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    Bimetal­lic cor­ro­sion

    Bimetallic corrosion, also known as contact corrosion.

    Bimetallic corrosion, also known as contact corrosion, is corrosion caused by an electrochemical reaction between two different metallic materials in contact with one another and moisture. The less noble metal becomes an anode and rapidly disintegrates - the more noble metal becomes a cathode and the rate of disintegration slows.