| Method | Description | Disadvantages |
|---|---|---|
| Magnetic type | Passes water through the middle of a magnetic field to prevent molecular bonding of Ca ++, Mg ++, and ions, and prevents soluble substances from adhering to the pipe wall | Unlike the theory, it does not cause any significant effect - the issue of the magnet’s persistency, - cannot be used in large pipes. |
| Epoxy coating | Epoxy coating on the inner surface of pipes to prevent water and oxygen bonding, in turn preventing corrosion | Secondary pollution caused by coating peeling, - Chemical products, - Formation of scale on the coating film, - Corrosion after coating peeling |
| Ultrasonic type | Remove scale by causing fine vibration continuously with ultrasonic waves caused by an ultrasonic vibrator | Can be used only in a limited range of ultrasonic waves |
| Chemical treatment method | Chromate, phosphate, silicate, etc. are injected into the aqueous solution to form a coating on the metal, in turn preventing corrosion by blocking dissolved oxygen | Environmental pollution, - Continuous administration of chemicals, - Not able to maintain a constant rate of solubility |
| Ion method | By attaching a metal with stronger oxidizing power than iron, blocking oxygen in advance, in turn suppressing the occurrence of rust, and removing scale | Its effect varies on the potential and pH of water, - High price,-Pipe cutting problem during installation, - cannot be used on large pipes |
| Induction coil method | A method of accelerating and draining CaCO3 bonds in water using an electromagnetic field (Lorentzforce), and removing the existing scale by CO2 | [Disadvantages] Continuous electricity supply required [Advantages] |
|
Magnetic type Passes water through the middle of a magnetic field to prevent molecular bonding of Ca ++, Mg ++, and ions, and prevents soluble substances from adhering to the pipe wall [Disadvantages] Unlike the theory, it does not cause any significant effect |
|
Epoxy coating Epoxy coating on the inner surface of pipes to prevent water and oxygen bonding, in turn preventing corrosion [Disadvantages] Secondary pollution caused by coating peeling, |
|
Ultrasonic type Remove scale by causing fine vibration continuously with ultrasonic waves caused by an ultrasonic vibrator [Disadvantages] Can be used only in a limited range of ultrasonic waves |
|
Chemical treatment method Chromate, phosphate, silicate, etc. are injected into the aqueous solution to form a coating on the metal, in turn preventing corrosion by blocking dissolved oxygen [Disadvantages] Environmental pollution, |
|
Ion method By attaching a metal with stronger oxidizing power than iron, blocking oxygen in advance, in turn suppressing the occurrence of rust, and removing scale [Disadvantages] Its effect varies on the potential and pH of water, |
|
Induction coil method A method of accelerating and draining CaCO3 bonds in water using an electromagnetic field (Lorentzforce), and removing the existing scale by CO2 [Disadvantages] Continuous electricity supply required [Advantages] - Completion of its performance verification in national projects (Korea Water Resources Corporation, Korea District Heating Corporation), |
