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Old 02-04-2014, 07:08 AM   #21
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Interesting, didn't realize.

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Old 02-04-2014, 07:29 AM   #22
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Is Stainless Steel Really the Best Metal for Use in an Anchor? - Inside Practical Sailor Blog Article

Mixing and matching stainless steel and galvanized mild steel chain, shackles, and anchors is interesting from a galvanic corrosion point of view. Itís true that stainless steel becomes less noble when submerged, but the zinc galvanizing will be the least noble metal in the mix, and in salt water, its rate of electrolytic disappearance may be slightly increased. More of a concern however, lies in any stainless steel shackles and swivels that may show little sign of deterioration prior to catastrophic failure.

Looks like Practical sailor doesn't think the combo is that big of a deal.

Many people have used the combo with normal deterioration rates noticed (meaning links sitting in a pool of water in the anchor locker will be gone long before the links near the anchor). Most people don't anchor 365 days a year so it really depends on how much immersion time you really expect.

Based on the 20 or so articles on Stainless/galvanized steel galvanic corrosion I just read...the most I would see worrying about might be cutting the link or two next to the anchor off every couple of years. If I was anchoring enough to have that kind of deterioration...I'd probably be replacing the chain anyhow from normal abrasion issues on the galvanizing more so than the slight galvanic issue.
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Old 02-04-2014, 07:36 AM   #23
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Quote:
Originally Posted by Xsbank View Post
If you never get it wet, just polish it.
Lemme see, hot-galvanized chain and stainless steel immersed in salt water... No, nothing will happen, in fact, maybe I won't use zinc on my prop shaft anymore, it's getting too expensive anyway.

Glad I could amuse you, one last laugh before bed.
This is very minor issue as there is not enough of a voltage potential difference between galvanized steel and low 300 grade stainless to be much of a problem unless as Psneeld said, immersion is constant. The anode on your shaft is more to protect your manganese bronze propeller (around 35% zinc) than it is your shaft.
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Old 02-04-2014, 07:46 AM   #24
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Quote:
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This is very minor issue as there is not enough of a voltage potential difference between galvanized steel and low 300 grade stainless to be much of a problem unless as Psneeld said, immersion is constant. The anode on your shaft is more to protect your manganese bronze propeller (around 35% zinc) than it is your shaft.
My reading up on the subject also discussed rate of action being tied to the larger area exposed either cathode/anode, amount of direct contact (thus only the near link being an issue and not feet of chain), the grade of stainless as you say...and more.

Generally the consensus was zero to slight accelerated degradation of the galvanizing...possibly moderate but only in a few situations that were never really discussed what the different variables were.

But not one article I read that was directly marine related discussed a problem with galvanized chain and a stainless anchor.

My personal example is my galvanized anchor sits on a stainless roller that is constantly wet/salty from spray and yet I see no deterioration on the bottom of the anchor.

Scientifically accurate problem? yes..... Reality problem? no.....
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Old 02-05-2014, 06:50 AM   #25
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, immersion is constant

Every night, sometimes for months on end.
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Old 02-05-2014, 08:31 AM   #26
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, immersion is constant

Every night, sometimes for months on end.
But only for maybe 10% of cruisers and less than 1% of all boaters.

I seriously doubt 1 in 10 here anchor out for that long continuously...even the guys doing the loop or the snow bird run have their anchors out of the water for day long runs every day or so.

For those that anchor out a lot... they probably aren't going to risk a stainless anchor anyway.
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Old 02-05-2014, 09:59 AM   #27
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I have never seen a issue on any of the boats I have been on that had a stainless anchor and galvanized chain.

Is there no issue as the anchor and the chain are both grounded to earth?

Or is there less of a issue as when you are on the hook you are not tied to the electric grid thus less stray current?

Or is it as I suspect just not a big enough problem to matter?

HOLLYWOOD
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Old 02-05-2014, 10:49 AM   #28
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I have never seen a issue on any of the boats I have been on that had a stainless anchor and galvanized chain.

Is there no issue as the anchor and the chain are both grounded to earth?

Or is there less of a issue as when you are on the hook you are not tied to the electric grid thus less stray current?

Or is it as I suspect just not a big enough problem to matter?

HOLLYWOOD
Me too...and as I posted a bunch of web sites I went to said either it would be no big deal or it "might be" but so many variables made it difficult to say for a general statement.

I sure think worst case scenario is the first link or two might see accelerated de-galvanizing...but heck with NO stainless in my tackle and some links start deteriorating in a year or so for whatever reason and have to be touched up.
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Old 02-05-2014, 02:38 PM   #29
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Worst case scenario is you might have to re-galvanize your chain in 75 years if you left it in the water all that time.
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Old 02-05-2014, 03:39 PM   #30
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Put the Bruce on the bow. If you are in grass pull out the Danford. If you anchor a lot you need a spare anchor on board regardless of the type.
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Old 02-05-2014, 07:10 PM   #31
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The new shiny bruce is going on the boat iwill install the new roller. I am not to worried about the galvanized chain. Thank for all the input that helped me make up my mind
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Old 02-06-2014, 05:50 AM   #32
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iwill install the new roller

Some folks find the rubber rollers used in boat trailers are easy to fit to an existing bow setup.

So what if it only lasts 1000 uses?
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Old 02-06-2014, 07:46 AM   #33
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Quote:
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Guys, guys.

He can care less which anchor you THINK is better. He asked if it will fit in his pulpit that currently holds a Danforth.

We have 300+ threads arguing what's better but are kinda scarce on threads about the mechanics of changing types.
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Old 02-06-2014, 11:26 AM   #34
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jamie mac,
Ask the anchor manufacturers. They are very anxious for you to mount and use their product and most have hardware to accommodate.
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Old 02-07-2014, 06:15 AM   #35
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They are very anxious for you to mount and use their product and most have hardware to accommodate. __________________

The bow setup should have at least 2 roller sets , or
a single roller should fit which ever anchor is selected .

Many cruisers will carry a number of anchors to fit the situation and bottom.

WE carry numerous styles Danforth and Bruce , CQR , Northill , and a folding Herrishoff fisherman.

Overnight , storm , lunch hook and stern anchor all in different weights.
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Old 02-19-2014, 05:56 PM   #36
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Installed today fits really well

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