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post #1 of 54 Old 10-02-2016 Thread Starter
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Zinc recommendations?

I need to buy a bunch of zincs, because I'm out. At the start of each season I have always put 2 on the propshaft, and have at least 2 in reserve.

I've tried a bunch of different sacrificial zinc anodes on my prop shaft over the years. Some have been better than others. In particular, I liked the one that had a copper (or maybe it was brass?) core, which provided the electrical contact with the shaft, and provided reinforcement to the mounting screws. The problem is I cannot remember what brand that particular zinc was...

So I went shopping, and find that prices for Zincs (NOT including Aluminum or Magnesium) are all over the place.
Prices from Amazon for a 1" (common to many sailboats) zinc anode are as follows:
  • Martyr - $14.59 FREE shipping = $14.59
  • B&S - $13.97 + $4.94 shipping = $18.91
  • Technoseal X3 - $10.68 FREE shipping = $10.68
  • Sea Shield - $7.63 + $5.49 shipping = $13.12
  • X-3 Zimar - $8.19 + 8.88 shipping = $17.06

and JD offers the Camp X3, which "Offers copper contact for permanent ground..." for $8.28 - I am thinking that this may be the one that I liked.

I also ordered a Bossler & Sweezy zinc a couple years ago. At the time it was $17.00 plus shipping.

Which brands of sacrificial ZINC anodes am I missing? Is there one brand of sacrificial zinc that you prefer?

Thanks in advance!


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post #2 of 54 Old 10-02-2016
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Re: Zinc recommendations?

boatzincs.com
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post #3 of 54 Old 10-03-2016 Thread Starter
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Re: Zinc recommendations?

... and your preferred zinc is; which?


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post #4 of 54 Old 10-03-2016
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Re: Zinc recommendations?

I have a European shaft with a metric thread so I take what I can get here in the US. I have Isotherm SP refrigeration so I buy the only zinc available for those. I don't have a lot of choices.

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post #5 of 54 Old 10-03-2016
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Re: Zinc recommendations?

I have installed many, many thousands of anodes over the course of my 22 years as a hull cleaner. I only use Reliance anodes. Made in Canada to U.S. mil spec, they are the best you can buy, IMHO.

I haven't had the opportunity to use all of the other brands mentioned, but here are my opinions on those I have:

1.- Martyr. Made in China. That alone is enough to make me avoid them. This brand also has the BB insert for a supposed better electrical connection. I believe that not only does the BB actually hinder the proper seating of the anode on the shaft, but I like to think that a part this simple can be manufactured to tolerances that allow for good contact.

2.- Camp. Utter garbage. I wouldn't use these anodes on my worst enemy's boat.

3.- Sea Shield. Good stuff, made in California. The only reason I don't buy them is that the fasteners tend to be hard to drive and when you're underwater, that's an issue.
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post #6 of 54 Old 10-04-2016
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Re: Zinc recommendations?

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Originally Posted by Fstbttms View Post
I only use Reliance anodes. Made in Canada to U.S. mil spec, they are the best you can buy, IMHO.
Interesting. Reading MIL-A-18001K there are three paragraphs of particular note (composition, dimensions, and testing).

Military specifications are in the public domain (except for some very few classified ones) and anyone can cite them. Martyr, which you don't think much of, are also built to the same spec. Of course that doesn't mean they actually MEET the spec since there is no testing unless being sold to someone like the U.S. government who either contracts for the testing or does it themselves.
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post #7 of 54 Old 10-04-2016 Thread Starter
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Thanks to both of you for feedback, and opinions. This is the kind of feedback I was hoping to receive. I can't like your posts from my phone, but will when I return to my pc.
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post #8 of 54 Old 10-04-2016
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Re: Zinc recommendations?

Quote:
Originally Posted by eherlihy View Post
Some have been better than others. In particular, I liked the one that had a copper (or maybe it was brass?) core, which provided the electrical contact with the shaft, and provided reinforcement to the mounting screws. The problem is I cannot remember what brand that particular zinc was...
Godfrey..
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post #9 of 54 Old 10-04-2016 Thread Starter
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Re: Zinc recommendations?

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Originally Posted by Maine Sail View Post
Godfrey..
http://godfreyboatzincs.mybigcommerc...amlined-zincs/

HOLY PROPSHAFT, MAINE SAIL! $43.00 EACH!


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post #10 of 54 Old 10-04-2016
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Re: Zinc recommendations?

Quote:
Originally Posted by eherlihy View Post
Godfrey Premium Streamlined Zincs - Godfrey Boat Zincs

HOLY PROPSHAFT, MAINE SAIL! $43.00 EACH!
It says that Godfrey 1" shaft zincs ships at 1 1/2 pounds each. $43.00

Performance Metals zinc from Defender ships at .35 pounds $7.99

Martyr ships from defender at .85 pounds. $12.99

Martys collar type ships at 1.2 pounds. $12.99 (clearance price)

Mainesail, you get back here right now and explain this voodoo to me.
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