What do you mean?Whoever did that gets an A for imagination.
That works, except the OP is on freshwater.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.
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...In my 40 plus years of sailboat ownership I've never had a turnbuckle unscrew itself.
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.Remove the wire and use split rings or cutter pins and wrap with tape or put canvas around it.
Looks like galvanized wire to me. Has that dull gray lumpy look.Maybe zinc plated since only corrosion is where bends might have been made?