Dave August wrote:
They are coated on the inside.

But that coating doesn't work forever.

I lost track of a six pack of Pepsi cans hiding at the back of a kitchen
cabinet for a maybe two years.

When I went to pull it out the cardboard carton was stuck to the cabinet
floor and after I peeled it off it was apparent that a couple of the
cans had leaked. They weren't completely empty, but a lot lighter than
the others.

I autopsied one of the cans and the inside looked like this:

http://home.comcast.net/~jwisnia18/temp/pepsi_hole.jpg

The hole the arrow is pointing at went right through the aluminum, you
could see a pinpoint of light through it.

I called Pepsi's customer service about this to see if it was maybe an
anomaly and the nice gal I spoke with said that kind of leakage was far
from unheard of and it's one reason why they put expiration dates on
their products.

So, plastic bottles let the CO2 leak through their walls in a few months
and go flat, aluminum cans corrode through like mine did, and you can't
hardly find many kinds of carbonated non-alcoholic beverages in glass
bottles anymore. That's progress???

Jeff
--

Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.98*10^14 fathoms per fortnight.

--.- Dave

"Joe AutoDrill" wrote in message
news:xQtOi.5701$j14.3728@trnddc06...

I *think* I know the answer to this so it may be trivia... But if I don't,
or someone proves me wrong, then I'll call it a learning experience.

So... Why don't aluminum cans disintegrate from constant exposure to the
acids and salts in various sodas and drinks they contain?

Regards,
Joe Agro, Jr.
(800) 871-5022
01.908.542.0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

V8013-R