三乙四胺六乙酸消除高速镀锡液中铁杂质影响的研究  

Study of Iron Impurity Removal by TTHA in High-Speed Tin Plating

作　　者：曹立新[1] 韩清瑕[1] 李宁[2] 黄兴桥[2] 

机构地区：[1]哈尔滨工业大学(威海)海洋学院,山东威海264209 [2]哈尔滨工业大学应用化学系,黑龙江哈尔滨150001

出　　处：《材料保护》2006年第6期62-65,共4页Materials Protection

摘　　要：研究了采用三乙四胺六乙酸(TTHA)消除高速Ferrostan镀锡液中铁离子杂质影响的方法。采用X射线荧光光谱法(XRF)对镀层铁含量进行了测定,采用金相显微镜和原子力显微镜观测了镀层表面形貌。结果表明,TTHA能显著地提高镀层的表观质量,是一种能有效消除镀锡液中铁杂质影响的添加剂;还就TTHA影响阴极电沉积过程的作用机理进行了探讨,指出TTHA不仅可以通过螯合作用,还可以通过影响阴极电沉积过程有效地降低沉积过程中铁的干扰。The feasibility to remove iron impurity by triethyl-tetra-amine-hexa acetic acid(TTHA) in high-speed tin plating was investigated,which was aiming at eliminating the negative effect caused by the ferrous ions impurities.The content of Fe(Ⅱ) in the coating was determined by means of X-ray fluorescence spectroscopy.The morphology of the coating was observed using an optical microscope and an atomic force microscope,and the action mechanism of the TTHA in the electrodeposition process was discussed as well.It was found that HHTA was able to effectively eliminate the negative effect caused by the iron impurity and remarkably improve the coating quality.The reason lay in that TTHA was capable of eliminating the interference caused by iron(Ⅱ) by way of chelating effect and taking part in the electroplating process.

关 键 词：高速电镀锡 三乙四胺六乙酸 铁杂质 消除 机理分析 

分 类 号：TQ153.1[化学工程—电化学工业]