Copper Antioxidation – Exploring the Mysterious Power of Copper Passivation Solution

In the field of metal processing, copper is a common material widely used due to its excellent conductivity, thermal conductivity, and ductility. However, copper is prone to oxidation in the air, forming a thin oxide film that leads to a decrease in performance. To enhance the antioxidation properties of copper, various methods have been employed, among which the use of copper passivation solution proves to be an effective solution. This article will elaborate on the method of copper antioxidation using copper passivation solution.

I. Principles of Copper Passivation Solution

Copper passivation solution is a chemical treatment agent that forms a stable oxide film on the surface of copper, preventing contact between copper and oxygen, thereby achieving antioxidation.

II. Methods of Copper Antioxidation

Cleaning: Start by cleaning the copper to remove surface impurities such as oil and dust, ensuring that the passivation solution can fully contact the copper surface.

Soaking: Immerse the cleaned copper in the passivation solution, usually requiring 3-5 minutes for the solution to thoroughly penetrate the copper surface. Control temperature and time during soaking to avoid suboptimal oxidation effects due to rapid or slow processing.

Rinsing: Place the filtered copper in clean water to rinse off residual passivation solution and impurities. During rinsing, observe whether the copper surface is clean, and repeat the process if necessary.

Drying: Allow the rinsed copper to air dry in a well-ventilated area or use an oven for drying.

Inspection: Conduct antioxidation performance testing on the dried copper.

III. Precautions

Strictly follow the prescribed proportions when preparing the passivation solution to avoid excessive or insufficient amounts affecting treatment effectiveness.

Maintain a stable temperature during the soaking process to prevent variations that could result in poor oxide film quality.

Avoid scratching the copper surface during cleaning and rinsing to prevent any adverse effects on passivation effectiveness.