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Topic: corrosion  (Read 4864 times)

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Offline stars_below

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corrosion
« on: October 20, 2006, 09:00:12 PM »
does anyone know where i can find the name, formula, and colour of corrosion for aluminum, iron, copper, and silver

Offline Borek

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Re: corrosion
« Reply #1 on: October 21, 2006, 04:04:14 AM »
I would start with Google and/or Wikipedia...
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Offline stars_below

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Re: corrosion
« Reply #2 on: October 23, 2006, 08:57:23 PM »
can someone check if this is right

Name of metal            Formula of corrosion
Aluminum.....4Al(s) + 3O2(g) = 2Al2O3
Iron....4fe(s) + 3O2(g) =2fe2O3
Copper......2Cu(s) + O2(g) = 2CuO
Silver....4Ag(s) + O2(g) = 2Ag2O

Offline constant thinker

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Re: corrosion
« Reply #3 on: October 23, 2006, 09:21:19 PM »
Looks good.

Also for future reference, on the toolbar there is a button for subscripts and superscripts.
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Offline stars_below

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Re: corrosion
« Reply #4 on: October 24, 2006, 08:21:59 PM »
ok thanks,
i have another question, i'm reading from some sites that zinc would be a better protection on iron, while others say that aluminum will be better. it also says that usually the metals at the top of the reactivity series of metals are better for protecting because they form oxides more readily. aluminum is on top of zinc, so doesnt that mean that aluminum would be a better protection on iron compared to zinc?

Offline Borek

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Re: corrosion
« Reply #5 on: October 25, 2006, 12:04:48 PM »
Look for aluminum passivation.
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