3种有机胺在盐酸溶液中的缓蚀性能对比研究  

Comparative Study on the Inhibition Performance of Three Amines in HCl Solution

作　　者：李晓杰[1] 郭庆行[2] 赵景茂[1,3] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]中海油能源发展股份有限公司工程技术分公司,天津300452 [3]材料电化学过程与技术北京市重点实验室,北京100029

出　　处：《表面技术》2015年第7期103-107,共5页Surface Technology

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。Objective To investigate the inhibition performances of three amines including octadecylamine, unsaturated octadecylamine and N-octadecyl trimetbylene diamine in the 1 moL/L HCI solution and further explore the film-forming property and inhi- bition mechanism of the three organic amines. Methods Static weight-loss method, potentiodynamic polarization, contact angle and AFM force curve measurement were used to investigate the film-forming ability and the film uniformity of these three organic amines on the metal surface. Results The inhibition efficiency of unsaturated octadecylamine, belonging to the cathode type inhibitor, was significantly higher than the other two organic amines. The contact angle measurement showed that the hydropbobicity of the unsaturated octadecylamine film reached the excellent grade, higher than the other two organic amines. Its inhibition mechanism was to form a dense and hydrophobic film on the metal surface so as to prevent the metal from contacting with the corrosive medium. In the adhesion strength test, the measured data distribution of the unsaturated octadecylamine on the metal surface was more uniform, and its standard deviation was the smallest, indicating that its film homogeneity was the best. Additionally, the mean adhesion force of the unsaturated octadecylamine on the metal surface was the highest. Conclusion The unsaturated octadecylamine has the best corrosion performance among the three amines.

关 键 词：有机胺 缓蚀剂 成膜性 盐酸 碳钢 

分 类 号：TG174.42[金属学及工艺—金属表面处理]