How to choose a suitable Dalian blackening surface treatment method for your product?

Dalian blackening surface treatment not only beautifies the appearance of objects, but also has certain practicality. With the continuous progress of process technology, the methods of blackening surface treatment are also constantly developing and improving to meet the needs of different fields. The effect of blackening surface treatment can vary depending on the material of the object, and the treated surface sometimes requires certain protective measures to prevent the film layer from falling off or being damaged. In addition, blackening surface treatment can also improve the wear resistance, corrosion resistance, and oxidation resistance of objects to a certain extent.

When implementing blackening surface treatment, a series of processes are required to achieve it. Firstly, the surface cleaning process is used to ensure that the product surface is clean and free of impurities. Then, pre-treatment processes such as pickling, electroplating, etc. are carried out to increase surface roughness and adhesion. Next is the black treatment process, such as chemical blackening, physical blackening, etc., to give the product a black like appearance. The following is surface protection processes, such as spray painting or coating, to protect the surface of the product from external environmental influences.

How to choose a suitable Dalian blackening surface treatment method for your product?

Chemical blackening: Chemical blackening is the formation of a deep gray to black oxide film on the surface of a metal through physical and chemical reactions, preventing metal corrosion and oxidation. The commonly used chemical blackening methods include hot blackening and cold blackening. Heat blackening is suitable for metals such as copper, brass, and steel, and requires treatment at high temperatures to improve surface hardness and corrosion resistance. Cold blackening is suitable for metals such as silver, nickel, zinc, etc. It does not require heating process, but the treated surface is harder and prone to peeling and scratching.

Oxidized Blackening: Oxidized Blackening is the process of forming a dense oxide layer on the surface of a metal through high-temperature oxidation reactions, resulting in a black appearance on the metal surface. Commonly used metals that oxidize and turn black include steel, iron, zinc, etc. The oxidation blackening process is simple and cost-effective, but the thickness of the oxide layer is difficult to control and is prone to detachment.

Sulfurization blackening: Sulfurization blackening is the process of exposing a metal to sulfur-containing gas, causing the metal surface to react with the gas to form a sulfide layer, resulting in a black surface. Sulfurization blackening is suitable for metals such as copper and silver, which can make the metal surface appear uniformly black and has good corrosion resistance and wear resistance.

Blackening of paint: Blackening of paint refers to the spraying of a special black paint on a metal surface to make the surface appear black. This method is suitable for various metal materials and can achieve good anti-corrosion and wear resistance effects. But attention should be paid to the adhesion and durability of the coating to prevent peeling and peeling.

Electrochemical blackening method utilizes the oxidation reaction between the electrolyte in the electrolyte and the metal surface to form a black oxide film. This method requires the use of electrolytic equipment for operation and is suitable for various metal materials. Common electrolytes include alkaline sodium chloride solution, copper sulfate solution, etc. The electrochemical blackening method can control the thickness and color of the oxide film, and has high process controllability.

Blackening surface treatment refers to the special treatment of the surface of an object to give it a black or black like appearance. This treatment is usually used to beautify the surface of the object, increase its ornamental value, and also serve functions such as corrosion resistance, wear resistance, and oxidation resistance.