疏水性三嗪硫醇类分子膜的制备与表征

Preparation and Characterization of Hydrophobic Triazine-dithiol Molecular Film

采用有机镀膜方法在低碳钢表面成功制备了疏水性三嗪硫醇类分子膜。通过循环伏安曲线分析了低碳钢表面有机镀膜的成膜过程,利用蒸馏水接触角和动电位极化曲线对所镀膜层的润湿性和耐腐蚀性能进行了表征。结果表明:低碳钢表面有机镀膜成膜过程同时存在3个反应,即基体与有机单体之间的电化学反应、金属有机化合物和有机单体之间的聚合反应及有机单体之间的聚合反应;有机镀膜后低碳钢表面蒸馏水静态接触角由基体的65.5°增大到96.3°,实现了由亲水到疏水特性转变;腐蚀电流从14.80μA/cm2降低到0.53μA/cm2,耐腐蚀性能得到显著提高。

The hydrophobic triazine-mercaptan molecular film was prepared on the surface of low-carbon steel by developed method of polymer plating. The process of polymer plating was researched with cyclic voltammetry. The contact angle of distilled water and potentiodynamic polarization were used to characterize the wettability and corrosion resistance of polymer-plated film. The experimental results indicate that there are 3 reactions occurring simultaneously during the process of polymer plating on low-carbon steel surface, which are electrochemical reaction takes place between substrate and polymeric monomers, organometallic compounds couple with the polymeric monomers and the polymeric monomers couple with each other. The static contact angle of distilled water on the polymer-plated surface increases to 96.3° while the contact angle of blank is 65.5°, which indicates that the wettability of substrate is modified from hydrophilic to hydropho- bic. The corrosion current density of polymer-plated steel decreases to 0.53 μA/cm2 compared with 14.80 μA/cm2 for blank, therefore the anti-corrosion property is efficiently improved for low carbon steel.