【作者】 卢嘉星； 冯锦华； 田惠文； 曹文凯； 李伟华；

【机构】 中山大学化学工程与技术学院； 中国科学院海洋研究所；

【摘要】 一种包含多种活性基团且由金属有机框架（MOF）结构控制释放的三唑类化合物被用作在0.5M的NaCl溶液中的缓蚀剂。电化学分析表明缓蚀剂有效降低了碳钢电极的腐蚀速度,在最佳掺量5.5×10^-4 M时,缓蚀效率可高达98%。加载至MOF颗粒中的缓蚀剂的等效掺量减少了4倍,缓蚀剂的等效浓度是1.3×10^-4 M左右。电化学旋转微晶天平和表面形貌分析表明控制释放大大提升了保护膜的致密性。结合光谱分析为缓蚀剂和MOF的相互作用以及膜形成机理提供了直接证明。更多还原

【Abstract】 A triazole-based compound containing multiple active groups and promising strategy of controlled delivery by metal-organic framework were developed for corrosion inhibition of mild steel in 0.5 M NaCl solution. Electrochemical analysis showed the inhibitor effectively suppressed both the anodic and cathodic reactions by forming an protective film, achieving the efficiency around 98% at an optimal concentration of 5.5 × 10^-4 M. The inhibitor loading onto MOF particles leads to a reduction of optimal dosage by a factor of 4. The equivalent concentration of the loaded inhibitor is less than 1.3 × 10^-4 M. The results of electrochemical quartz crystal microbalance measurement and surface characterization indicated the controlled delivery largely enhances the inhibition ability by giving rise to densification of protective film. Combined spectroscopic analysis provided direct evidences for the inhibitor-MOF interaction and film formation mechanism.更多还原