Corrosion preventing structure with two anodes used in cooperation in inner container of water heater

Abstract

The invention discloses a corrosion preventing structure with two anodes used in cooperation in an inner container of a water heater. The corrosion preventing structure comprises the electronic anodes, a power source, the metal inner container and a heating pipe. The electronic anodes are further connected with a positive electrode of the power source, the metal inner container serves as a cathode, and the metal inner container is connected with a negative electrode of the power source. The electronic anodes, the heating pipe and the metal inner container are fixedly connected in an insulated manner. A titanium electrode and a graphite electrode are in conductive connection to serve as the electronic anodes. The graphite electrode is added to the anodes, and is used in cooperation with the titanium electrode, so that on the one hand, the conductive area of the anodes is increased, protection currents are increased, and the situation that tiny crack protection is not in place is relieved; and on the other hand, the activity of the titanium electrode is higher, the consumption speed of the graphite electrode in the use process is greatly reduced, meanwhile, the titanium electrode can protect the graphite electrode, and the titanium electrode and the graphite electrode supplement each other.

Description

technical field [0001] The invention relates to a water heater inner tank structure, in particular to an anti-corrosion structure in which two anodes are used together in the water heater inner tank. Background technique [0002] In order to prevent the inner tank of the water heater from being corroded, the current industry mainly adopts the method of installing metal magnesium rods. Due to the high activity of magnesium metal, corrosive ions (headed by chloride ions) in water will be attracted, and the magnesium will be corroded first. Metal, thus protecting the metal liner. But the consumption of magnesium rods is fast, and it will be exhausted in less than half a year under the condition of poor water quality, and there are side effects. The magnesium ions generated during the consumption of magnesium rods combine with the hydroxide ions generated at high temperature near the heating tube to form magnesium hydroxide structure Scale is on the heating tube. [0003] At p...

AI Technical Summary

Problems solved by technology

But the consumption of magnesium rods is fast, and it will be exhausted in less than half a year under the condition of poor water quality, and there are side effects. The magnesium ions generated during the consumption of magnesium rods combine with the hydroxide ions generated at high temperature near the heating tube to form magnesium hydroxide structure Dirt on the heating pipe

[0003] At present, cathodic protection technology is also used, which not only uses titanium electrodes as anodes to absorb chloride ions for protection, but this technology still has defects. In the enamel liner, the water temperature is low, and the conductivity and protection current are not enough when the water quality is good. , the protection against tiny cracks in the enamel liner is not in place

Large protection voltage and large protection current can easily cause electrolysis, resulting in hydrogenation of the liner, and even chlorine and oxygen, which will aggravate adverse effects such as corrosion of the liner after power failure

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