用表面分析的方法研究复合缓蚀剂在天然海水中的缓蚀阻垢-表面技术.PDFVIP

摇 第42卷摇 摇 第3 期摇 摇 2013 年6 月 表面技术 摇 摇 摇 Vol.42摇 No.3摇 Jun.2013 SURFACE TECHNOLOGY 摇摇摇 19 用表面分析的方法研究复合缓蚀剂在天然海水中的缓蚀阻垢机理 柳鑫华,孙彩云,王庆辉,韩婕 (河北联合大学 轻工学院,唐山063000) 摇 摇 [摘摇 要]摇 通过EDS,XPS和SEM分析方法,探讨了海水中,复合缓蚀剂钼酸盐+有机膦酸盐+聚环氧琥珀酸 +锌离子在碳钢表面的缓蚀阻垢协同作用机理。 EDS分析表明,碳钢试片在空白海水中与在添加了缓蚀剂的海水 中相比,表面Fe元素含量由62.68%增加到96.80%,而钙元素含量由34.56%降低到0.10%,说明缓蚀剂减缓了 垢下引起的缝隙腐蚀。 XPS分析表明,添加复合缓蚀剂使得金属表面铁氧化物膜的覆盖率更高,更为致密,而且 试片表面没有发现钙,与EDS 的测试结果一致。 SEM分析表明,添加复合缓蚀剂浸泡后,试片没有腐蚀痕迹和新 试片存在的机械划痕,碳酸钙由浸泡前的稳定方解石变为不稳定的分散状结晶体球霰石。 [关键词]摇 表面分析;缓蚀阻垢机理;协同作用;天然海水 [中图分类号]TG174.42 摇 摇 摇 [文献标识码]A 摇 摇 摇 [文章编号]1001鄄3660(2013)03鄄0019鄄04 Mechanism of Compound Inhibitors in Natural Sea Water with Methods of Surface Analysis LIUXin鄄hua,SUN Cai鄄yun,WANG Qing鄄hui,HAN Jie (College of Light Industry,Hebei United University,Tangshan063000,China) 2+ [Abstract]摇 The synergistic mechanism of inhibitor including molybdate,organic phosphate,PESA andZn on the metal surface was exploredwith methodsof EDS,XPS and SEM. EDS analysisshowedthat Fe contentwasincreasedfrom62.68% to 96.80% and the calcium content was decreased from 34.56% to 0.10% by comparing to the blank seawater specimens with adding inhibitors specimen.So the crevice corrosion under the scale was slowed. XPS analysis showed that compound inhibitor was added so that coverage rate on the metal surface of the iron oxide film was higher and denser and calcium was not found, which was consistent withthetest resultsof theEDS. SEManalysisshowedthattherewasnocorrosiontraceandnomechanical scratch in solution addingcompositeformulations;Crystalsof calciumcarbonatebecamefromthemost stable structureof calcite scale layer to unstable dispersion vaterite. [Key words]摇