Iron oxide black

Ferroferric oxide is a commonly used magnetic material. Special pure ferroferric oxide is used as raw material for recording tapes and telecommunication equipment. Natural magnetite is the raw material for ironmaking. Used for making primer and topcoat. Ferroferric oxide is the main raw material for producing iron catalyst. It has great hardness and can be used as abrasive. It has been widely used in the field of automobile braking, such as brake pads and brake shoes. Ferroferric oxide has been recognized in the field of welding materials in China, and its application in the production of welding electrodes and welding wires is still in its infancy, and its market prospect is very broad. Ferroferric oxide has shown good performance in sewage treatment because of its large specific gravity and strong magnetism. Ferroferric oxide can also be used as pigment and polishing agent. We can also use some chemical reactions, such as sodium nitrite, to make the surface of steel form a layer of dense ferroferric oxide, which can prevent or slow down the corrosion of steel, such as the blue and black surface of firearms and saw blades. Commonly known as "roast blue". Make special electrodes.