Pigment of Iron Oxide

Pigment of Iron Oxide

Iron Oxide is a chemical compound composed by Iron and Oxygen. There are differet iron oxides with different chemical formula.

FeO Wustite

Fe2O3 Hematite (Red)

Fe3O4 Magnetite (Black)

FeO(OH)·nH2O Limonite

Natural iron oxides pigments are derived from hematite, which is a red iron oxide mineral; limonites, which vary from yellow to brown, such as ochers, siennas, and umbers; and magnetite, which is black iron oxide.

Synthetic iron oxide pigments are produced from basic chemicals. There are three major methods for the manufacture of synthetic iron oxides:

• thermal decomposition of iron salts or iron compounds
• precipitation of iron salts usually accompanied by oxidation
• reduction of organic compounds by iron

Iron Oxide Pigments are mainly used in production of paint as for example automotive paints and wood finishes.

Credit: U.S. Geological Survey - Department of the Interior/USGS

see also:

What is Iron Oxide

what is rust?

what is corrosion?

source:

IRON OXIDE PIGMENTS

http://www.greatvistachemicals.com/dyes_and_pigments/transparent_iron_oxide_pigment.html

http://en.wikipedia.org/wiki/Limonite