| High purity zinc reference electrode is the only electrode that can be used in both seawater and soil. Because of this character, it is widely used in the engineering practice. Also with the development of the metallurgy, the purity of zinc is becoming higher and higher. The zinc with the purity of 99.9953%( which called no.1 zinc) and the zinc with the purity of 99.9999%( which called no.2 zinc) were chosen as the research object. Based on the objects, the inter-effect of concentration of Cl-, temperature and anodic polarization current on the potential stability of high purity zinc reference electrode was investigated by the method of electrochemistry. And the effect of the temperature, the oxygenic pressure and the anodic polarization current on the electricity of the electrode in the hole-fluid of the soil was researched too. As well as the analysis of the components of corrosion products and their configurations while under the real soil by X-ray diffraction instrument and the electronic scanner.The research result shows that, the corrosion products of the zinc in seawater are ZnO,Zn(OH)2,6Zn(OH)2·ZnCl2 and 4Zn(OH)2·ZnCl2. While the seawater temperature was 25℃, and the anodic polarization current was lower than 5μA/cm2, the two high purity zinc exhibited high performance of current-load ability. But While the seawater temperature was between 0℃ and 25℃, the anodic polarization current was lower than 5μA/cm2, the no.2 high purity zinc exhibited high performance of current-load ability. In the different fluid with four kinds of Cl- purity, the anti anodic polarization current of the no.2 zinc was 3μA/cm2. Also, the higher the speed of the seawater, the better the stability of the electricity is.
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