![]() | |
| | #1 (permalink) |
| Premium Member HSC: N/A Gender: Male
Join Date: Feb 2008
Posts: 19
Last Activity:
12 Nov 2009, 8:30 PM ![]() | Strange result for practical You can hide this advertisement by registering. I have an experiment where magnesium is wrapped around a nail and placed in a petri dish filled with agar/saltwater and indicators to locate anode and cathode. The nail does not corrode beacuse its oxidation reaction has been stifled. Only query is: a white substance has formed around the magnesium on the nail. Magnesium oxide possibly? anyways, what is it, and why is it there? how is this combatted in industrial Mg anodes? |
| | |
| | #3 (permalink) |
| In standby HSC: 2009 Gender: Male
Join Date: Sep 2008
Posts: 546
Last Activity:
18 Nov 2009, 9:09 AM ![]() ![]() | Re: Strange result for practical Yep. I think itd be magnesium Hydroxide. My guess is that the experiment has been set up for some time? Magnesium is a pretty reactive metal as you know. Although, it is also a self-passivating metal, thus the outer oxide layer neutralises its reactivity. But it seems as though somehow, the agar/saltwater has disintegrated its outer oxide layer, so it readily reacts with hydroxide ions in water.
__________________ Pinnacles of success naturally plummet into failure - jealousy rears its ugly head again. |
| | |
![]() |
| Bookmarks |
| Thread Tools | |
| Rate This Thread | |
| |