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Old 02-22-2012, 01:48 AM
ibpointless2 ibpointless2 is offline
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Join Date: Sep 2010
Posts: 829
I had a few people ask me to show them the amps on a cell that has the petroleum jelly on the magnesium electrode and here is that video. Showing Amps on cell with petroleum jelly on the Magnesium - YouTube

I'm using water that contains Epsom salt and salt substitute, both salts are very corrosive when combined with water and that's why i try to avoid water when it came to making the glue cells. I use Magnesium Ribbon because it will corrode faster than any form of magnesium but so far its not corroding and the control cells are showing corrosion. The control cells are corroding and the jelly on magnesium cell is not corroding so it looks good so far. I'm getting under 1mA which is ok.

My idea is since petroleum jelly rejects water away it does so by pushing the oxygen molecule in water away and in doing so the oxygen doesn't react with the magnesium to form magnesium oxide which is not conductive and breaks apart. Magnesium corrodes into magnesium oxide which is not conductive and is a powder, the reason why magnesium breaks apart is due to it becoming magnesium oxide which is a powder. Jbigness5 has made a good point, it could be the oxygen that corrodes the metal and since water contains the oxygen than the electrodes are corroding away. Combine water with the oxygen in the air and you get a good bit more corrosion. On some corrosion testing i've done on magnesium it would corrode first at where the water meets the air, so water and oxygen or mostly oxygen is a bad cookie.
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