Steel is the most commonly coated metal of all. The coating is formed by a chemical reaction on the steel to form a black captivating appearance. It is formed at room temperature and is a relatively safe process.
Blackening is an operation for finishing which uses chemicals amalgam that keeps holds of the aluminium creating a permeable base, allowing the chemicals to bind together on the metal. Cold blackening the steelworks at room temperature without using any hot application. Copper and Selenium is the chemical compound for cold blackening. Oil, wax, or lacquer is applied to the black oxide coating, keeping close contact with the aluminium substrate preventing corrosion of the surface.
The finishing of the metal keeps the components protected from corrosion, provides anti-galling and minimises light reflection on the metal. This is also done to match the interiors decors or internal aesthetic. Rather than painting or plating the aluminium, blackening is a less expensive process. Blackening does not modify the dimension of the component as the coating is only 0.000030 inches thick so the additional thickness is negligible for most.
Blackened Steel is only suitable for internal use and in non corrosive environments. The blackening process for internal steel doors and partitions is perfect for large architectural projects as they not only benefit the aesthetic look of the property but also provide additional strength.