It is demonstrated that the oxides and corrosion product layers not only endured the attack from aggressive environments, but also provided an additional photogenerated cathode protection to electrogalvanized steel in simulated seawater under simulated sunlight illumination. The corrosion product layer, which is composed of ZnO, Zn(OH)₂, Zn₂(OH)₂CO₃ and Zn₅(OH)₈Cl₂·H₂O provided approximately 30% better corrosion protection to zinc coating under sunlight illumination than the situation in darkness according to the Stern−Geary resistance results. The responsible mechanism is due to the fact that the ZnO layer could produce photoelectrons which are transferred directly to the substrate, thereby providing a cathodic protection to electrogalvanized steel under sunlight illumination.

结果表明，氧化物和腐蚀产物层不仅能承受侵蚀性环境的侵蚀，而且还能在模拟海水和模拟阳光照射下，为电镀锌钢提供额外的光生阴极保护。腐蚀产物层，由ZnO，Zn（OH）₂，Zn ₂（OH）₂ CO ₃和Zn ₅（OH）₈ Cl ₂ ·H _2组成根据耐斯特恩-基里的结果，O在阳光照射下比在黑暗中对锌涂层的腐蚀防护效果要好约30％。负责任的机制是由于ZnO层可以产生直接转移到基材上的光电子，从而在日光照射下对电镀锌钢提供阴极保护。