The valence of manganese is +2, +3, +4, +5, +6 and +7. Manganese, chemical element, element symbol Mn, atomic number 25, is a gray, hard, brittle and shiny transition metal. Pure metal manganese is a slightly softer metal than iron. Manganese containing a small amount of impurities is hard and brittle, and will be oxidized when wet.

Brief introduction of manganese

The earliest use of manganese can be traced back to the Stone Age. As early as 17000 years ago, manganese oxide (pyrolusite) was used as a pigment in cave murals by people in the late Paleolithic period, and manganese was later found in weapons used by Spartans in ancient Greece. Ancient Egyptians and Romans used manganese ore to decolorize or dye glass.

Uses in iron and steel industry, mainly used for desulfurization and deoxidation of steel; It is also used as an alloy additive to improve the strength, hardness, elastic limit, wear resistance and corrosion resistance of steel. In high alloy steel, it is also used as an austenitic compound element for refining stainless steel, special alloy steel and stainless steel covered electrode. In addition, it is also used in nonferrous metals, chemical industry, medicine, food, analysis and scientific research.