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. Impressively, 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.

中文翻译：

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金属-有机骨架控制多取代三唑的释放，有效抑制低碳钢在中性氯化物溶液中的腐蚀

摘要 开发了一种含有多个活性基团的三唑基化合物和有前景的金属有机骨架控释策略，用于在 0.5 M NaCl 溶液中缓蚀低碳钢。电化学分析表明抑制剂通过形成保护膜有效抑制阳极和阴极反应，在 5.5 × 10−4 M 的最佳浓度下效率达到 98% 左右。令人印象深刻的是，MOF 颗粒上的抑制剂负载导致减少最佳用量为 4 倍。负载抑制剂的等效浓度小于 1.3 × 10-4 M。电化学石英晶体微量天平测量和表面表征的结果表明控释通过引起致密化大大增强了抑制能力的保护膜。