Black Oxide Coating Process

Metals with a black oxide coating are dimensionally stable and have a matte black appearance.

Black oxide coating process.

Aka black penetrate black magic black n and gun bluing chicago il black oxidizing is an effective metal finishing process with which a black oxide blackening conversion coating is applied to parts to add corrosion resistance improve appearance minimize light reflection and serve as a base for other coatings. This means that the black oxide is not deposited on the surface of the substrate like nickel or zinc electroplating. This plating must be stripped prior to the black oxide process. Unlike nickel or zinc electroplating the black oxide is not deposited on the surface of the substrate.

Black oxide or blackening is a conversion coating for ferrous materials stainless steel copper and copper based alloys zinc powdered metals and silver solder. 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. The primary purpose of black oxide coatings is to provide an attractive uniform color to steel or iron parts. It is used to add mild corrosion resistance for appearance and to minimize light reflection.

The black oxide process occurs because a chemical reaction ensues between the surface of the metal part and materials used in the coating. The black oxide process is a chemical conversion coating. Black oxide should be used for indoor use or limited exposure to corrosive conditions. Black oxide can be applied through either a hot process or a cold process.

The black oxide process. Epi is the only supplier to offer all three black oxide chemical processes for steel. Black oxide blackening oxidizing black passivating gun bluing is a type of conversion coating process. Black oxide black oxide coating.

Great for car restorations where you want that factory bla. Tips and tricks to produce a durable original looking black oxide phosphate plating on used bolts. The supplementary coating after finish will dictate the final appearance and function of the part. A further advantage black oxide has over other coatings is that as a conversion coating there is minimal buildup which can generally be measured in microns.

Black oxide cannot be produced over plated parts zinc nickel chromium cadmium phosphate. This process produces by simple immersion a uniform black coating of ferro ferric oxide. To achieve maximal corrosion resistance the black oxide must be impregnated with oil or wax.