Copper clad aluminum stripAlthough CCA tape has the advantages of light weight, low cost and acceptable conductivity, its performance may not meet the requirements of long-term stable use in certain specific environments.Not suitable for copper clad aluminum stripSeveral typical environments and occasions:
? Environments not suitable for using copper-clad aluminum strips:
1. Highly corrosive environment
- Such as: seaside, high salt fog area, chemical plant
- Reason: The air contains a large amount of corrosive components such as chloride ions and sulfides, which will accelerate the oxidation of the copper layer. Once the copper layer is damaged, the aluminum base is exposed and is more susceptible to corrosion, resulting in a decrease in conductivity or even breakage.
2. High humidity environment (long-term heat and humidity)
- Such as: tropical rain forest areas, underground humid places
- Reason: Long-term moisture will cause the copper layer to oxidize and fall off, and at the same time the risk of electrochemical reaction of aluminum will increase, resulting in "aluminum corrosion" phenomenon.
3. High temperature environment
- Such as: in a closed box, in an outdoor high temperature exposure area
- Reason: High temperature will accelerate the "delamination" and bulging caused by the difference in thermal expansion between the copper layer and the aluminum base; exceeding the operating temperature range (>105°C) may also cause material aging.
4. High frequency vibration/frequent mechanical shock
- Such as: transportation equipment, high-frequency moving parts of electric vehicles
- Cause: When the copper layer is not firmly bonded, long-term vibration will lead to metal fatigue, causing the copper layer to peel off or crack.
5. Critical circuits requiring high current or extremely low resistance
- Such as: high-precision instruments, trunk transmission lines
- Reason: Although copper-clad aluminum can meet certain conductivity requirements, its conductivity is still lower than that of pure copper and is not suitable for use in the main current channel with extremely high electrical performance requirements.
Summarize:
| Environment Type | Is it suitable to use CCA belt? | Reason |
|---|---|---|
| Seaside and salt spray areas | ? Not Suitable | High risk of corrosion, copper layer easily falls off |
| Hot and humid environment | ? Not Suitable | Easy to oxidize and corrode aluminum |
| High temperature exposure or closed box | ?? Use with caution | Thermal stress affects copper-aluminum bonding |
| High vibration, high shock | ? Not Suitable | Copper peeling risk |
| High current mains, power lines | ? Not Recommended | The conductivity is not as good as pure copper |
Of course, if the copper-clad aluminum strip is produced by a professional manufacturer (such asRaytron) is provided, and enhanced processing (such as thick copper layer, reliable composite process, high-quality coating) is adopted, and good packaging and protection measures are taken in the system, and it can also be used under some marginal conditions.
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