Black oxide or blackening is a conversion coating for ferrous materials stainless steel copper and copper based alloys zinc powdered metals and silver solder.
Stainless steel black oxide coating.
Black oxide is a form of coating used as a finish for ferrous metals stainless steel and copper and its alloys.
Black oxides on steel are not suitable for severe outdoor applications or corrosive environments but they can provide superior humidity cabinet results with proper supplementary coating.
Black oxide like other coatings is used to provide protection to the part achieve a required appearance or achieve other desired properties.
However it is different from other coatings in the way that the process is a conversion type coating.
Instead the black oxide coating is produced by a chemical reaction between the iron on the surface of the ferrous metal and the oxidizing salts present in the black oxide solution.
Use a room temperature blackening process to give steel parts satiny grey black finishes.
Cold black oxide is not an oxide conversion coating.
The black oxide process is a chemical conversion coating.
It is a deposited copper selenium compound.
To achieve maximal corrosion resistance the black oxide must be impregnated with oil or wax.
Hot black oxide converts the surface into magnetite.
It is used to add mild corrosion resistance for appearance and to minimize light reflection.
This means that the black oxide is not deposited on the surface of the substrate like nickel or zinc electroplating.
Black oxide or blackening is a conversion coating for ferrous materials stainless steel copper and copper based alloys zinc powdered metals and silver solder.
Superior black oxide finishes for stainless steel room temperature 65 85 f room temperature black oxide processes are best for quick safe and convenient in house and even at home blackening.
It is used to add mild corrosion resistance for appearance and to minimise light reflection.
One of its advantages over other coatings is its minimal buildup.