Magnesium anode rod for water heater

Jun 09, 2022

Introduction of magnesium anode rod for water heater
Magnesium rod is the common name of magnesium anode, also known as anode magnesium rod, which is used to prevent the corrosion of the metal liner of the water heater and soften the water quality. That is, the magnesium rod is used as the anode, the metal liner is used as the cathode, and the water in the liner is used as the dielectric to form a primary battery.

By sacrificing the magnesium anode rod, the more important role of the cathode of the metal liner is protected. Water heaters usually use titanium steel or manganese steel metal liner, and then coat the inner surface of the metal with enamel. When the enamel coating on the surface of the metal liner is complete, the insulation performance between the magnesium rod and the metal liner is very good, and the insulation resistance reaches Above 3M ohms. However, when there is a local crack in the enamel liner, a resistance is formed between the magnesium anode and the metal liner through water, and the magnesium anode begins to output current, which flows to the exposed metal liner to generate a polarizing film, repairs the damaged enamel, and makes the metal is insulated to prevent corrosion.



Replacement of magnesium anode rod for water heater
Because the magnesium rod is in the water for a long time, and it is used for a long time with electricity, the magnesium rod will be continuously dissolved in the water, and finally become a sponge rod, and the weight will be reduced. When the weight is reduced to one-third of the original weight, the magnesium rod should be replaced. Magnesium rods can generally be used for about a year, and are wearing parts, which have no effect on the use of electric water heaters and are not important parts. Of course, the regular maintenance of electric water heaters is a must, and the inspection of magnesium rods is essential and should be tested once a year.

Application of magnesium anode rod
Main uses of magnesium anode rods: Mainly used for metal protection in water heaters, refrigerators, storage tanks, high temperature boilers, ground electrodes for preventing high-voltage interference, and also used in soil to protect metal pipelines for natural gas transportation. Applicable medium: fresh water and soil with high resistivity. Magnesium anode rod has the function of neutralizing and eliminating chemical substances in water, preventing the formation of scale, which can improve the corrosion resistance of the water heater and prolong the trouble-free life of the water heater.

Specification of magnesium anode rod for water heater