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 resonance instrument will also cause the bank card to be magnetized.
1. What is the reason for degaussing the bank card?
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".
Second, how to prevent bank cards from degaussing?
1. At present, the locks of some backpacks and wallets are "hidden buttons" made of magnets, so all kinds of magnetic cards with magnetic stripes should be kept away from such magnets.
2. Do not bend the magnetic card to prevent sharp objects from wearing, scratching or distorting the magnetic stripe. Several magnetic cards are put together and rubbed against each other. Although the magnetic card can't be degaussed, it will damage the magnetic stripe area and the card can't be used again. Therefore, it is best to put the magnetic card in a special card bag or in a protective case.
3. Magnetic cards should not be near high temperature or humid environment. Generally, magnetic cards are made of PVC, which will deform or even burn at high temperature, directly leading to the damage of magnetic strips. If the magnetic card is placed in a humid environment or soaked in water for a long time, it will also cause the card to crack and be damaged, and finally it cannot be used.
4, you can make a small protective bag with aluminum foil for the kitchen (early cigarette cases can also be made with aluminum foil layer, and you will know if the aluminum foil is burned to a corner. ), put an important magnetic card in it, which can block the interference of electromagnetic waves and magnetic fields and protect the magnetic card from degaussing.