Electrodeposition of cobalt-tungsten alloys from acidic bath containing cationic surfactants

被引：65

作者：

Hamid, ZA ^{[1
]}

机构：

[1] Cent Met R&D Inst, Cairo, Egypt

来源：

MATERIALS LETTERS | 2003年 / 57卷 / 16-17期

关键词：

electrodeposition; electroplating; alloy plating; cobalt; tungsten corrosion;

D O I：

10.1016/S0167-577X(02)01311-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present work is devoted to the replacement of chromium coatings with a particular coating that has good properties and nonpolluting nature. Cobalt-tungsten alloys having high hardness were prepared by electrodeposition process. Optimum conditions of plating process including temperature, current density, concentration of metal ions and the critical concentration of the surfactants were studied. The surface properties of cationic surfactants were determined through surface tension measurements of the solution/air interface. Data of some surface and thermodynamic properties of the components were calculated. The alloys were subjected to heat treatment under nitrogen atmosphere at 400 degreesC. The surface morphologies of cobalt-tungsten alloy electrodeposits were studied before and after thermal treatment. The properties of the alloys such as microhardness and corrosion resistance were also examined and compared with chromium deposit. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：2558 / 2564

页数：7

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