Asked by Stacy

How does the presence of impurities such as copper affect the rusting of a piece of sheet metal of iron?
Answered by Ms. Abraham
Any answer choices?
Answered by bobpursley
On steel ships, corrosion is greatly increased by having bronze (copper alloy) propellers. Current will flow from the props thru the (salt bridge) seawater, turning the Fe to Fe++. Copper embedded in the steel will do the same. http://www2.ucdsb.on.ca/tiss/stretton/chem2/corrosion.html
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