期刊
JOURNAL OF APPLIED ELECTROCHEMISTRY
卷 43, 期 8, 页码 839-846出版社
SPRINGER
DOI: 10.1007/s10800-013-0571-0
关键词
Composite coating; Zinc; SiC; Nanoparticles; Electrodeposition; Microhardness
Zn-SiC composite coatings were obtained on mild steel substrate by electrodeposition technique with high-current efficiency. A slightly acidic chloride bath, containing SiC nanoparticles and gelatine as additive, was used. The electrodeposition was carried out under galvanostatic control with pulsed direct current; the effect of experimental parameters (temperature, average current density and particles concentration) on composition, morphology and structure of the deposit was studied. Coatings were characterized by means of scanning electron microscopy, energy dispersive X-ray analysis, X-ray diffractometry and Vickers microhardness measurements. Zn-SiC electrodeposits with the best characteristics were obtained by performing electrodepositions at 45 A degrees C, with 20 g L-1 SiC in the bath and with average current density in the range 100-150 mA cm(-2). Under these experimental conditions, homogeneous and compact coatings, with low-grain size and SiC content ranging from 1.7 to 2.1 wt%, were found to be electrodeposited. Microhardness measurements showed for these deposits an increase of about 50 % with respect to those without nanoparticles obtained in the same experimental conditions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据