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Go Back   SailNet Community > Out There > Destinations > Chesapeake / Central US east coast > Chesapeake Bay > Zinc Or Aluminum Anodes On Mid Chessie
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Thread: Zinc Or Aluminum Anodes On Mid Chessie Reply to Thread
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Topic Review (Newest First)
09-11-2013 04:25 PM
aa3jy
Re: Zinc Or Aluminum Anodes On Mid Chessie

Quote:
Originally Posted by swampcreek View Post
As I was about to order a prop anode for our boat I saw 3 choices, zinc, aluminum and magneseum. I know mag is strictly fresh, I've always used zinc and never gave it a second thought but in reading up on it I see aluminum alloy is recomended for brackish water which is what the mid Chessie is. Now I'm thinking on ordering the prop anode in aluminum as well as replacing the shaft zincs with aluminum as well. So now it's time to dip into the wealth of knowledge here and ask for input and experience. Any thoughts?
Reviving this old post. Those that used aluminum this year instead of the traditional zinc sacrificial anodes..any difference noted so far?
03-17-2013 03:53 PM
aa3jy
Re: Zinc Or Aluminum Anodes On Mid Chessie

Quote:
Originally Posted by swampcreek View Post
Maybe it's cabin fever but people seem a little touchy.
Yep!
03-17-2013 12:53 AM
swampcreek
Re: Zinc Or Aluminum Anodes On Mid Chessie

I received in the mail and installed my aluminum anodes this past week, BIG difference in weight (Not that the weight difference will result in anything). From all the technical articles I read this is the best choice in brackish water. I should have posted this in the general Interest to get a bigger audience and see what some of the response would be out of our area. I think it might be a good idea to research a subject first instead of just throwing it out here on Sailnet. Maybe it's cabin fever but people seem a little touchy.
03-14-2013 01:06 PM
BubbleheadMd
Re: Zinc Or Aluminum Anodes On Mid Chessie

Good Old Boat has an awesome article on building your own galvanic isolater this month.
03-11-2013 04:55 PM
chucklesR
Re: Zinc Or Aluminum Anodes On Mid Chessie

Quote:
Originally Posted by Fstbttms View Post
You are somebody's neighbor too. Using your logic, that means you are the source of his problems.

When it comes to rapid zinc depletion and corrosion problems, everybody likes to blame the other boats around him. My experience, however, is that the most likely source for these issues is to be found aboard your own boat. That's where you should look first.

BTW- "electrolysis" is not something floating in the water. Further, it is not even the correct term for a common form of metal corrosion in boats.

Actually, I've never had a boat in a marina, so no - I'm not someone else's source, ever.

I agree, I should have said galvanic corrosion when speaking of zinc vs aluminum, not electrolysis.
HOWEVER - What I really meant was stray current corrosion, which is why I advised getting an isolator for that. (it was a early morning post).

Here's a article that backs up my "other boat" claim says that the main source of it is from leaks further away, not on your own boat.
BoatUS - BoatTech - Types of Marine Corrosion

Page down to the stray current paragraph.
03-11-2013 04:32 PM
swampcreek
Re: Zinc Or Aluminum Anodes On Mid Chessie

Quote:
Originally Posted by PalmettoSailor View Post
Well, I'm fairly passonate about not making my life harder by creating problems where they don't exisit, but that's just me.
As I originally posted I wanted input, I would be interested in reading any technical data where going with aluminum anodes in brakish water is creating problems or where zinc anodes are superior.
03-11-2013 04:27 PM
swampcreek
Re: Zinc Or Aluminum Anodes On Mid Chessie

Quote:
Originally Posted by T37Chef View Post
@swampcreek...not sure why you asked in the first place because it seems you already had your mind made up?
At the time I first posted I had just decided to look into the option of aluminum anodes further. I also started researching into it elsewhere, with the technical data I have found I have indeed made up my mind that this is the best choice for me, others may come to the same conclusion. I'm not saying anyone else is wrong for using zinc. If I had to go into the water right away and couldn't wait for aluminum anodes to be shipped then I'd be going with the zincs as well and deal with changing over later. I asked for input and experience. Being that the majority of this site is supposed to be about sailors helping sailors I believe this a legitimate subject to explore, however the tone here seems to have become a little more charged than I would expect over such a subject.
03-11-2013 01:19 PM
T37Chef thanks Dave ...because I have about 4 years worth of zincs for my autostream prop, at about $30 per...and I should not mix zinc and aluminum ...I will be sticking with zinc for at least the next 4-5 years.

@swampcreek...not sure why you asked in the first place because it seems you already had your mind made up?
03-11-2013 12:23 PM
PalmettoSailor
Re: Zinc Or Aluminum Anodes On Mid Chessie

Quote:
Originally Posted by swampcreek View Post

You seem pretty passionate about using zinc and thats fine, we all do our own thing!
Well, I'm fairly passonate about not making my life harder by creating problems where they don't exisit, but that's just me.
03-09-2013 02:47 PM
Fstbttms
Re: Zinc Or Aluminum Anodes On Mid Chessie

Quote:
Originally Posted by chucklesR View Post
Far more damage is caused by your neighbor's boat's leaking current than by simple electrolysis in the water.
I say neighbor's boats because that's the way it works out - they are worse for you than your own boat.
You are somebody's neighbor too. Using your logic, that means you are the source of his problems.

When it comes to rapid zinc depletion and corrosion problems, everybody likes to blame the other boats around him. My experience, however, is that the most likely source for these issues is to be found aboard your own boat. That's where you should look first.

BTW- "electrolysis" is not something floating in the water. Further, it is not even the correct term for a common form of metal corrosion in boats.
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