Zinc alloy sacrificial anodes are sacrificial anodes for cathodic protection of metal components in electrolytes such as seawater, fresh seawater and soil where the temperature is lower than 50 ° C and the resistivity is less than 15Ω·m, including vessels, harbor facilities, Marine engineering, buried metal pipelines, storage tanks, seawater cooling systems and other steel structures

Zinc sacrificial anodes are mostly used in soil environments with soil resistivity less than 20 ohms · m or seawater environments. The electrode potential is -1.10VCSE and the drive voltage is 0.25V. When the temperature is higher than 49 ° C, intergranular corrosion occurs, and when the electrode potential of the zinc anode is higher than 54 ° C, the polarity of the zinc anode is reversed, and the cathode is protected, while the steel becomes the anode is corroded. Therefore, zinc anodes are generally used at temperatures below 49 ° C. Zinc anodes must be backfilled