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

Mon, 12 Jan 2004 15:10:23 -0500

A quick check on google confirmed my concept that corrosion is based upon
chemical reaction.  Aluminum was divided into 9 categories depending upon
the other metals/chemicals mixed with the basic aluminum to form the alloy
desired. The type of allow influenced the corrosion problems possible.

I asked google for corrosion aluminum and copper and got a number of sites
to check.   Take a look.

73/Jim/AC4CZ

----- Original Message ----- 
From: "Chris BONDE" <[email protected]>
To: "Dan Richardson" <[email protected]>; <[email protected]>
Sent: Monday, January 12, 2004 2:47 PM
Subject: Re: [Antennas] Re: NEC-LIST: Copper oxide.

> 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
>
>
> - - -
>
> Your moderator for this list is:
> Larry Wilson KE1HZ [email protected]
> _______________________________________________
> Antennas mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/antennas
>
>
> - - -
>
> Your moderator for this list is:
> Larry Wilson KE1HZ [email protected]
> _______________________________________________
> Antennas mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/antennas
>