Thermosetting two-position two-way large-diameter solenoid coil AB410A

Causes of corrosion of solenoid valve coil

1.The solenoid valve coil terminals are all flooded due to poor sealing, and the corrosion of the terminals is all on the positive electrode, while the negative electrode is intact.

2.It can be concluded that poor sealing of solenoid valve coil and water inflow are the primary causes of terminal corrosion. However, because of the bad working conditions on site, the impact of coal on the coil is inevitable, so it is impossible to ensure that there is no water at the coil terminal.

3.Because of the existence of water at the terminal and the salt in the water, it acts as an electrolyte;

4.Therefore, the galvanic cell response is presented.

5.As for the negative electrode, all electrons flow to the negative electrode in the process of energizing the coil, and the corrosion current on the surface of the negative electrode terminal drops to zero or close to zero, thus inhibiting the effect of the terminal losing electrons and then avoiding the corrosion of the terminal.

6.This is the so-called impressed current cathodic protection.

7.As for the positive electrode, the situation is the opposite, and it has become a dedicated anode in the Cathodic Protection Law for Dedicated Anodes.

8.Therefore, even copper, whose chemical properties are not vivid, is quickly corroded, and the terminals are cracked, resulting in failure and shutdown.

What is the relationship between the size of magnetic force of solenoid valve coil and:

The size of the magnetic force of the solenoid valve coil is related to the wire diameter and number of turns of the coil and the magnetic conductivity area of the magnetic steel, that is, the magnetic flux. The DC electromagnetic coil can be pulled off the iron core; If the communication fails, the communication coil will be unplugged from the iron core, which will lead to the surge of coil current and burn the coil. There is a short-circuit ring inside the communication coil iron core to reduce oscillation, and there is no need for a short-circuit ring inside the DC coil iron core.