3种有机胺在盐酸溶液中的缓蚀性能对比研究

发布时间：2018-07-27 21:20

【摘要】：目的研究十八胺、不饱和十八胺,N-十八烷基丙撑二胺等3种有机胺在1 mol/L的盐酸溶液中的缓蚀性能,探讨3种有机胺在金属表面的成膜性及其缓蚀机理。方法采用静态挂片质量损失法、动电位极化曲线测试、接触角测试及AFM力曲线测试研究3种有机胺在碳钢表面的成膜性及膜的均匀性。结果不饱和十八胺的缓蚀率明显高于另外两种,为阴极抑制型缓蚀剂。接触角测试表明,不饱和十八胺的疏水性达到了优等级,高于另外两种有机胺;其缓蚀机理为在金属表面形成一层致密的疏水性保护膜,有效隔离了金属与腐蚀介质的接触。在粘附力测试实验中,不饱和十八胺在金属表面测量数据分布较为平均,其标准偏差最小,说明这种胺在金属表面成膜最好。另外,不饱和十八胺在金属表面的平均粘附力最大。结论不饱和十八胺具有最好的缓蚀性能。
[Abstract]:Objective to study the corrosion inhibition of octadecylamine and unsaturated octadecylamine N-octadecyl propylenediamine in 1 mol/L hydrochloric acid solution. Methods the film formation and homogeneity of three kinds of organic amines on carbon steel surface were studied by means of static hanging plate mass loss method, potentiodynamic polarization curve test, contact angle test and AFM force curve test. Results the inhibition rate of unsaturated octadecylamine was significantly higher than that of the other two, and it was a cathodic inhibitor. The contact angle test shows that the hydrophobicity of unsaturated octadecylamine is superior to that of the other two organic amines, and its corrosion inhibition mechanism is to form a dense hydrophobic protective film on the surface of the metal, effectively isolating the contact between the metal and the corrosion medium. In the adhesion test, the data distribution of unsaturated octadecylamine on metal surface is average, and its standard deviation is the least, which indicates that this amine is the best in forming film on metal surface. In addition, the average adhesion of unsaturated octadecylamine on metal surface is the highest. Conclusion unsaturated octadecylamine has the best corrosion inhibition.
【作者单位】：北京化工大学材料科学与工程学院;中海油能源发展股份有限公司工程技术分公司;材料电化学过程与技术北京市重点实验室;
【分类号】：TG174.42

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