Condenser coil corosion

Does anyone know of a good web-available white paper on the causes of aluminum fin corrosion on commercial air conditioning condensing units?
Not coastal location related; units are in central Florida.
Thanks.
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Living in NY, corrosion isn't as much an issue. However, we do have a lot of dust, dirt, and cottonwood fluff that clogs them.
You probably already DAGS.
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Christopher A. Young
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On Fri, 31 Jul 2009 10:52:28 -0400, John Hinson
I see things haven't changed here. I ask a legitimate question and get ridiculed.
"Waste my time once, shame on you. Waste my time twice, shame on me."
Newsgroup deleted.
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On Sun, 02 Aug 2009 19:30:14 -0400, John Hinson

    Another satisfied customer ! :-)
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John Hinson wrote:

Sorry John, Usenet is a lot like middle school. Ask an esoteric question that taxes the mental abilities of the group and the kiddies will tease you. Try this link:
http://tinyurl.com/nuefqy
TDD
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John Hinson wrote:

We are deeply honored by your deletion. It makes our day to know that our Security team has done such an excellent job of repelling riffraff.
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Do a CAT scan to check for piss on the unit.
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It is a case of disimilar metals and on the coast with electrolyte like salt the fins rot away. There are other electrolytes besides salt so maybe take a look at what kind of industry is up wind.
Now other causes I have seen, and this happened on a copper tube - copper fin coil was from electromagetism, roof top units and their close proximity to mutilple overhead power services.
If the units are on the ground then it is also the case of good old fashioned dog piss
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