Copper Conductivity Degradation
Copper conductivity degradation is the drop in electrical conductivity of pure copper due to small amounts of impurities that disturb the crystal lattice. This causes higher resistance heating and can lead to line failures over time.
Physical-Chemical Mechanism of Action
Copper conductivity degradation is caused by the buildup of foreign elements such as sulfur, arsenic, or lead in pure copper. These elements alter the periodic potential of the crystal lattice and impede electron movement, leading to increased electrical resistance.
Metallurgical Relevance & Welding Risks
During the production or processing of copper products, conductivity can be affected by even small residual amounts of foreign elements. This can result in higher resistive heating and lead to electrical failures, especially at high temperatures or under heavy electrical loads. The service life of electronic components and copper wiring can be significantly reduced as a result.
Workshop Practice & Action Instructions
To prevent copper conductivity degradation, it is important to ensure high purity and low levels of foreign elements when producing pure copper. During processing or welding of copper products, carefully choose the temperature and surrounding medium to minimize the buildup of foreign elements. If conductivity degradation is suspected, check the products' electrical conductivity and, if necessary, rework them.