通过预先加入Fe2+,采用中温磷酸盐化学转化法(PCC),在不锈钢表面制备结构均匀、致密的磷酸锌转化膜.采用X射线衍射仪(XRD)、热场发射扫描电镜(FE-SEM)及电化学工作站对转化膜层进行表征,探讨了转化温度对转化膜相组成、微观形貌和电化学性能的影响.结果表明,所制备的转化膜呈灰色,由磷酸锌(Zn3(PO4)2·4H2O)及少量的磷酸锌铁(Zn2 Fe(PO4)2·4H2O)组成.随温度的升高,转化膜晶粒趋向于细小均匀、致密.通过电化学分析可知,转化膜的耐蚀性好,且随温度升高转化膜的耐腐蚀性提高.
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