Corrosion and Protection: [Question of the Day] 2011-04-29 (Friday)

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This post was last edited by eastchen on 2011-4-29 08:01. Corrosion and Protection: [Daily Question] 2011-04-29 (Friday). During the corrosion of steel, which of the following five changes may occur? ① Fe2+ is converted to Fe3+. ② O2 is reduced. ③ H2 is produced. ④ Fe(OH)3 loses water to form Fe2O3·H2O. ⑤ Impurity carbon is oxidized. A. Only ① and ② B. Only ②, ③, and ④ C. ①, ②, ③, and ④ D. ①, ②, ③, ④, and ⑤. 1) Please give your support; those who participate will definitely receive a reward； P/ a/ k3 ]' C: i" y `- e, A" k" `" o 2) Please hide your reply answers; the method for doing this is: http://bbs.hcbbs.com/thread-492556-1-1.html. Do not edit your replies after posting them. 3) The answer is as follows. Explanation: During the corrosion of steel, impurity carbon acts as the anode and does not participate in the electrode reactions; the other four scenarios can all occur. Answer: C