Iron oxide pigments production

Iron oxide pigments are low-cost materials that resist color change due to sunlight exposure, have good chemical resistance, and are stable under normal environmental conditions. Pigments are primarily used in paints, coatings, and construction materials such as concrete, mortar, paving stones, and roofing tiles. Natural pigments are used in primers and undercoats where color consistency isn't as important, whereas synthetic pigments are used in topcoat paints where color consistency is critical.
Steelmaking also produces iron oxide pigments. When hydrochloric acid is used to remove surface oxides from steel, the acid is regenerated and iron oxide is produced. Iron oxides that have been regenerated are used in a variety of filters, inductors, and transformers in electronic home appliances and industrial equipment, as well as flexible magnets, generators, loudspeakers, and electric car motors.