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Floating Aluminum Coins On Water

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Bedrock of the Community
DVCollector's Avatar
United States
10045 Posts
 Posted 01/05/2014  6:00 pm  Show Profile   Bookmark this reply Add DVCollector to your friends list Get a Link to this Reply
That's a nice fleet of coins!

Quote:
Aluminum is a highly reactive metal.

But aluminum quickly develops a layer of Aluminum oxide when exposed to air, retarding much of continued corrosion.
Should be ok in water for a short time--but I would not float an Al coin in mercury.
Edited by DVCollector
01/05/2014 6:02 pm
Pillar of the Community
nalaberong's Avatar
Canada
2805 Posts
 Posted 01/05/2014  6:04 pm  Show Profile   Bookmark this reply Add nalaberong to your friends list Get a Link to this Reply
I looked into the chemistry, and I don't think these coins are at too much risk.

One or two developed a hard-water stain (because I have really hard water), but that was where I hadn't dried them completely and let the water evaporate. Another rinse (and nothing more) got it off.
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ASLAN TVorlon's Avatar
United States
1234 Posts
 Posted 01/06/2014  8:35 pm  Show Profile   Bookmark this reply Add ASLAN TVorlon to your friends list Get a Link to this Reply
TOO much FUN! ! !

Floating-Aluminum-Coins-On-Water Floating-Aluminum-Coins-On-Water

figured the fish don't mind the water

Floating-Aluminum-Coins-On-Water
10 Francs, not bad.

I even dried them off after... Floating-Aluminum-Coins-On-Water

Ohhh I forgot my oriental stuff... I think I'm gonna like this new hobby.
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NJ Bob's Avatar
United States
655 Posts
 Posted 01/06/2014  9:09 pm  Show Profile   Bookmark this reply Add NJ Bob to your friends list Get a Link to this Reply
Sir Bedevere: There are ways of telling whether she is a witch.

Peasant 1: Are there? Oh well, tell us.

Sir Bedevere: Tell me. What do you do with witches?

Peasant 1: Burn them.

Sir Bedevere: And what do you burn, apart from witches?

Peasant 1: More witches.

Peasant 2: Wood.

Sir Bedevere: Good. Now, why do witches burn?

Peasant 3: ...because they're made of... wood?

Sir Bedevere: Good. So how do you tell whether she is made of wood?

Peasant 1: Build a bridge out of her.

Sir Bedevere: But can you not also build bridges out of stone?

Peasant 1: Oh yeah.

Sir Bedevere: Does wood sink in water?

Peasant 1: No, no, it floats!... It floats! Throw her into the pond!

Sir Bedevere: No, no. What else floats in water?

Peasant 1: Bread.

Peasant 2: Apples.

Peasant 3: Very small rocks.

Peasant 1: Cider.

Peasant 2: Gravy.

Peasant 3: Cherries.

Peasant 1: Mud.

Peasant 2: Churches.

Peasant 3: Lead! Lead!

King Arthur: An aluminum coin.

Sir Bedevere: ...Exactly. So, logically...

Peasant 1: If she weighed the same as an aluminum coin... she's made of wood.

Sir Bedevere: And therefore...

Peasant 2: ...A witch
Bedrock of the Community
DVCollector's Avatar
United States
10045 Posts
 Posted 01/06/2014  10:06 pm  Show Profile   Bookmark this reply Add DVCollector to your friends list Get a Link to this Reply

Quote:
King Arthur: An aluminum coin.
Sir Bedevere: ...Exactly. So, logically...
Peasant 1: If she weighed the same as an aluminum coin... she's made of wood.
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ASLAN TVorlon's Avatar
United States
1234 Posts
 Posted 01/06/2014  10:51 pm  Show Profile   Bookmark this reply Add ASLAN TVorlon to your friends list Get a Link to this Reply
I've got a popcorn bowl that is about 2 foot across got to wait until the water would not freeze because I'm not doing it inside and frozen water would not count! But I think I can get a few dozen floating on that one.

Edit: just found this...


Quote:
American Elements' AE Bullion™ group mints certified high purity Lead Coins from laboratory certified engineered materials with properties applicable to chemical vapor deposition


LEAD COINS, now all I need is a hammer...
Edited by ASLAN TVorlon
01/06/2014 11:04 pm
Bedrock of the Community
DVCollector's Avatar
United States
10045 Posts
 Posted 01/07/2014  12:58 pm  Show Profile   Bookmark this reply Add DVCollector to your friends list Get a Link to this Reply
I'm sure a lead coin would float if you made it thin enough.
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