なぜ銅とアルミニウムのワイヤーを接続できないのか?

したがって、銅とアルミニウムを直接接続しないでください. 銅とアルミニウムの接続が避けられない場合, copper-aluminum transition clips or copper-aluminum transition joints are required.

If they are directly connected, 彼らが水で形成された電解質に出会ったら, 二酸化炭素およびその他の不純物, 化学バッテリーが形成されます. This is because aluminum is easy to lose electrons to become a negative electrode, and copper is difficult to lose electrons to become a positive electrode. An electromotive force of 1.69V is formed between, and a small current passes through, which corrodes the aluminum wire, which is the so-called galvanic corrosion. This will cause poor contact between copper and aluminum and increase the contact resistance. When a current passes through, the temperature of the joint will increase, which will further accelerate the corrosion of the joint, increase the contact resistance, and cause a vicious circle until it burns out.