[Antennas] Re: NEC-LIST: Copper oxide.

Mon, 12 Jan 2004 11:47:15 -0800

I think that the corrosion rate depends upon the difference in the electromotive force 
between the specific metal and its environment.   Dr Barry  Ornitz commented on 
the galvanic series of corrosion on one the the reflectors that I am on.

So I would look at the aluminum and copper first, are they alloys (more than likely) 
not pure metals and what was the other substance near to and what was between 
them.  Aluminum and zinc have long been used as sacrificial anodes to prevent 
corrosion. Copper alloys have long been used to withstand corrosion.  So more info 
is needed.

Chris opr VE7HCB

To:             	[email protected]
From:           	Dan Richardson <[email protected]>
Subject:        	[Antennas] Re: NEC-LIST: Copper oxide.
Date sent:      	Mon, 12 Jan 2004 06:50:45 -0800

At 06:01 AM 1/12/2004, Doug wrote:
>A point about aluminum; it corrodes a lot more slowly than
>copper.

I don't think so. Up here, near the sea, on the northern California
coast aluminum's life outside, exposed to the weather, is very short
where, on the other hand, copper flashings and the like last a very
long time.

Danny, K6MHE

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