Iron rust refers to iron oxide or iron carbonate

Iron oxide. Rust is a chemical reaction that rusts when iron is left unused for a long time. Iron is susceptible to rust, not only because of its chemical activity, but also because of external conditions.

Moisture is one of the substances that makes iron rust easily. However, only water does not rust iron, and only when oxygen in the air is dissolved in water, the oxygen reacts with iron in an environment with water to form iron oxide, which is rust.

Rust is a brownish-red substance, it is not as hard as iron, it can easily fall off, and after a piece of iron is completely rusted, the volume can expand by 8 times. If the rust is not removed, the spongy rust is particularly easy to absorb water, and the iron will rust faster. Iron will be heavier when it rusts, about 3 to 5 times its original weight.

Refers to a series of oxidation products of iron fexoy and water community fexoy*zh2o

It is a hydrate of iron oxide, ferrous oxide.

Iron rust is both corroded and oxidized.

The process of iron rusting can be divided into two categories:

1. Chemical corrosion, iron directly reacts with oxygen at high temperature to obtain iron oxide.

2. Electrochemical corrosion (general), divided into two types: hydrogen evolution corrosion, corrosion that occurs in a highly acidic and humid environment.

Oxygen corrosion is the most common in nature.

Conditions: Impure iron, air, humid environment.

Here's how it works: In a humid environment, impure iron (containing carbon) forms iron--- oxygen-water countless tiny galvanic cells.

Rust is generally ferric oxide, with a small amount of iron hydroxide.

Iron is corroded by oxygen in the air to form iron hydroxide, which is weathered into ferric oxide in the air, that is, iron oxide, so rust is generally ferric oxide, and may contain a small amount of iron hydroxide in humid air.

Rust, the name of traditional Chinese medicine. Also known as iron coat. It is a reddish-brown rust coat formed by oxidation of iron in the air.

It is produced all over the country. It has the effect of clearing heat and detoxifying, calming the heart and calming the liver. It is mainly used for the treatment of boils, swelling, lacquer sores, aphthous ulcers, heavy tongue, scabies, burns, poisonous insect stings, athlete's foot, and epilepsy.

Rust is a mixture of iron oxide and ferric tetroxide. Ordinary steel products gradually change color in the humid air, and form a reddish-brown substance on the surface of the void leakage, this phenomenon is called rust of steel. Its essence is a hydrate of various oxides of iron and oxygen and water vapor in the air to form iron.

Rust is powdered or flaked, reddish-brown or tan-colored. Opaque; No metallic luster. The body is heavier, and the flaky ones are fragile. Odorless, tasteless. Touch the hand.

Iron oxide is a reddish-brown to reddish-brown powder. Odorless. Insoluble in water, organic acids and organic solvents.

Soluble in inorganic acids. Stable to light, heat and air. It is relatively stable to acids and alkalis.

Strong tinting strength. Relative density. If the content is low, the relative density is small.

Refractive index. The melting point is 1550, and it decomposes at about 1560.

Ferric tetroxide, commonly known as iron oxide black, magnetite, and black iron oxide, is a magnetic black crystal, so it is also called magnetic iron oxide. This substance is soluble in acid solution, insoluble in water, sogou alkali solution and organic solvents such as ethanol and ether. Natural ferric tetroxide is insoluble in acid solution and is easily oxidized into iron oxide (Fe O) in the air in a humid state.

It is commonly used as a pigment and polishing agent, and can also be used in the manufacture of audio tapes and telecommunication equipment.