镀锡板无铬钝化机理研究  

Study on the mechanism of chromium-free passivation of tinned plate

作　　者：万一群[1] 沈鹏杰 孙宇[1] 胡建军[1] 周纪名 刘海涛[2] WAN Yiqun;SHEN Pengjie;SUN Yu;HU Jianjun;ZHOU Jiming;LIU Haitao(Shougang Jingtang Iron and Steel United Co.,Ltd.,Tangshan 063210,China;State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]首钢京唐钢铁联合有限责任公司,河北唐山063210 [2]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《轧钢》2021年第3期32-37,共6页Steel Rolling

摘　　要：在当前无铬钝化的发展方向下,采用钛锆-磷硅体系无铬钝化液对镀锡板进行了钝化处理。利用扫描电子显微镜观察钝化膜微观形貌,并借助电子探针表征钝化膜特征元素在低倍和高倍时的分布规律,对钝化膜进行X射线电子能谱分析以研究元素价态,并利用辉光放电能谱研究钝化膜特征元素沿表层深度的分布规律。研究发现,无铬钝化反应首先发生在镀锡板能量较高的位置,钝化膜中元素含量随表层深度的变化而变化,无铬钝化反应过程是分阶段进行的,钝化膜由氧化层、无机层和有机层3层结构组成,钝化膜的骨架为含有Ti、Zr等成膜主盐元素的无机层。Under the current developing direction of the chromium-free passivation, a solution containing titanium, zirconium, phosphorus and silicon was used to fabricate tinned plate. Scanning electron microscopy was used to observe the micromorphology of passivation film, and the electron probe was used to characterize the distribution of characteristic elements of passivation film at low and high magnification respectively. It was found that the chromium-free passivation reaction initiated at the higher energy position of tinned plate first. At the same time, the valence states of elements in passive films were analyzed by X-ray electron spectroscopy, and the distribution of characteristic elements along the surficial depth of passive films was studied by glow discharge spectroscopy. It was found that the content of elements in passive film changed with the surficial depth. It indicated that the chromium-free passivation process was carried out in several stages. The passivation film consisted of different structural layers, including oxide layer, inorganic layer and organic layer. Among them, the inorganic layer containing main Ti, Zr and other main salt elements was the skeleton of chromium-free passivation film.

关 键 词：镀锡板 无铬钝化 钝化膜 微观形貌 成膜机理 

分 类 号：TG174.4[金属学及工艺—金属表面处理]