How to prevent copper plate oxidation and maintain its shine?

1. Air-barrier surface coating

Coating the copper plate surface with transparent grease, paint, or a special protective agent forms a dense barrier layer, preventing oxygen in the air from directly contacting the copper surface, thus inhibiting oxidation.

2. Passivation treatment to form a dense passivation film

Chemical passivation using an oxidizing medium forms a thin, dense passivation film on the copper surface. This film adheres firmly and has high coverage, significantly reducing the corrosion rate.

Anti-discoloration tanks are often used on production lines for passivation, forming a stable anti-discoloration layer on the copper plate surface, improving its oxidation resistance.

3. Electrodeposited metal protective layer

Electrodeposition processes are used to plate the copper plate surface with metals such as zinc and chromium, forming a composite anti-oxidation film that prevents direct contact between the copper and air, improving long-term corrosion resistance.

4. Composite coating technology

Adding a composite layer containing nickel, phosphorus, or other alloys to the copper plate surface can maintain its shine and inhibit oxidation in high-temperature and high-humidity environments, suitable for industrial components with extremely high gloss requirements.