Any thoughts on why this is corroding?

Jul 7, 2024
60
Catalina 27 Lake Keowee
Turnbuckle from CatalinaDirect - should be stainless steel.
Mechanics wire - I thought stainless. Maybe not. Maybe zinc plated since only corrosion is where bends might have been made?
Inland lake.

I ordered some stainless mechanics wire.

Any alternate thoughts are appreciated.

turnbuckle_wire.jpg
 
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Likes: JBP-PA
Jun 17, 2022
268
Hunter 380 Comox BC
Wrong type of wire... Never seen a turnbuckle locked like that.... use monel wire or 316 tig welding rod.

We're the threads lubricated before fitting the turnbuckle?
 
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Likes: Charles Erwin

Tedd

.
Jul 25, 2013
791
TES 246 Versus Bowser, BC
Stainless wire is often 18-8 or 304, which aren't as corrosion-resistant as 316 (which the turnbuckle is probably made of). I think you can also get a little bit of galvanic reaction between them in a salt-water environment.
 
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Likes: mermike
Jan 11, 2014
13,054
Sabre 362 113 Fair Haven, NY
Stainless wire is often 18-8 or 304, which aren't as corrosion-resistant as 316 (which the turnbuckle is probably made of). I think you can also get a little bit of galvanic reaction between them in a salt-water environment.
That works, except the OP is on freshwater.

SS is still an iron product and I believe there can be residual iron on the surface of the SS that will rust. 18-8 and 304 can exhibit this. I'm sure a metallurgist could provide a much more in-depth explanation.

Not all SS rigging is 316. On freshwater boats 304 is often used which is more prone to showing rust stains.
 
Jun 2, 2004
3,566
Hunter 23.5 Fort Walton Yacht Club, Florida
It maybe stainless-steel safety wire, just not a high grade of stainless steel.

I'm trying to figure out the safety wire routing and I am baffled. It would certainly do the job but so would a simple loop or even a figure eight on each of the studs. I must be missing something.
 
Mar 26, 2011
3,748
Corsair F-24 MK I Deale, MD
The Catalina web site says the threads inside the turnbuckle are bronze to prevent seizing. They are chromed for appearance. The corrosion is at the first coupling after the stud leaves the bronze threads.

Common and harmless.
 

Joe

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Jun 1, 2004
8,215
Catalina 27 Mission Bay, San Diego
In my 40 plus years of sailboat ownership I've never had a turnbuckle unscrew itself. The wire is overkill, unnecessary and could be dangerous unless wrapped with tape. Cotter rings (or split rings) are the more common method. Cotter pins are also common, just make sure you only bend ONE leg back at 45 deg so it's easy to remove, then wrap with tape so sails and ankles aren't scratched.
 
Last edited:

jssailem

SBO Weather and Forecasting Forum Jim & John
Oct 22, 2014
23,348
CAL 35 Cruiser #21 moored EVERETT WA
The safety wire approach is a bit overkill. In 2015 this question was asked and answered.

 

dLj

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Mar 23, 2017
4,438
Belliure 41 Back in the Chesapeake
In my 40 plus years of sailboat ownership I've never had a turnbuckle unscrew itself.
Wish I could say the same. I was on a sail boat delivery where we almost lost the mast because there were no cotter pins in one of the turn buckles. When I inspected that turn buckle had almost totally backed out...

dj
 
Jul 7, 2024
60
Catalina 27 Lake Keowee
Remove the wire and use split rings or cutter pins and wrap with tape or put canvas around it.
The boat had cotter pins originally. It was a PITA to get them removed (for boat hauling). They bent and there is little room to install or remove. I'll never use cotter pins again. Mechanics wire is too easy and does the trick. Run the wire through one hole and down to the other then twist. I believe I found the idea on this forum.

Also, @Joe I don't see the safety issue compared to a pin. Both are metal and both have ends. The end of the wire is tucked away easily inside the turnbuckle and none of it moves (probably the same could be done for cotter pins). Tape could be good, but tape also covers up issues and traps moisture.

Maybe a ring would work, but I don't see a ring or a pin stopping the turning. If turnbuckles don't ever turn, then why bother with a safety mechanism. They can turn, that is why. Always place your bets in the right games.