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一种新型锈蚀转化剂的作用机理研究

DOI: 10.11903/1002.6495.2014.089, PP. 13-18

Keywords: 锈蚀转化剂,转化过程,转化机理

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Abstract:

采用SEM和AFM技术研究了锈蚀转化涂层形貌的演化过程,利用XPS技术研究了锈蚀转化剂对Fe3+的转化能力,通过能谱分析和红外光谱技术,研究了锈蚀转化剂中的关键组分,从而推断出锈蚀转化剂的反应机理。结果表明,当锈蚀转化剂涂覆在锈蚀层上,其表面发生了一些化学反应。在72h后,锈蚀转化涂层由两相融为均匀相,并且表面粗糙度降低。在此过程中,锈蚀层中Fe3+部分转化为Fe2+。生成的Fe2+和剩余的Fe3+则与锈蚀转化剂中的无机阴离子和单宁酸形成稳定的FePO4,Fe3(PO4)2,Zn3(PO4)2和单宁酸铁络合物构成的保护膜。

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