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Posted by Spiderman (Member # 1609) on September 14, 2004, 19:11:
 
An article from Popular Science about Rusting Aluminum, pretty interesting I thought.

http://www.popsci.com/popsci/h20/article/0,12543,693558,00.html

Make sure to view the video of the rusting aluminus that they provide, link here as well:

http://www.popsci.com/popsci/video/0,21644,725807,00.html
 
Posted by Dr Cyclops (Member # 986) on September 14, 2004, 19:40:
 
I read Grey Matter first thing whenever I get a new PopSci. Our Aluminum Oxide supply worries are over!
 
Posted by Callipygous (Member # 2071) on September 15, 2004, 20:17:
 
I wonder how long before some terrorist group tries this. It seems a simple way to get aeroplanes to fall out of the sky.
 
Posted by Cap'n Vic (Member # 1477) on September 15, 2004, 21:13:
 
America hater [Wink]
 
Posted by illuminatus (Member # 2187) on September 15, 2004, 22:22:
 
yeah but if you look in that video they scratched off the already oxidized area of the metal and applied the mercury to an unprotected area.
 
Posted by Tandoc (Member # 3004) on October 09, 2004, 07:52:
 
call me stupid or pedantic, but I thought only iron rusts, and other metals just oxidize? =d
 
Posted by dragonman97 (Member # 780) on October 09, 2004, 13:28:
 
quote:
Originally posted by Callipygous:
I wonder how long before some terrorist group tries this. It seems a simple way to get aeroplanes to fall out of the sky.

Yeah, I discussed this with someone when they first told me of this article - it would be kind of tricky to get anything on the *outside* of the airplane. The odds of getting anything all the way through the inside to the outside is quite slim, and if this is as fast acting as I hear, if someone got something on the outside of the plane - while on the ground, as I don't see it feasible to do otherwise (by a person, anyway) - the plane would never leave the ground, as someone would surely notice a lack of structural integrity. They'd really notice if the whole wing was sitting on the ground next to the plane [Wink] .
 
Posted by ooby (Member # 2603) on October 09, 2004, 18:43:
 
quote:
Originally posted by Tandoc:
call me stupid or pedantic, but I thought only iron rusts, and other metals just oxidize? =d

Aluminum also "rusts" naturally. However, when our friend Al is exposed to oxygen and oxidizes, it the Aluminum Oxide forms a protective "paint" about the surface of the metal. When the metal is cut, it is unprotected, but, eventually, it will oxidize as well.

There are other metals that rust as well. Maybe even all of them It's been a few years since chemistry, so i might not be 100% correct about this.

Also, the page has been "404'd."
 
Posted by -ct- (Member # 209) on October 10, 2004, 12:29:
 
quote:
Originally posted by ooby:
...
Also, the page has been "404'd."

http://www.popsci.com/popsci/how2/article/0,20967,693558,00.html

" In crystal form, aluminum oxide is called corundum, sapphire or ruby (depending on the color),.. "

i had no idea!
 
Posted by Xanthine (Member # 736) on October 10, 2004, 13:08:
 
<pedantic chemist>
Actually it's the impurities in the carondum that give ruby and sapphire their color. Pure carondum is colorless.
</pedantic chemist>

Better call the Department of Homeland Security and tell them to lock down all stockpiles of mercury and ban thermometers and barometers...
 
Posted by Mr Bill (Member # 553) on October 17, 2004, 01:18:
 
I thought it was "carborundum", or is that just a tradename on sandpaper?

Or am I just completely wrong?
 
Posted by Tandoc (Member # 3004) on October 17, 2004, 02:16:
 
quote:
Originally posted by ooby:
Aluminum also "rusts" naturally. However, when our friend Al is exposed to oxygen and oxidizes, it the Aluminum Oxide forms a protective "paint" about the surface of the metal. When the metal is cut, it is unprotected, but, eventually, it will oxidize as well.

There are other metals that rust as well. Maybe even all of them It's been a few years since chemistry, so i might not be 100% correct about this.

I'm not sure if langage has evolved further yet, but orignally, rust just another term for oxidized iron =__=

http://dictionary.reference.com/search?q=rust
 
Posted by TheMoMan (Member # 1659) on October 17, 2004, 12:35:
 
RUST, RUSTY--------I first heard these terms when I was a lad on my Grandma's farm, and used to discribe the condition of the cattle feed. Don't feed the cows rusty corn or silage be sure to look at all of the silage. Years later I learned about rusty Iron & Steel and other oxidized metals. There are evan references to rust in the Bible if you care to look.
 


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