The effect of substrate micro-galvanic corrosion on the curing of an epoxy coating was investigated through analyzing the potentiodynamic polarization curves, electrochemical impedance spectra and galvanic current densities of metallic substrates with various galvanic cells exposed in epoxy, curing agent and their mixture. This corrosion of the substrate during curing proved to be able to significantly influence both the adhesion and permeability of the cured coating. The finding was further interpreted by electrochemical reactions of the substrate metal with water absorbed in the curing agent.

中文翻译：

---

环氧涂层形成过程中的微电偶腐蚀

通过分析暴露在环氧树脂、固化剂及其混合物中的各种原电池的金属基材的动电位极化曲线、电化学阻抗谱和原电池电流密度，研究了基材微电偶腐蚀对环氧树脂涂层固化的影响。事实证明，固化过程中基材的这种腐蚀能够显着影响固化涂层的附着力和渗透性。通过基材金属与固化剂中吸收的水的电化学反应进一步解释了这一发现。