

Tsyntsaru, N. I. ;

Prosycevas, I. .

RUSSIAN JOURNAL OF ELECTROCHEMISTRY, 2009, 45 (08) :895-901

[4]

Bobanova Zh.I., 2005, ELEKT OBRAB MAT, P86

[5]

BRENNER F, 1963, ELECTRODEPOSITION AL

[6] Increase in rate of electrodeposition and in Ni(II) concentration in the bath as a way to control grain size of amorphous/nanocrystalline Ni-W alloys [J].

Cesiulis, H ;

Baltutiene, A ;

Donten, M ;

Donten, ML ;

Stojek, Z .

JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 2002, 6 (04) :237-244

[7] Electrodeposition of amorphous/nanocrystalline and polycrystalline Ni-Mo alloys from pyrophosphate baths [J].

Donten, M ;

Cesiulis, H ;

Stojek, Z .

ELECTROCHIMICA ACTA, 2005, 50 (06) :1405-1412

[8] Bulk and surface composition, amorphous structure, and thermocrystallization of electrodeposited alloys of tungsten with iron, nickel, and cobalt [J].

Donten, M .

JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 1999, 3 (02) :87-96

[9] Pulse electroplating of rich-in-tungsten thin layers of amorphous Co-W alloys [J].

Donten, M ;

Stojek, Z .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 1996, 26 (06) :665-672

[10] IONIC MASS TRANSFER AND CONCENTRATION POLARIZATION AT ROTATING ELECTRODES [J].

EISENBERG, M ;

TOBIAS, CW ;

WILKE, CR .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1954, 101 (06) :306-320

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