Dalian metal surface treatment processing: galvanizing, chrome plating, passivation empowers the protection of automotive mechanical components

Dalian metal surface treatment processing: galvanizing, chrome plating, passivation empowers the protection of automotive mechanical components

In the automotive and mechanical manufacturing industry, the corrosion resistance and wear resistance of components directly determine the reliability and service life of the entire machine. The processes of galvanizing, chrome plating, and passivation in metal surface treatment have become the core supporting processes for the manufacturing of automotive mechanical components with precise performance empowerment, laying a solid quality defense line for key components such as crankshafts, gears, and fasteners.

The surface treatment and galvanizing process of Dalian metal is the basic guarantee for rust prevention of automotive mechanical components. Through electrolysis, a uniform zinc layer is formed on the surface of the components, and the sacrificial anode effect of zinc is used to isolate corrosive media. We adopt a dual process scheme of hot-dip galvanizing and electroplating galvanizing: the thickness of the hot-dip galvanizing layer can reach 50-100 μ m, suitable for heavy-duty anti-corrosion scenarios such as chassis fasteners; Electrogalvanizing achieves precise control of 10-20 μ m, meeting the dimensional requirements of precision components inside the engine. Combined with passivation treatment to form a composite protective layer, the rust prevention time of components is increased to more than 10 years in high temperature, humidity, salt spray and other automotive operating environments.

 

The chrome plating process focuses on the wear resistance and aesthetic requirements of components, especially suitable for high-frequency friction parts such as automotive shock absorber piston rods and mechanical transmission gears. By using hard chromium electroplating technology, a high hardness chromium layer of HV800 or higher is formed on the surface of the components, which improves the wear resistance by three times compared to untreated components. At the same time, the mirror level surface finish reduces operating resistance. The passivation process, as a key supporting link, seals the micro hole defects of galvanized and chrome plated layers through chromate or chromium free passivation treatment, further enhancing corrosion resistance and complying with environmental standards in the automotive industry.

We are deeply engaged in the field of surface treatment of automotive mechanical components and have established a full process control system of "process selection pretreatment electroplating passivation quality inspection". Customize a combination of galvanized, chrome plated, and passivated solutions for different scenarios such as gearbox gears and brake system components, suitable for complex working conditions such as high and low temperatures, vibrations, and loads. With ISO/TS 16949 certification for the automotive industry, we have provided supporting services to multiple OEMs, achieving efficient delivery from small batch samples to large-scale production. Choose our Dalian metal surface treatment processing to inject long-lasting protection and core competitiveness into automotive mechanical components.