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Q: Aluminum can linings ( Answered 5 out of 5 stars,   1 Comment )
Question  
Subject: Aluminum can linings
Category: Science
Asked by: zundel-ga
List Price: $4.50
Posted: 08 Feb 2003 10:59 PST
Expires: 10 Mar 2003 10:59 PST
Question ID: 158837
What is used (if any)to "film" or "cover" the inside of aluminum cans so you
dont get that metally taste in your mouth whe you take a drink?
Answer  
Subject: Re: Aluminum can linings
Answered By: websearcher-ga on 08 Feb 2003 11:33 PST
Rated:5 out of 5 stars
 
Hi zundel:

After a lot of searching, the best description of this process that I
found was at:

The Aluminum Can Manufacturing Process
URL: http://www.cancentral.com/canc/nontext/manuf.htm
Quote: "Following application and curing of the exterior label
(lithography), the can is conveyed to a bank of spray machines that
spray the inside with an epoxy-based organic protective coating. The
inside coating is also cured by forced hot air. The coating prevents
the beverage from contacting or reacting with the metal in the can
body even though aluminum is a relatively nonreactive material. Both
the exterior overvarnish and the interior protective coating are made
with water-based materials to prevent harm to the environment."

I hope this helps! Let me know if you need any clarification. 

websearcher-ga


Search Strategy (on Google):

inside coating "aluminum cans"
coating "aluminum cans"
cans aluminum epoxy-based organic protective coating
"aluminum cans are made"
"how are aluminum cans made"
zundel-ga rated this answer:5 out of 5 stars
Awsome research, appreciate it!

Comments  
Subject: Re: Aluminum can linings
From: taoshan-ga on 12 Feb 2003 09:32 PST
 
Contrary to the information given, Aluminium is relatively highly
reactive, being in a similar group of metals to magnesium. In fact, it
is this high reactivity that causes a very rapid reaction with any
available oxygen to form a protective coating of Al2o3 (Aluminium
Oxide) which gives aluminium its usable qualities in areas such as
cookware. Consider Thermite - a mixture of powdered Aluminium and Iron
Oxide: the reaction of these two chemiclas, when ignited using
magnesium, causes a heat high enough to melt steel.

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