What is blackening

What is blackening

        The blackening process includes: washing, degreasing, washing, pickling, blackening, washing, drying, and oiling.

        Blackening treatment is also called bluing treatment, which is a method of metal surface treatment, and it is also a widely used metal anti-rust treatment technology. The blackened metal surface forms a black hard film, which can protect the metal surface from oxidation and achieve the purpose of rust prevention.

        The commonly used methods for blackening treatment are the traditional alkaline heating blackening and the late normal temperature blackening.