碳钢用双吗啉甲基脲基复配气相缓蚀剂及其缓蚀性能

Bis-morpholiumomethyl-urea Compound Vapor Corrosion Inhibitor and Its Corrosion Inhibition Performance for Carbon Steel

目的 制备一种用于碳钢保护的绿色高效复配气相缓蚀剂。方法 以双吗啉甲基脲、尿素、十二烷基磺酸钠为三因素,采用45#钢为研究对象,通过极化曲线和电化学阻抗实验确定三水平,设计L9(33)正交实验,筛选出最优配方并制成气相防锈纸,采用X射线光电子能谱和接触角测量研究复方VCI在碳钢表面的吸附情况。结果 筛选出了最佳的三元配方:3 g/L双吗啉甲基脲+2 g/L尿素+0.25 g/L十二烷基磺酸钠;以此为基础制成防锈纸,其挂片实验的缓蚀效率高达94.05%。经该防锈纸防护的金属表面接触角与被原纸保护的金属表面接触角相比增大了约11°,呈现出更高的疏水性。结论 以最优气相缓蚀剂配方为基础制成的气相防锈纸具有明显的气相防锈保护作用。

The work aims to prepare a green and efficient compound vapor corrosion inhibitor for protection of carbon steel.45#steel was used as the experimental object,and bis-morpholiumomethyl-urea,urea,and sodium dodecyl sulfonate were used as the compound components.Through polarization curve and electrochemical impedance experiment,three levels were determined and L9(33)orthogonal experiment was designed,and the best formula was screened,according to which the vapor antirust paper was made.Then,the adsorption of compound VCI on carbon steel surface was studied by X-ray photoelectron spectroscopy and contact angle measurement.The best ternary formula was selected:3 g/L bis-morpholiumomethyl-urea+2 g/L urea+0.25 g/L sodium lauryl sulfonate.Based on this,the antirust paper was made,and its corrosion inhibition efficiency was as high as 94.05%.The contact angle of the metal surface protected by the antirust paper increased by about 11°compared with that of the metal surface protected by the base paper,showing higher hydrophobicity.The vapor antirust paper based on the optimal vapor corrosion inhibitor formula has obvious vapor antirust protection.