Aluminum wire connection need to pay attention to what

[China Aluminum Network] Electrolytic corrosion will occur when copper conductors are connected to aluminum conductors in power lines. When the copper wire and the key wire are connected. Because the raw materials are not the same. There is a certain potential difference between each other. The potential difference between copper and aluminum is approximately 1.7V. If water vapor is present, the electrolytic effect will occur, and the touch surface will be gradually eroded and oxidized. This will result in poor touch surface, increased touch resistance, and high temperature of the wire, causing seizures. Thus, copper wire and aluminum When the wires are connected, the necessary anti-corrosion measures should be adopted. For example, copper-aluminum transition clamps and copper-aluminum transition joints are used to prevent electrolytic corrosion. In addition. It is also possible to use the copper wire tinning method, that is, a layer of tin is plated on the copper wire lead, and then it is connected with the moving wire. Although copper has a higher conductivity than tin. However, the oxidation of the tin surface will form a very thin oxide film. Attached to the copper surface. Then it can prevent the inside of the wire from being continuously oxidized. Also, this tin oxide has a high electrical conductivity and is less susceptible to electrical contact corrosion with the aluminum wire and does not cause problems due to poor touch.

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