In life, metal rust is a very common phenomenon. In addition to electroplating, chemical and other techniques, blackening is a practical and simple method.
Blackening is a common chemical Surface Finishing method. The process has the advantages of short required time, low cost, simple equipment and convenient operation. Simply put, the principle is to use blackening liquid to form a dense oxide film on the metal surface. The oxide film can isolate the air, achieve the purpose of rust prevention, and prolong the service life of the metal.
Because the resulting oxide film is bluish-black, it is often referred to as bluish. The preparation work before blackening first needs to clean the scale, oil, rust and other impurities on the metal surface to prepare for the formation of a high-quality oxide film. Anti-rust oil can be applied to the metal surface to further enhance the anti-corrosion and anti-oxidation rust performance.
