In this study, a novel inorganic/organic hybrid pigment based on zinc cations/Ferula Asafoetida leaves extract (Zn-FALE) was synthesized, and its corrosion protection properties were investigated in a saline solution and an organic coating. Interactions of components between Zn²⁺ cations and FALE were assessed by thermo-gravimetric analysis (TGA) and ultraviolet-visible (UV–visible) spectroscopy. Corrosion inhibitive performance of FALE and Zn-FALE pigments in the solution phase and coating phase was studied using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). TGA and UV–visible results revealed the proper chelation between inorganic and organic components of Zn-FALE hybrid green pigments. Electrochemical measurement results showed that the addition of 200 mg L⁻¹ FALE and Zn-FALE in the saline solution increased the total impedance of mild steel plates from ~672 to ~8154 and 12,786 Ω cm², respectively, after 24 h immersion. Also, FALE and Zn-FALE showed a mixed-type inhibition mechanism with an efficiency of 67 and 90.2%, respectively. Moreover, EIS results in the coating phase showed that in the presence of 3 wt% of Zn-FALE pigments, the barrier and active corrosion protection performance of epoxy coatings enhanced significantly. The results showed that Zn-FALE pigments have a better performance compared to other extracts reported in the literature.

本研究合成了一种新型的基于锌阳离子/阿魏叶提取物的无机/有机杂化颜料（Zn-FALE），并在盐溶液和有机涂层中研究了其防腐性能。Zn ²⁺之间组分的相互作用通过热重分析（TGA）和紫外可见光谱（UV-visible）评估了阳离子和FALE。使用电位动力学极化和电化学阻抗谱（EIS）研究了FALE和Zn-FALE颜料在溶液相和涂层相中的缓蚀性能。TGA和紫外可见结果表明Zn-FALE杂化绿色颜料的无机和有机成分之间存在适当的螯合。电化学测量结果表明，在盐溶液中添加200 mg L ^-1 FALE和Zn-FALE将低碳钢板的总阻抗从〜672增加到〜8154和12,786Ωcm ²分别浸泡24小时后。此外，FALE和Zn-FALE表现出混合型抑制机制，效率分别为67％和90.2％。此外，在涂层阶段的EIS结果表明，在3％（重量）的Zn-FALE颜料的存在下，环氧涂层的阻隔性和活性腐蚀防护性能显着提高。结果表明，与文献报道的其他提取物相比，Zn-FALE颜料具有更好的性能。