Pyrolusite (MnO2) doesn't rust.
no
it is essential for steel making.
See the link below.
The most known mineral is pyrolusite - MnO2.
Magnetite is a naturally occurring magnetic mineral composed of iron oxide (Fe3O4), whereas pyrolusite is a mineral composed of manganese dioxide (MnO2). Magnetite is black or gray in color, has a metallic luster, and is magnetic, while pyrolusite is typically black or dark gray and has a dull to submetallic luster. Magnetite is commonly used in industries like mining and construction, while pyrolusite is used in the production of dry cell batteries and as a pigment in ceramics and glass.
Pyrolusite is a manganese oxide mineral, that has yet to cause any fatalities. It could kill you if you grind it very fine and inhale it, or eat enough of it, or drop a block of it on your head, but other than that it's not much of a hazard to anybody.
Feldspar (porcelain)Pyrolusite (coloring)Chromite (plumbing fixtures)Copper (tubing)
Chlorine compounds have been important to humans for thousands of years. Ordinary table salt, for example, is sodium chloride (NaCl). Still, chlorine was not recognized as an element until 1774, when Scheele was studying the mineral pyrolusite. Pyrolusite consists primarily of manganese dioxide (MnO 2 ). Scheele mixed pyrolusite with hydrochloric acid (HCl), then called spiritus salis. He found that a greenish-yellow gas with a suffocating odor "most oppressive to the lungs" was released. The gas was chlorine.
The formula of the brown oxide of manganese is MnO2.Manganese dioxide is the inorganic compound is the blackish or brown solid occurs naturally as the mineral pyrolusite, which is the main ore of manganese.
Johann Gahn discovered manganese in 1774 in the ore pyrolusite at a mine in Bergslagen, Sweden.
Plastic pipe does not rust, brass does not rust, copper does not rust. Stainless steel does not rust, lead pipe does not rust.
Something that is rust resistant will not rust easily; minor exposure to water will not cause it to rust. Something that is rust proof will not rust.