Recently, interest in developing green polymer coatings which provide self-healing and corrosion protection functions using bio-based renewable materials has significantly increased. In this study, microcapsules containing biopolymers from cashew gum and gum Arabic have been prepared by interfacial polymerization. The prepared microcapsules were individually and combinatorially embedded into epoxy coatings and the resulting composite coatings were then applied on Q235 steel substrates. The performance of the composite coatings was evaluated by immersing both scribed and unscribed coatings in simulated seawater. Surface analytical (SEM), physico-chemical (FTIR, XRD, XPS), and electrochemical impedance spectroscopy (EIS) techniques were used to investigate self-healing and corrosion resistance effectiveness of the polymer composite coatings. The obtained results revealed that cashew gum and gum Arabic could heal the scribed coating surface and subsequently suppressed corrosion reaction, without the aid of any catalyst or co-reactant. The performance was observed to be higher when the two gum exudates were combined. Thus, cashew gum and gum Arabic have demonstrated that they possess properties required for potential utilization in the formulation of marine anticorrosion and self-healing epoxy coatings.

近来，对开发使用生物基可再生材料提供自我修复和腐蚀保护功能的绿色聚合物涂料的兴趣大大增加。在这项研究中，通过界面聚合制备了包含来自腰果胶和阿拉伯胶的生物聚合物的微胶囊。将制备的微胶囊分别和组合地包埋在环氧涂层中，然后将所得的复合涂层涂覆在Q235钢基底上。通过将划线和未划线涂层都浸入模拟海水中来评估复合涂层的性能。使用表面分析（SEM），物理化学（FTIR，XRD，XPS）和电化学阻抗谱（EIS）技术研究了聚合物复合涂层的自修复和耐腐蚀性能。所获得的结果表明，腰果胶和阿拉伯树胶可以在不使用任何催化剂或助反应剂的情况下治愈划痕的涂层表面并随后抑制腐蚀反应。当将两种树胶渗出物组合时，观察到性能更高。因此，腰果树胶和阿拉伯树胶已证明它们具有在船用防腐蚀和自修复环氧涂料配方中潜在利用的特性。