How does the screwdriver erase? Do you have the method of restoring magnetism?
The so-called magnetization is to make the magnetic domain of the magnetic domain in the magnetic material become consistent. When the material that does not exhibit magnetism is placed into another strong magnetic field, it is magnetized, but not all materials can be magnetized, and only a few metals and metal compounds can be magnetized.
Method of restoring magnetism:1. use a magnet at the south pole or North Pole to rub along the object in a direction several times.2. on the object around the insulated wire, through the direct current, after a period of time can be removed.3. make objects and magnets attract, after a period of time, the object will be magnetic.
Degaussing: when the magnetized material, influence of external energy, such as heat, impact, the domain which the magnetic moment direction will become inconsistent, magnetism will be weakened or disappeared, this process is called degaussing.
Iron is divided into hard and soft iron and hard iron, iron is easily magnetized and magnetized magnetic iron is not easy to disappear; hardly magnetized screwdriver brothers must be more likely to be magnetized steel. The brother said that after the screwdriver was absorbed by the strong magnet, the magnetism disappeared. I wonder if the strong magnet was still there. If it were still there, you could use it to help the screwdriverComplex magnetism. If it is not the case, I suggest you buy a fade porcelain, but also very practical.You can also search for the magnetic source to magnetize it. Such as magnets, electromagnets...
