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In a galvanic couple,  the component that will corrode is the one which is most

Question

In a galvanic couple,

the component that will corrode is the one which is most

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Solution

In a galvanic couple, the component that will corrode is the one which is most "anodic" or "active".

Here are the steps to understand this:

  1. A galvanic couple is a pair of different metals or alloys having different electrode potentials. When these two metals are in contact and immersed in an electrolyte (like water), an electrochemical reaction can occur.

  2. In this reaction, one metal (the anode) will start to corrode, while the other metal (the cathode) will be protected from corrosion. This is because the anode is more "active" or "anodic" than the cathode.

  3. The anode is the metal that has a more negative electrode potential. This means it is more likely to lose electrons and corrode.

  4. The cathode, on the other hand, has a more positive electrode potential. It is less likely to lose electrons and therefore less likely to corrode.

  5. So, in a galvanic couple, the component that will corrode is the one which is most anodic or active. This is the basic principle behind galvanic corrosion.

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