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Two magnets for magnetic CARDS disappear?

by:Maghard      2020-09-25
Two magnets for magnetic CARDS disappear? Reporter first with a magnet, on bus IC card, bank card, smart card, HID card rub brush 50 times respectively, result these CARDS and, therefore, is no demagnetization. Reporter then added a magnet, with two magnet respectively on the same experiment was conducted on both sides of the above four CARDS. As a result, the bus IC card, smart card and HID card, and, therefore, is no demagnetization. However, when the reporter will deal with bank card into an ATM machine, an accident! I saw the green light on the ATM kept flashing, then an alarm sound. A big exclamation mark is shown on the screen: 'the card is invalid, please retrieve the card. 'in an exclamation point out after 2 seconds, bank card out automatically by a machine. Reporter tried to this piece of bank card into the ATM several times, but the CARDS were machine spit it out. After replaced a ATM machine, card is still out. This shows that bank card in under the action of two magnets, have 'degaussing. Magnet manufacturers test conclusion: strong magnet can indeed make with a magnetic stripe card degaussing, but for other three types of CARDS and have no effect. Nd magnet with the increase of temperature, Nd magnet coercive force will be greatly reduced, so the heat type by adding dysprosium ( Dy) To prevent the coercive force. In fact, heat-resistant type Nd magnet has been used for hybrid electric vehicles ( HEV) And pure electric vehicles ( EV) Such as driving motor for the electric car motor, air-conditioning compressor, and industry. However, heat-resistant type Nd magnet has the problem of raw material supply is not stable. Because Dy origin concentrated in China, the supply will significantly change with China's export policy. Even if China reopened shipments to Japan now, Dy the transaction price is up to more than $1000 per kilogram. Magnet company is the specialized production ( Ndfeb) Powerful magnet company, has factories in dongguan city based wangniudun pier town. Magnet products used in toys, jewelry, crafts gifts, handmade gift box, leather handbags invisible magnetic button, plastic hardware products, audio equipment and other industries. Our company is located in dongguan city based wangniudun block cao beijiao town five chung village industrial zone, the company can provide customers 24 hours delivery, 36 hours to the customers specifications template. Magnet experts will find magnet products co. , LTD. , dongguan city, pack your satisfaction, more information you can view our company website/magnet. This article rigorous reproduced, if there are any violation, the consequence is proud! Dongguan magnet products co. , LTD. , tel: 0769 - 81313183 guangdong ICP for 16113157 magnets, magnet, profiled magnets, magnet factory, dongguan magnet products co. , LTD
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