摘要
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。
The synergistic mechanism of inhibitor including molybdate,organic phosphate,PESA and Zn2＋on the metal surface was explored with methods of EDS,XPS and SEM.EDS analysis showed that Fe content was increased from 62.68% 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 with the test results of the EDS.SEM analysis showed that there was no corrosion trace and no mechanical scratch in solution adding composite formulations;Crystals of calcium carbonate became from the most stable structure of calcite scale layer to unstable dispersion vaterite.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2013年第3期19-22,共4页
Surface Technology
基金
河北省科技局科技攻关项目(06213027)
关键词
表面分析
缓蚀阻垢机理
协同作用
天然海水
surface analysis
corrosion and scale mechanism
synergy
natural seawater
