Not suitable.
It is normal for there to be too much scale and block the water outlet. Don't believe the propaganda of some manufacturers about automatic descaling. In fact, the magnesium rod in the electric water heater is not used for descaling, but to replace the corroded inner tank.
If you must install it, you must descale it regularly.
The method of descaling is to use descaling agent.
The descaling agent can dissolve scale components such as calcium carbonate, magnesium carbonate, calcium sulfate, calcium silicate and iron oxide; it is non-corrosive to metals, non-toxic, and can quickly and completely remove scale attached to the inner wall of the boiler.
After the water heater heats the water, part of the water evaporates, and the originally insoluble calcium sulfate (CaSO4, gypsum is calcium sulfate containing crystal water) precipitates. The originally dissolved calcium bicarbonate (Ca(HCO3)2) and magnesium bicarbonate (Mg(HCO3)2) decompose in heated water, releasing carbon dioxide (CO2) and turning into insoluble calcium carbonate (CaCO3) and hydrogen Magnesium oxide (Mg(OH)2) also precipitates, and sometimes MgCO3 is generated, thus forming scale. According to the different reasons for its formation and forming state, it can be roughly divided into two types: hard scale and soft scale. The main components of scale are calcium carbonate and magnesium hydroxide. They can undergo chemical changes with acids, which means that scale can be removed with acid-containing chemicals. This compound agent is a descaling agent.
1. Use chemicals for descaling according to the specific operating conditions. Organic acid cleaning agents are made by organically mixing the main cleaning agent and high-efficiency corrosion inhibitors; there is no need to add other additives during use. Simplifies and facilitates installation and operation at the cleaning site. [1]
2. The slow-release scale inhibitor has fast cleaning speed and high corrosion inhibition efficiency. The cleaning waste liquid treatment method is simple, which is beneficial to the pre-film after cleaning.
3. The use of scale inhibitors can effectively inhibit the galvanic corrosion of copper pipes and copper alloy and carbon steel composite parts during the pickling process; it has strong resistance to corrosion accelerated by Fe3 and Cu2.
4. The use of scale inhibitors is a guarantee for the safety of equipment; it can easily and completely remove scale and reduce the corrosion rate; it is simple to operate, safe and reliable; generally used scale inhibitors The agent does not contain toxic or harmful substances and can be discharged after simple neutralization. It is safe and environmentally friendly.
5. Using scale inhibitors to maintain performance can reduce labor intensity, facilitate users' direct use and regular cleaning and maintenance, and save equipment maintenance expenses.
6. During the cleaning process, H will corrode the metal body and cause hydrogen embrittlement; and the oxidizing ions such as Fe3 and Cu2 produced by dissolution will cause pitting corrosion, copper plating and other phenomena of the metal body. , so corresponding corrosion and scale inhibitors should be added to the cleaning agent;
7. Internal pickling cannot remove various types of insoluble scale and scale inhibitors can completely remove even the most stubborn sulfuric acid. Salt water scale also still provides excellent cleaning results.
8. Good water treatment agents can complete cleaning under neutral or weakly alkaline (pH 7 to 12) conditions, and will not cause corrosion damage to metals; even long-term use will not cause damage to metals. Adversely affects the mechanical performance and service life of the equipment.
9. The equipment can also be cleaned with water treatment chemicals during normal operation. Since it does not affect production, there is no loss of production shutdown.
10. The operation method of using high-efficiency water treatment chemicals is simple and easy to understand, and anyone can complete it.