14_440_407Homework6

14_440_407Homework6 - 1 Rutgers University School of...

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1 Rutgers University 14-440:407 School of Engineering Mechanical Properties of Materials Dept. of Materials Science & Engineering HOMEWORK #6 1. (a) Briefly explain the difference between oxidation and reduction electrochemical reactions. (b) Which reaction occurs at the anode, and which at the cathode? 2. Would you expect iron to corrode in water of high purity? Why or why not? 3. Why does chromium in stainless steels make them more corrosion resistant in many environments than plain carbon steels? 4. (a) What are inhibitors? (b) What possible mechanisms account for their effectiveness? 5. Briefly describe the two techniques that are used for galvanic protection.
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2 1. (a) Oxidation is the process by which an atom gives up an electron (or electrons) to become a cation. Reduction is the process by which an atom acquires an extra electron (or electrons) and becomes an anion. (b) Oxidation occurs at the anode; reduction at the cathode.
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