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InterviewSolution
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2) Which of the following is corroded faster? Iron pole in sea water or ironpole on the beach. |
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Answer» An iron object becomescoatedin atoms of a lessreactivemetal. As the new metal is lessreactive, it is slower to corrode. This process is common with gold, silver, nickel, copper and tin as they are low down in the reactivity series. For instance, tin cans are actually steel (containing iron)coatedin tin. Water is the enabler offastoxidation ofironso freshwater will also causerust. However,salt wateris a very good conductor (lots of dissociated ions) and so there are a number of electrolysis reactions that tremendously acceleratecorrosioninsalt water. |
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