The magnet is already an oxide and will not oxidize in water or change its internal structure.
A magnet is an object that attracts iron and generates a magnetic field outside of it. Magnets in the narrow sense refer to magnetite products, and magnets in the broad sense refer to objects or devices used to generate magnetic fields. Magnets act as magnetic dipoles and can attract ferromagnetic materials, such as metals like iron, nickel and cobalt. [1] The magnetic pole is determined by hanging a magnet with a thin wire. The magnetic pole pointing north is called the north pole or N pole, and the magnetic pole pointing south is called the south pole or S pole. (If you think of the Earth as a large magnet, the current magnetic north pole of the Earth is the S pole and the geomagnetic south pole is the N pole.) Magnets with different poles attract each other et magnets with the same pole repel. The south pole and the north pole attract each other, the south pole and the south pole repel each other, and the north pole and the north pole repel each other.
The magnet[1] is made of ferric oxide powder as well as fillers and adhesives. Some magnets have strong magnetism and contain more Fe3O4, while others have very weak magnetism and contain less Fe3O4. Most matter is made up of molecules, which are made up of atoms, and atoms are made up of nuclei and electrons. Inside an atom, electrons are constantly spinning and circling around the nucleus. The two movements of the electrons produce magnetism. But in most materials, electrons move in different, chaotic directions, and the magnetic effects cancel each other out. Therefore, most substances are not magnetic under normal circumstances.
Ferromagnetic substancess such as iron, cobalt, nickel or ferrite are different. The electronic spins inside them can spontaneously organize within a small range to form a spontaneous magnetization zone. The magnetized area is called a magnetic zone. domain. After the ferromagnetic substances are magnetized, the internal magnetic domains are arranged neatly and in the same direction, which strengthens the magnetism and forms a magnet. The process of attraction of iron by the magnet is the process of magnetization of the iron block. The magnetized iron block and the magnet have different polarities of attraction, and the iron block "sticks" to the magnet. Let's just say that magnets are magnetic.
Data source: Baidu Encyclopedia
Can ordinary coil electromagnets be used underwater
No problem, there is a so-called magnetized water which specifically allows water to flow. through Made of loveants. Magnetized water is widely used in industry, agriculture and other fields. In daily life, washing clothes with magnetized laundry detergent solution can make the clothes cleaner. Interestingly, even if you use magnetized water instead of detergent, the washing effect is also very satisfactory. Magnetized water treated with static magnetizing field or strong magnetizing field has a certain effect on softening cardiovascular and cerebrovascular diseases. Patients with arteriosclerosis and coronary heart disease can drink it at their discretion; in gallstones and kidney stones. It is separated from the calcium carbonate component and has a certain effect of dissolving and discharging stones. It is beneficial for stone patients. However, since magnetized water treated with a strong magnetizing field can promote the dissociation of calcium ionsand promote the detachment of calcium crystals, elderly patients suffering from osteoporosis should not drink highly magnetized water.
Ordinary! (Quote) Ordinary products are not good, they are not waterproof, and cannot be guaranteed to prevent water leakage. They will cause short circuits and leaks after being put in water! Used underwater, electromagnetIt can be waterproofed, which will have some impact on magnetism, but not too much. Not only waterproof electromagnets can work underwater, but also waterproof cameras!
Did the key fall into the sea? Or a dagger? gun? An iron treasure chest? On?