作　　者： ; ; ; ;

机构地区： 仲恺农业工程学院

出　　处： 《表面技术》 2010年第2期1-4,13,共5页

摘　　要： 采用循环伏安、恒电流阶跃和稳态极化等电化学研究方法和紫外分光度法,研究了Cr3+电沉积机理,结果表明其沉积过程分2步进行。计算得出Cr3+2步放电的表观活化能为34.9 kJ/mol和19.77 kJ/mol,表明Cr3+还原过程受电化学反应控制;初步拟定了甘氨酸作配体氯化物水溶液体系三价铬还原机理。 The mechanism of trivalent chromium eleetrodeposition and electrocrystallization from trivalent chromium in chloride system has been explored by using several kinds of electrochemical methods, such as cyclic voltammetry, chronopotentiometry, steady state polarization. [Cr（ H2O）6]^2＋reduction process is controlled by electrochemical reaction. [Cr（ H2O）4] 2 ＋ gets three electrons by two steps, their apparent activation energy is measured, one is 34.9 kJ/ mol, the other is 19.77 kJ/mol, the first reducing is rate control step. The middle product,which is electrochemically active and adsorptive, is formed in the first step.

关 键 词： 三价铬 电沉积 机理

领　　域： [化学工程]