Metal Plating

As the performance requirements of metal parts in the modern manufacturing industry continue to increase, the importance of electroplating technology for metal stamping parts and electroplating technology for metal welded parts has become increasingly prominent. As a Chinese factory focusing on the production of metal stamping and welding parts, we have been deeply involved in the industry for more than 20 years, serving the fields of electrical equipment, home appliances, communications, new energy, intelligent manufacturing, etc., providing customized processing services for materials including copper, brass, aluminum alloy, stainless steel, carbon steel and zinc alloy, and relying on multiple fully automatic and semi-automatic electroplating lines, we have achieved flexible switching from batch orders to small batch samples. We not only have systematic solutions for electroplating technology for metal surface treatment but also provide customers with high-quality, cost-saving, and functional overall services through advanced process control and surface treatment experience.
 

1. Electroplating treatment of copper and brass stampings/welded parts

Copper and brass are widely used in electrical connectors, terminals, and conductive parts due to their good conductivity and ductility. To improve its corrosion resistance, oxidation resistance, and welding performance, the following surface treatment methods are often used:

2. Surface anodizing of aluminum alloy stampings/welds

Aluminum alloy is widely used in structural parts, heat dissipation parts, and lightweight parts, but its corrosion resistance and wear resistance are relatively weak. It is usually treated with metal anodizing for surface strengthening:

3. Decorative and functional electroplating of stainless steel stampings/welds

Stainless steel itself has a certain degree of corrosion resistance, but for aesthetics, electrical performance, or assembly requirements, the following electroplating or passivation treatment is often performed:

4. Anti-rust protection treatment of carbon steel stampings/welds

Carbon steel is cheap and has high mechanical strength, but it is easy to rust. We use the following processes to increase its service life:

(1). Galvanizing (electro galvanizing, hot-dip galvanizing): forms a protective layer to effectively prevent oxidation corrosion.
(2). Phosphating treatment + anti-rust oil: enhance coating adhesion for subsequent spraying or assembly.
(3). Nickel plating/tin plating: improves conductivity and anti-rust performance, commonly used in electrical assembly parts.

(4). Dacromet treatment: no risk of hydrogen embrittlement, especially suitable for high-strength fasteners

(5). Typical applications: meter structural parts, brackets, chassis connectors, fastening connectors, etc.

Attached is a process comparison table:

5. Electroplating and decorative treatment of zinc alloy die castings

Zinc alloy has excellent molding performance and is often used for high-precision housings and connectors. The surface needs to be finely processed:

(1). Trivalent chromium plating (environmentally friendly chrome plating): Improve the appearance and texture and meet RoHS environmental standards.
(2). Nickel plating/copper plating + chrome plating composite plating: Layer-by-layer protection, suitable for high-end appearance parts or structural parts.

(3). Typical applications: smart lock structural parts, instrument panels, household appliance housings, etc.

We have established a perfect metal surface treatment quality control system, implementing full-process quality traceability and control from raw material entry, electroplating pre-treatment, coating control to finished product inspection:

1. Fully automatic electroplating production line: achieve high efficiency and stable quality, especially suitable for large-scale metal stamping parts electroplating and metal welding parts electroplating;

2. Multiple semi-automatic electroplating lines: flexibly cooperate with customers' small and medium-sized batch customization needs;

3. Surface pretreatment process (degreasing, pickling, activation): ensure substrate cleanliness and improve coating adhesion;

4. Coating thickness control system: through XRF coating tester precision detection, ensure that technical parameters meet the requirements;

5. Salt spray test and high-temperature aging test: verify anti-corrosion ability and ensure the reliability of the terminal use environment;

6. Process parameter real-time monitoring system: automatically records current, voltage, and tank concentration, and warns of abnormal fluctuations.

As a factory that has been deeply involved in the field of surface treatment for more than 20 years, we can provide the following differentiated services according to the structure, performance, and use environment of different customer products: