Comentarii la: Sail Life – Ieșire cu o surpriză urâtă 😬

De: Graham Wheelock

Graham Wheelock — Mon, 07 Nov 2022 23:52:00 +0000

Attach rudder strap to ground through 12 gauge solid copper wire place zinc on top of stainless run wire back to battery ground done deal

De: Simon Sargent

Simon Sargent — Mon, 07 Nov 2022 23:49:56 +0000

Good luck and safe sailing to you both xx

De: lexus1098r

lexus1098r — Mon, 07 Nov 2022 23:11:34 +0000

Can the stainless have functioned as an anode to the coppercoat?

De: carlostheflame

carlostheflame — Mon, 07 Nov 2022 21:58:32 +0000

Not all stainless is equivalent, even when it says it is… We've have 'guaranteed' 316 hose clamps fail at the screw, because the screw was from a different supplier. We've had 1000m pressure rated wet connects fail at the 316 fitting because the male end was isolated from the case (which had zinc placed far more regular than necessary) and the two parts, though both very expensive 'guaranteed' 316, were just "ever so slightly" not… If there is any dissimilar metals, the ocean will make a dielectric of some potential. Use teflon spacers and coated fasteners, the cheap route, or source all metal from a supplier that guarantees the steel properties. That used to be easy, but now you have to verify (going back to the hose clamps, same US vendor for years, then all the sudden). Or, just bite the really big bullet and use titanium everywhere!

De: Roy Ballantine

Roy Ballantine — Mon, 07 Nov 2022 21:56:30 +0000

Love your channel!

De: Steen E. Nielsen

Steen E. Nielsen — Mon, 07 Nov 2022 21:37:13 +0000

Hi Eva og Mads
I am very excited to hear how your propeller will look like in the future.

I consider myself to have invented the best product ever.

It is cheap, it does not pollute the environment and it is very easy to work with.

Clean the surface of the propeller.

Sanding the propeller so you can see yourself in it.

Boil a kettle of water and add a lot of salt.

Paint the propeller many times with the saltwater solution.

The propeller gets ugly, but that's the point.

The salt has drawn copper to the surface of the propeller, it has turned green.

No fouling.

Try it, it's almost free.

The product can also be sold in beautiful bottles, but then it becomes expensive!
Steen from back home in Skive

De: Torsten Behrendt

Torsten Behrendt — Mon, 07 Nov 2022 21:34:39 +0000

I wonder how long your prop paint withstands cavitation.

De: Arne Kvinge

Arne Kvinge — Mon, 07 Nov 2022 21:20:36 +0000

Somethings happenning to seawater when it gets hotter. More agressive. Stainless is not a good material. If its passivated it's around copper in the galvanic voltage sequence. If the warm seawater get it depassified it convert into an anode. My own experience with stainless steel parts as nippels and valves is they last about 3 months in the return plastic pipe from seawater coling to buildings. This is hotter than the intake water.

De: Swamp Boys Garage

Swamp Boys Garage — Mon, 07 Nov 2022 21:05:30 +0000

What grade of stainless was it made from? Make the next one out of 316 stainless and keep away any other type of metal from it. That will solve the problem.

De: Michael Marcinek

Michael Marcinek — Mon, 07 Nov 2022 20:32:10 +0000

Hi @Sail Life! We had a similar issue with the heel strap on our Island Packet 35, only ours was more severe. Our electrician noted that the pitting(or cratering) we had on 1 seacock and our heel strap, was a sure sign DC stray current corrosion. We had similar corrosive issues on our stainless steel bolts and washer which evaporated as your had. What we found was that one of our 2-0 ground wires started to fail which was putting a bit of resistance in our DC circuit. This caused stray DC Curren to flow out through our engine and prop, which became a giant cathode. Since our rudder post was bonded, as was 1 of seacocks (weirdly, the other two seacocks were left off of the bonding loop), they became the anode as the DC current used them as the path back to the source, our more specifically, our batteries.

Is your rudder post bonded? If so, you might want to poke around with a multimeter and check for the potential of a grounding issue, even if it is just for peace of mind.