[C320-list] Zinc Or Aluminum Anode For Mid Chesapeake?

[marshall at merry-thought.com]

   I just purchased my zinc (zincs) for the season.  Visited Fawcetts in
   Annaoplis, couldn't buy an aluminum sacrificial anode if I wanted to.
   An old salt in the store whose lead keel weighed almost as much as a
   c-320 could not understand why you would want to buy an anode more
   noble than  zinc which aluminum is.  I have sailed the Chesapake for 35
   years.  No problems with zinc.  Stick with what works.

   Marshall



   Marshall & Diane Lucas

   & The Merrythought Poodles

   SV Catalina 320 #`1037 Merrythought





   -------- Original Message --------
   Subject: Re: [C320-list] Zinc Or Aluminum Anode For Mid Chesapeake?
   From: Bruce Hunter <[1]swampcreek42 at yahoo.com>
   Date: Wed, March 06, 2013 9:47 pm
   To: "[2]C320-List at Catalina320.com" <[3]C320-List at Catalina320.com>
   OK, I believe I have it down. On the Chesapeake from the head to just
   North of Baltimore is considered "fresh"Then there are 3 classes of
   brackish below that point. It is Oligohine where the salinity is .5 to
   10 ppt (parts per thousand) is from north of Baltimore to the Bay
   Bridge. It is Mesohaline (salinity 10.7-18.0ppt) from the Bay Bridge to
   the Rappanannock (medium salinity). It is Polyhaline (18.7-36ppt)  from
   the Rappohannock to the ocean (36ppt is ocean water). So if Aluminum
   alloy anodes are made for brackish water the Chesapeake is definitely
   the place to use them.  Also, I read a zinc anode can form a layer of
   zinc oxide insulating itself, then the protected metal will
   deteriorate. So upon reading this I've ordered all aluminum
   alloy anodes (Non Chinese) and will put on our boat.

   Bruce
   Nauti Time #719
   From: Tony Murphy <[4]tony at midwestphysics.com>
   To: "[5]C320-List at Catalina320.com" <[6]C320-List at Catalina320.com>
   Sent: Wednesday, March 6, 2013 5:05 PM
   Subject: Re: [C320-list] Zinc Or Aluminum Anode For Mid Chesapeake?
   Geesh... I've heard it all now!!
   Does this manager have a clue? Does he realize that Zinc and Magnesium
   are the environment???  These are naturally occurring elements...
   Tony
   Bella Sol #886
   Sent from my iPhone
   On Mar 6, 2013, at 3:05 PM, Warren Updike <[7]wupdike at hotmail.com>
   wrote:
   > The manager at our store said aluminum is less damaging to the
   environment than are lead annodes. They are only stocking aluminum now.
   >
   > -----Original Message-----
   > From: Bruce [[8]mailto:swampcreek42 at yahoo.com]
   > Sent: Wednesday, March 06, 2013 1:56 PM
   > To: [9]C320-List at Catalina320.com
   > Subject: Re: [C320-list] Zinc Or Aluminum Anode For Mid Chesapeake?
   >
   >> From what I've been reading, the less conductive the water the less
   noble the anode should be so the order goes zinc, aluminum, magnesium.
   Zinc for salt, aluminum for brackish and salt, magnesium for fresh. I
   guess I might be reading into this too much but now I have to get to
   the bottom of it. Thanks for the tip on Chinese abides from WM, I'll
   remember that.
   >
   > Bruce
   > #719
   >
   > Marshall <[10]marshall at merry-thought.com> wrote:
   >
   >> Everyone that I know on the Chesapeake including myself use zinc. My
   boat is across from Annapolis. To my knowledge boaters in the Northern
   part of the bay use zinc. I would avoid the Chinese made Worst Marine
   zincs. I am going to check out Fawcetts. Defemder also sells non
   Chinese zincs.
   >>
   >> Marshall
   >>
   >> Bruce <[11]swampcreek42 at yahoo.com> wrote:
   >>
   >>> I was about to order a new anode For our FOF prop when I saw that
   >>> aluminum alloy is decided for brackish water. I used to just put
   zinc
   >>> on everything and not think twice but being that the mid Chesapeake
   is
   >>> brackish I'm thinking that I should replace the prop AND shaft
   abides
   >>> with aluminum alloy. Any thoughts?
   >>
   >> --
   >> Sent from my Razor Max with K-9 Mail
   >>
   >> Marshall
   >>
   >> Marshall, Diane &
   >> The Merrythought Poodles
   >> SV C-320 Merrythought  #1037
   >
   >

References

   1. mailto:swampcreek42 at yahoo.com
   2. mailto:C320-List at Catalina320.com
   3. mailto:C320-List at Catalina320.com
   4. mailto:tony at midwestphysics.com
   5. mailto:C320-List at Catalina320.com
   6. mailto:C320-List at Catalina320.com
   7. mailto:wupdike at hotmail.com
   8. mailto:swampcreek42 at yahoo.com
   9. mailto:C320-List at Catalina320.com
  10. mailto:marshall at merry-thought.com
  11. mailto:swampcreek42 at yahoo.com