Chitosan (Chit) coatings were applied on zinc substrates by the dip-coating method. Subsequently, the coatings were impregnated with a corrosion inhibitor, 2-Acetylamino-5-mercapto-1,3,4-thiadiazole (AcAMT) to obtain an increased anticorrosive effect. The coating thickness and the AcAMT accumulation were determined using UV-Vis spectroscopy on glass and quartz substrates, respectively. The surface morphology and coverage were investigated with atomic force microscopy. Electrochemical impedance spectroscopy and potentiodynamic polarization techniques were used to investigate the protective properties of the impregnated coatings. The chitosan coatings facilitated the accumulation of the corrosion inhibitor inside the polymeric matrix (a multiplication of 380 times compared to the impregnating solution concentration was calculated), channeling high amounts of AcAMT to the Zn surface, which resulted in an inhibition efficiency of >90%. This effect demonstrates the applicability of chitosan coatings as carriers for corrosion inhibitors, significantly reducing the amount of inhibitor needed to achieve good anticorrosive effects.

中文翻译：

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壳聚糖涂层中2-乙酰氨基-5-巯基-1,3,4-噻二唑的积累可改善对锌的防腐效果。

通过浸涂法将壳聚糖（Chit）涂料涂在锌基底上。随后，用腐蚀抑制剂2-乙酰胺基-5-巯基-1,3,4-噻二唑（AcAMT）浸渍涂料，以提高防腐效果。分别使用玻璃和石英基板上的UV-Vis光谱法确定涂层厚度和AcAMT累积量。用原子力显微镜研究了表面形态和覆盖率。电化学阻抗谱和电位动力学极化技术被用来研究浸渍涂层的保护性能。壳聚糖涂层促进了缓蚀剂在聚合物基体内的积累（计算出与浸渍溶液浓度相比，乘以380倍），将大量的AcAMT引导到Zn表面，导致抑制效率> 90％。这种效果证明了壳聚糖涂料作为缓蚀剂载体的适用性，显着减少了达到良好防腐蚀效果所需的缓蚀剂的量。