The introduce of cold galvanizing

In the CNC machining, many materials need cold galvanizing to protect the material oxidation and improve the wear-resisting property.

Cold galvanizing, also called electricity galvanized, is the use of electrolytic equipment put pipe after degreasing, pickling in composition of zinc salt in the solution, and connect the cathode electrolytic equipment, across the tube placed zinco, connected to the anode electrolytic equipment, power supply is connected using current from the positive to the negative directional moving deposits a layer of zinc on the pipe fittings, cold is plated fittings galvanized after processing.

Cold galvanized coating is mainly anticorrosive through the electrochemical principle, so it is necessary to ensure the full contact between zinc powder and steel, resulting in electrode potential difference, so the surface treatment of steel is very important.

High quality cold galvanized, steel and meet the specifications of the surface treatment, but also must rely on good painting construction, in order to give full play to the greatest advantages of cold galvanized, give steel effective protection. In addition to various specifications and types of cold galvanized aerosol tanks, the most commonly used construction methods of cold galvanized are brush coating, air spraying and high pressure airless spraying. Roller coating speed is fast, but because of poor permeability, in the coating will often trap air, so it is not suitable for the primer “cold galvanized” coating.

Post time: Sep-21-2022