Improvement of Potential Stability of Zinc Reference Electrode Immersed in Seawater by Anodizing Treatment

The zinc immersed in seawater was anodized by galvanostatic polarization. The potential of electrode immersed in seawater was measured in different environments. The results were compared with those of the unanodized zinc electrode. The results showed that changes of the potential of anodized zinc electrode were not remarkable. The anodic film was studied with scanning electron microscopy (SEM) and X-ray diffraction (XRD) and that the main corrosion products of zinc are Zn(OH)2 and ZnO.