[PVRCNC] Radials for 80m Vertical

[Joseph Mack NA3T]

On Tue, 22 May 2012, J A Ritter wrote:

> So, now comes the question - any reason why I
> couldn't use uninsulated aluminum wire?
.
.
> Would corrosion be an issue?  What I could find very 
> quickly on line about corrosion rates for buried metals 
> makes me think not.  Does anyone have any relevant 
> experience?

I don't have any experience, but I've know that galvanic 
corrosion

http://en.wikipedia.org/wiki/Galvanic_corrosion

is a problem between dissimilar metals. The standard 
potential between Cu and Al is 1.7V.

http://www.jesuitnola.org/upload/clark/refs/red_pot.htm

If you're going to use Al wire for radials, all of the 
antenna parts should be Al.

Ships have a block of Mg attached to the side to 
sacrificially corrode, instead of the Fe.

How much corrosion you'll get in ground (rather than sea 
water), I don't know

Joe

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
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