Copper and alloys primarily based upon copper are considered non-magnetic. This is an important physical property of Hiduron 130, a high-strength copper-nickel alloy used in subsea applications, such as connectors and couplings, as well as valve trim. As a copper-based alloy, it is resistant to fouling and galling, making it suitable for applications which see long periods on inactivity, but which are then are required to operate without sticking. Therefore, avoiding the potential influence of magnetic coupling is supportive of such applications.
If you have a sufficiently high magnetic all matter is magnetic. However, copper is so weakly magnetic that we cannot observe it without extremely large magnetic fields.
Magnetism and electricity are quite similar. When a magnet moves near copper or other metals, it sets up electrical eddy currents.
The eddy currents repel the magnet as it falls down the copper tube. This repulsion pushes against the magnet and in turn, slows it down.
If you would like to know more about copper-based alloys, please contact Langley Alloys today.