Cr(Ⅲ)水溶液电沉积非晶态铬的电化学

来源期刊：中国有色金属学报2000年第1期

论文作者：何湘柱 龚竹青 蒋汉瀛

文章页码：95 - 100

关键词：电沉积；非晶态铬；电化学

Key words：electrodeposition; amorphous chromium; electrochemistry

摘    要：提供了一种由络合剂、稳定剂、添加剂组成的Cr(Ⅲ)水溶液电镀镜面非晶态铬新方法。采用Hull槽实验、动电位扫描(LSV)、计时电流(CA)、计时电位(CE)等电化学方法对Cr(Ⅲ)水溶液中电沉积非晶态铬的电化学机理进行了研究。实验结果表明在-0.96～-1 .1 V之间生成的蓝膜是光亮非晶态Cr层得以电沉积出来的首要条件。讨论了Cr²⁺离子和Cr(Ⅲ)配合离子在电沉积非晶态铬镀层中的作用以及镜面非晶态铬镀层的形成机理。并用X射线衍射和扫描电子显微镜(SEM)等方法对铬镀层的结构进行了检测分析。

Abstract: A new type of Cr(Ⅲ) aqueous solution containing complexing agent, stabilizer and additives has been proposed for the electrodeposition of a mirror bright amorphous chromium. The mechanism of electrodeposition of amorphous chromium in the bath are studied by means of Hull cell experiment, linear sweep voltammetry (LSV), chronoamperometry (CA) and chronopotentiometry (CE). Experiments show that the electrodeposition of a blue film composed of Cr(OH)₃, which were electrodeposited firstly at -0.96～-1.1V in the bath, is a prerequisite for the electrodeposition of the mirror bright amorphous chromium layer. The roles of Cr²⁺ and Cr(Ⅲ) complexes for electrodeposition of amorphous chromium and the mechanism of electrodeposition we re discussed. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the chromium deposits.

基金信息：国家自然科学基金资助项目