抗坏血酸在电沉积铁中的应用  

Application of L-Ascorbic Acid in the Electrodeposition Bath of Iron

作　　者：李超群[1] 李新海[1] 王志兴[1] 郭华军[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《电镀与精饰》2008年第1期3-7,共5页Plating & Finishing

基　　金：国家自然科学基金资助项目(50302016)

摘　　要：在低碳钢带上电沉积铁,抗坏血酸用作氯化亚铁镀液的添加剂。研究了抗坏血酸质量浓度和pH对镀液稳定性的影响及抗坏血酸质量浓度、pH和温度对阴极电流效率的影响进行了分析。结果表明:抗坏血酸是一种有效的抗氧化剂,但阴极电流效率有所降低,得到满意铁沉积层的最优条件是:氯化亚铁250 g/L、抗坏血酸1 g/L、pH 1.5、温度45℃。得到的铁沉积层致密、晶粒小。Electrodeposition of iron on low carbon steel sheet was investigated with the aim to repair worn machine parts. Baths are ferrous chloride electrolyte and contain L-ascorbic acid as additive. A detailed study has been made of the influence of L-ascorbic acid concentration and bath pH on the stability of fer- rous chloride bath. The influence of L-ascorbic acid concentration and plating variables （bath pH value and temperature） on cathodic current efficiency has also been investigated. The optimum conditions for producing satisfactory iron deposits are： FeCl2· 4H2O 250 g/L, L-ascorbic acid 1 g/L, pH = 1.5 and 0 = 45 ℃. The surface morphology of the as-plated iron coating was investigated by using scanning electron microscopy （SEM） , and the structure was studied by using X-ray diffraction analysis.

关 键 词：抗坏血酸 电沉积铁 抗氧化性 阴极电流效率 

分 类 号：TQ153[化学工程—电化学工业]