Black Oxide Coating Process

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Black oxide coating process.

The black oxide process. Tips and tricks to produce a durable original looking black oxide phosphate plating on used bolts. 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.

Metals with a black oxide coating are dimensionally stable and have a matte black appearance. The supplementary coating after finish will dictate the final appearance and function of the part. 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. Unlike nickel or zinc electroplating the black oxide is not deposited on the surface of the substrate.

This plating must be stripped prior to the black oxide process. Black oxide should be used for indoor use or limited exposure to corrosive conditions. The black oxide process occurs because a chemical reaction ensues between the surface of the metal part and materials used in the coating. The coating has almost no thickness.

Black oxide black oxide coating. The black oxide process is a chemical conversion coating. This means that the black oxide is not deposited on the surface of the substrate like nickel or zinc electroplating. To achieve maximal corrosion resistance the black oxide must be impregnated with oil or wax.

Hot black oxide 285 f mid temperature black oxide 225 255 f room temperature black oxide 65 85 f all of our black oxide processes can be used in house saving finishing costs cutting lead times and increasing productivity and quality. This process produces by simple immersion a uniform black coating of ferro ferric oxide. Black oxide cannot be produced over plated parts zinc nickel chromium cadmium phosphate. It is used to add mild corrosion resistance for appearance and to minimize light reflection.

Black oxide can be applied through either a hot process or a cold process. The metal in the part reacts with chemicals used during the surface treatment to create a hard magnetic black iron oxide shell over ferrous alloys. 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.