Skip to contentBrass/Copper Oxidation Solution
Many customers have reported that the surface of the copper parts was oxidized when they received them, or parts oxidized after being stored for some time…
Customer Background:
- Industry: Medical
- Process: CNC Turning+CNC Milling
- Material: Brass
- Quantity: 100 pcs
- Tolerance: ±0.02 mm
Customer A
- Industry: Quantum Equipment
- Process: CNC Milling
- Material: Cu-ETP(R220)
- Quantity: 10 pcs
- Tolerance: ±0.05 mm
Customer B
What Problem We Met:
We have received feedback from these two customers, stating that there are oxidized spots on the surface of the components. Customer A discovered it some time after receiving it, while Customer B noticed it immediately upon receiving it.
Our previous process like below:
- Clean and dry the components
- Vacuum packaging
- Wear nitrile gloves to prevent sweat or dirty stuff from coming into contact with them.
- The entire operation process within the factory is maintained at a constant temperature and humidity level.
Even with such careful handling and the use of vacuum packaging, the customers still found oxidation when they received the goods. From the time we send out the product until the customer notices the oxidation, the entire process takes no more than one month.
How We Solve It: Do a Passivation
For such components, passivation is the best and most convenient method.
High precision, unchanged appearance, no interference with conductivity, cost-effective and environmentally friendly – these are the key features of the most widely used and cost-effective anti-oxidation process in the copper processing industry.
- No change in dimensional tolerance, ideal for precision machined parts.
- Original appearance remains unchanged without discoloration.
- Preserves excellent electrical conductivity and thermal conductivity.
- Low cost, simple operation and high production efficiency.
- Excellent anti-oxidation and anti-tarnish performance, prevent copper rust.
- Eco-friendly formula, meets international export environmental standards.
- Fingerprint-resistant, easy for handling and packaging.
- Does not affect subsequent welding, assembly and other processes.
Compared to the anti-oxidant effect, other methods, such as electroplating, painting, and anodizing. Passivation is the most economical, most effective option that does not affect the components themselves. However, for components that require bonding/insertion of parts on their surfaces, it is necessary to consider in advance whether the protective film formed after passivation will affect the functionality. It is suggested that some samples be produced in the early stage for verification. Once the plan proves feasible, it can be implemented.