The recorded information of bank cards and bankbooks are stored on the magnetic stripe on the back. The strong magnetic field generated by high-frequency electromagnetic waves generated when the mobile phone works will magnetize the credit card, making the recorded information disordered, thus leading to the invalidation of the bank card. At the same time, some citizens put mobile phones, bank cards and other items together in their bags, which can easily lead to the bank cards being "degaussed".
In addition, if the magnetic strips of two bank cards overlap, they are likely to be demagnetized at the same time. In addition, some medical inspection equipment such as the magnetic hidden buckle of the lady's handbag and the nuclear magnetic vibrator will also cause the bank card to be magnetized.
The most common magnetic cards in life are bank cards and shopping cards. These cards are embedded with magnetic strips to store information. When the magnetic stripe touches an object with strong magnetic field, the information stored in the magnetic stripe will be destroyed and "disordered", which is also commonly known as "degaussing".
The ways to prevent magnetic cards from degaussing are: stay away from the high magnetic fields around induction cookers, microwave ovens, televisions, refrigerators and other electrical appliances, and try not to put them with magnetic objects such as mobile phones, computers, palmtop computers, magnets, music stars, business contacts or possibly magnetic metals, and don't throw magnetic cards in messy bags at will to prevent them from being worn, scratched, twisted or broken by sharp tools.
Extended data:
Degaussing solutions and preventive methods:
1. Generally, after degaussing, you need to bring your own bank card, ID card and other related documents to the bank for re-processing. If you need a new number, you can get it on the spot. If you want the previous bank account number, it may take several days.
2. If it is a bus card, you can take the bus card to the bus recharge center and ask the relevant staff to magnetize the bus card. But in this case, the money in the bus card may be gone before.
3. No matter what card it is, try not to put it with mobile phones, keys and other items in daily life. If you put it with items such as mobile phone keys for a long time, the card will definitely be demagnetized.
4. You can buy card sets, special cards and special sets in your daily life, which can also prevent the card from degaussing to some extent.
Baidu encyclopedia-degaussing