Corrosion and Protection: 【Question of the Day】2011-03-07 (Monday)

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This post was last edited by Litaotao1314 on 2011-3-8 08:49. Multiple-choice question: Which of the following statements regarding metal corrosion is correct? A. When the tin plating on tinplate is damaged and starts to corrode, it is the plating that oxidizes first ； B. The electrochemical corrosion that occurs in metals under normal conditions is mainly oxygen absorption corrosion ； C. At room temperature, metals exposed to air mainly undergo chemical corrosion. Note: 1) Please give your generous support; all participants will receive a reward ； 2) Please hide the answers to your replies; the method for doing this is: http://bbs.hcbbs.com/thread-492556-1-1.html. Do not edit the replies after posting them. 3) The answer is as follows. Answer: B After the coating is damaged, a galvanic cell is formed, leading to corrosion ； At room temperature, metals exposed to air primarily undergo electrochemical corrosion.