I just ordered all new standing rigging for my P-18 from Salty Dog Marine. All the wires they use for standing rigging is vinyl coated. I was a little concerned since I had read that the coating could trap water inside and cause corrosion, so I asked Salt Dog Marine if the vinyl coating should/could be stripped off the wires. This is the response I received (paraphrased to save space).
Salty dog wrote:
Steve,
We are not sure why you would want to strip the vinyl. In the case of the shrouds it protects your main sail and your crew when they are on the trapeze wires. You can use a sharp utility knife to strip the vinyl but we would advise against it.
After expressing more concerns about corrosion I received this message:
Salty dog wrote:
No. Corrosion in rigging only happens when you have two dissimilar metals. In the case of your rigging electrolysis (corrosion) will occur where the stainless steel rigging, and thimbles, are nicro pressed with compression sleeves that are nickel coated copper. Leave the vinyl on and rinse the rigging with fresh water when you are done sailing.
I replied with this:
Steve wrote:
I understand about galvanic corrosion (dissimilar metals) but SS hardware can also corrode other ways (pitting, stress corrosion cracking,etc)? Stainless Steel requires a thin oxide coating to develop on the surface to help protect against corrosion. It requires an oxygen supply for this to happen. If salt water was to displace the oxygen inside the vinyl coating the protective film would not be in place and corrosion would develop at an accelerated rate, and being covered it wouldn't be noticeable until a failure occurred. Also inside the coating the wires would be rubbing against each other and chafe which would also destroy the oxide coating. In fresh water application it shouldn't be such a problem. Hope this makes sense.
I am all ears if I have my facts wrong.
Thanks,
Steve
Salty dog wrote:
In 27 years of business sold a lot of rigging to salt water sailors and in 48 years of racing raced a number of times in salt water. Never had a wire break in the middle nor heard of a wire breaking in the middle from corrosion. A lot of broken end fittings. Could be wrong.
Also:
Look at it this way. None of the major manufacturers would leave the coating on if they thought the wire would fail. Hobie Cat especially is a target for every lawyer in the world. Further, chances are your boat is about 20 years old, based roughly on when they stopped making them,
and it probably has the original wires on it.
We recommend that you change the wires about every 6-7 years for salt water boats but I have been to many regattas where the old east and west coast boats (salt water) still had the original wires. Rinse the ends off with fresh water, go sailing.
Have a great night.
Salty Dog Marine
My hat goes off to Salty Dog Marine for taking the time and effort to address my concerns. Their answers make sense to me. I'll definitely be buying items from them again in the future! Just wanted to share this info with others beachcats owners. I hope it clears the air a little bit about the standing rigging coatings.
Thanks,
Steve