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 Battery Info and Questions
 corrosion of alum battery
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sucahyo
Average Member


Indonesia
246 Posts

Posted - January 14 2014 :  04:56:04  Show Profile  Visit sucahyo's Homepage Send sucahyo a Private Message  Reply with Quote
I do not know the exact claim of the benefit of alum battery, but I think one of them is less corrosion.

Few days ago I boil a mix of water and ammonium alum. The alum water end up corroding the metal cup badly:


I believe that alum battery can be a big scam.

But, maybe the battery corrode different way. Boiling acid water will dissolve the metal, but we see battery terminal corrosion. It seems acid battery make the part not submerged in acid to corrode. Alum battery would make the part submerged in alkaline to corrode.

I think alum battery will produce much worse corrosion on battery.

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kcarring
Moderator



Canada
1057 Posts

Posted - January 14 2014 :  19:59:07  Show Profile Send kcarring a Private Message  Reply with Quote
Right from the get go when John Bedini introduced his alum battery video's I began posting my views from a chemical point of view.

Let's look at the two.


Battery Acid (H2SO4)




Alum (AlKO4S)




You guessed it. Add water and you have battery acid. That simple.
Refer to the right hand side, about half way down:

You must be logged in to see this link.

Quote:
"Aluminum Sulfate may react with water to form corrosive Sulfuric Acid. For more information refer to the safety sheet for Sulfuric Acid"


John Bedini is truly out of his element whenever chemistry enters the argument.



~~~~~~~~~~~~~
You wouldn't laugh at my igloo if you knew how cold my beer is!

Edited by - kcarring on January 14 2014 20:06:17
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sucahyo
Average Member



Indonesia
246 Posts

Posted - January 14 2014 :  20:54:25  Show Profile  Visit sucahyo's Homepage Send sucahyo a Private Message  Reply with Quote
Thanks. charging (cooking) the battery may still produce sulfate gas too.

Anyone who try report less capacity too.

Alum battery is not safer, corrode more and has less capacity.
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Edited by - sucahyo on January 14 2014 20:55:12
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