點解有隻reactive既metal cover係iron上面..iron就會冇禁易rust??
隻reactive既metal可以react with air...咁iron就唔會react??
點解唔可以用隻less reactive metal cover係上面等iron接觸唔到air?
點解sacrificial protection 可以防止iron rusting?
2008-08-12 9:53 pm
回答 (2)
2008-08-12 11:06 pm
✔ 最佳答案
答案如下： 答案如下： 答案如下：圖片參考：http://i277.photobucket.com/albums/kk75/uncle_michael/080812_chm_1a.jpg?t=1218524559
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圖片參考：http://i277.photobucket.com/albums/kk75/uncle_michael/080812_chm_1b.jpg?t=1218524592
2008-08-12 10:42 pm
At least two electrons will be lost when iron oxidated (rusted) in air. However, active metal will donate its electron to iron to prevent rusting. Since electron of active metal has lower electron state and easily lose.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080812000051KK01297