Trains powered by electricity, including subways, use direct current. One conductor is the overhead wire (or “third rail” forsubways), and the other is the rails upon which the wheels run.The rails are on supports in contact with the ground. To mini-mize corrosion, should the overhead wire or the rails be con-nected to the positive terminal? Explain.
Science behind corrosion-test
Corrosion is defined as an activity that transforms refined metals into more chemically stable forms such as oxide, hydroxide, carbonate, or sulfide. It refers to the slow decomposition of things (typically metals); thanks to chemical and/or electrochemical reactions with their surroundings. Corrosion engineering is the science of preventing and controlling corrosion.
Corrosion
Corrosion is defined as an activity that transforms refined metals into more chemically stable forms such as oxide, hydroxide, carbonate, or sulfide. It refers to the slow decomposition of things (typically metals); thanks to chemical and/or electrochemical reactions with their surroundings. Corrosion engineering is the science of preventing and controlling corrosion.
Trains powered by electricity, including subways, use direct current. One conductor is the overhead wire (or “third rail” forsubways), and the other is the rails upon which the wheels run.The rails are on supports in contact with the ground. To mini-mize corrosion, should the overhead wire or the rails be con-nected to the positive terminal? Explain.
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