Views: 35 Author: Site Editor Publish Time: 2021-06-04 Origin: Site
Black chrome is a coating of chromium that has been chemically altered to achieve a black color. The black chrome finishes is used on non-reflective surfaces and usually required a post-dip in a oil solution for the metal finishing portion.
Black chrome plating has a unique appearance, which not only shows the high reflectance of polished chrome, but also has a depth that other polished surfaces do not have. Black chromium is usually plated on bright or dark nickel in the same way as decorative chromium. The black chrome plated surface is hard and durable, and provides some protection against rust and corrosion, mainly due to the need for copper and nickel plated substrate. This special black chrome surface provides a hard surface with corrosion resistance and wear resistance. This process can better cover the entire part. The appearance of the black chromium coating depends on the properties of the substrate and the surface treatment before electroplating. The finish can be glossy, semi glossy or matte. The topcoat can be waxed or oiled to improve the final appearance.
Blackening is a common method of chemical surface treatment. The principle is to produce a layer of oxide film on the metal surface to isolate the air and achieve the purpose of rust prevention. When the appearance requirements are not high, blackening treatment can be used. The surface of steel parts is blackened, which is also called bluing.
Although blackening and black chromium have anti-corrosion effect, the method, effect and cost are quite different.