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Frogwatch[_2_] Frogwatch[_2_] is offline
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First recorded activity by BoatBanter: Nov 2008
Posts: 1,525
Default Bronze corrosion

On Sep 3, 10:24*am, Frogwatch wrote:
On Sep 3, 10:02*am, Frogwatch wrote:



On Sep 3, 7:15*am, (Richard Casady) wrote:


On Wed, 2 Sep 2009 20:03:04 -0700 (PDT), Frogwatch


wrote:
Today, I dug out the old bronze prop whose blade edges were so
depleted of zinc


What kind of bronze contains zinc? Brasses are copper/zinc alloys,
bronzes are mostly copper/tin. Disappearing zinc is why brass is not
used in many applications.


Casady


OK. 'twas a late night brain freeze but the bronze is wasted and
corroded somehow.


Actually, marine bronze contains 9-10% aluminum which is even worse
than Zn. *I do not have shore power so I can only assume someone else
has bad wiring. *Right now, I am combatting this by having the diver
replace my zinc every 4 months but I will move my boat soon.
So, what do people think about my making the strut?
HK, you are incapable of giving useful input so please do not respond


I would not do the brazing or welding, I'd pay to have it done. I
admit, there are some things it simply takes too long to learn.