Aluminum alloy breaks when copper is twisted

Caused by electrochemical corrosion, metal mismatch and other reasons.

1. There is an electrochemical corrosion reaction between aluminum and copper. When in contact with each other in a humid or electrolyte environment, electrochemical corrosion occurs, causing the aluminum alloy to break.

2. Aluminum and copper have different physical properties and electrical conductivity. The thermal expansion and contraction coefficients are different. The strength of aluminum is relatively low. When copper is twisted, due to factors such as temperature changes, mechanical stress or vibration, , Aluminum alloys are prone to deformation, fatigue and fracture.