Effect of some operating variables on the characteristics of electrodeposited Ni-alpha-Al2O3 and Ni-TiO2 composites

被引：16

作者：

Fawzy, MH ^{[1
]}

Ashour, MM ^{[1
]}

ElHalim, AMA ^{[1
]}

机构：

[1] AIN SHAMS UNIV,FAC SCI,CAIRO,EGYPT

来源：

TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING | 1996年 / 74卷

关键词：

D O I：

10.1080/00202967.1996.11871099

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrodeposition of Ni-alpha-Al2O3 and Ni-TiO2 composites was studied from baths containing 100 NiSO4.7H(2)O, 40 NiCl2.6H(2)O, 25 H3BO3 and Na-2 SO4. 10H(2)O with either 1-20 alpha-Al2O3 or 1-20 gl(-1) TiO2 particles suspended in the bath. During electrodeposition, the cathodic polarization increased with increase of both the size and concentration of the inert particle in the bath. An explanation of the mechanism of codeposition of the inert particles with nickel has been presented. The current efficiency of nickel electrodeposition is relatively high (95%) and is not affected by inclusion of the inert particles. As revealed by scanning electron microscopy, the growth morphology of the nickel deposit is affected by the inert particle content, the deposition current density and pH of the bath. The microhardness of the nickel deposit (116 kgf mm(-2)) increased with increase of the inert particle content and increase of the deposition current density until it reached 243 kgf mm(-2) as a maximum. The data obtained revealed that the microhardness of the deposit is a morphological-sensitive property.

引用

页码：72 / 77

页数：6

共 35 条

[1]

AOTANI K, 1986, PURETINGU TO KOTINGU, V6, P11

[2]

Bhagwat M. J., 1983, T I MET FINISH, V61, P72

[3]

BRANDES EA, 1967, METALLURGIA, V76, P195

[4] PREPARATION OF CATALYSTS BY METALLIC COMPLEX ADSORPTION ON MINERAL OXIDES [J].

BRUNELLE, JP .

PURE AND APPLIED CHEMISTRY, 1978, 50 (9-10) :1211-1229

[5]

DORDEVIC SE, 1976, GLAS HEM DRUS BEOGRA, V41, P261

[6] EFFECT OF BATH CONSTITUENTS AND SOME PLATING VARIABLES ON THE ELECTRODEPOSITION OF CADMIUM FROM ACIDIC CHLORIDE BATHS [J].

ELHALIM, AMA ;

SOBAHI, MI .

SURFACE TECHNOLOGY, 1983, 19 (01) :45-57

[7]

ELHALIM AMA, 1985, SURF TECHNOL, V26, P343

[8]

ELHALIM AMA, 1985, B CHEM SOC JPN, V58, P3555

[9]

ELHALIM AMA, 1993, T I MET FINISH, V71, P48

[10]

ELHALIM AMA, 1984, SURF TECHNOL, V22, P129

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