The bank card magnetic strip used is originally a magnetized item. Since it can be magnetized, it can also be demagnetized. Secondly, the principle of degaussing is to apply a magnetic field that changes in strength. Then wherever there is electricity, there is basically a magnetic field. Electromagnetism appears at the same time, so the bank card is degaussed because it is close to the changing electric field or magnetic field.

If the bank card is mechanically deformed or beaten for a long time, it will also lose magnetism. The principle is that the internally arranged molecules are mechanically changed by external force to change the order of the molecules, resulting in loss of magnetism.

It is not recoverable and can only be replaced. Degaussed credit cards will actually only appear in magnetic stripe cards. Magnetic stripe cards are cards that use magnetic carriers to record character and numerical information. The main disadvantage is that it is easily interfered by other magnetic fields, becomes invalid after repeated use, or is scratched by hard objects such as keys and cannot be read. Therefore, if possible, it is better to replace it with an IC card in time, which is safe and reliable.

Extended information:

Notes:

1. It is best to put the bank card in a hard-covered wallet and not too close to the magnetic buckle. .

2. Never throw it away in a messy bag to prevent sharp objects from wearing, scratching or twisting the magnetic strip.

3. It is best not to store multiple bank cards close together, let alone place two bank cards back to back so that the magnetic strips rub or collide with each other.

4. Try to stay away from high magnetic fields around induction cookers, microwave ovens, TVs, refrigerators and other electrical appliances, and try not to put them together with mobile phones, computers, magnets and other magnetic objects.

Baidu Encyclopedia-Credit Card

Baidu Encyclopedia-Degaussing