amp;nbspamp;nbspamp;nbspamp;nbspamp;nbspamp;nbspamp;nbspamp;nbspFirst of all, based on my experience, it is unlikely that the circuit breaker contacts are made of copper and silver-plated. Because silver has good electrical conductivity, but pure silver has poor impact resistance, circuit breaker contacts are generally made of silver alloy.
amp;nbspamp;nbspamp;nbspamp;nbspamp;nbspamp;nbspamp;nbspamp;nbspThe oxide layer on the surface of the circuit breaker contact will cause the contact resistance to increase, and will cause contact when the circuit breaker is working. The temperature of the contact head rises, which may cause the contact head to become fuzzed, melted or burned in severe cases.
amp;nbspamp;nbspamp;nbspamp;nbspamp;nbspamp;nbspamp;nbspamp;nbspIf the surface shows black oxide, you can use a clean cloth dipped in detergent or alcohol to wipe it. If there are still some stains, you can not To remove, you can use a fine assorted file to carefully file away the stain (be careful not to use emery cloth to polish it).