Electrolysis (Stray Current) Damage and Hull Prep - E09

In this episode I examine the electrolysis damage to the hull which resulted from a few stray currents from the DC system. I also start the prep work to repair and repaint the hull below the water line.
Follow me on Instagram for live progress updates @rescue_boat_revival
Boat Specs Royal National Lifeboat Institute
Class: Waveny Class Lifeboat 44-004
Built: 1967 at Brooke Marine Lowestoft, UK
Original Engines: 2 x 215hp Cummins V6
Current Engines: 2 x 210hp Caterpillar 3208 (Repowered 1982)
Construction: Corten steel hull with aluminium decks and superstructure
Length: 13.62m (44ft 8in)
Beam: 3.84m (12ft 7in)
Draft: 1.19m (3ft 11in)
Displacement: 17 ton
Speed: Cruise 10 knots. Sprint 15.5 knots
Designer: US Coast Guard. RNLI Modifications
Rescue History Dover, UK: 1967 - 1979, Launches 202, Lives saved 140
Relief, UK: 1979 - 1984 , Launches 49, Lives saved 18
Holyhead, UK: 1984 - 1985, Launches 25, Lives saved 26
Relief, UK: 1985 - 1997, Launches 98, Lives saved 28
Coffs Harbour, NSW, Australia: 1997 - 2008, Lives saved unknown
Fremantle, WA, Australia: 2008 - 2019, Converted to line boat/tug
Claremont, WA, Australia: 2019 - present, Converted to recreational vessel

[@jeffreyostrom2803]

With this process works for an aluminum boat

[@conda555]

Was taking all the brass and non stainless screws out of my tinny and doings some maintenance. Was definitely hot😅 cheers for the tips

[@Ozzierob]

Great video man. Cheers

[@davidlane1137]

Whether AC or DC all electricity leaves the source goes to the load (or wrong path) and goes back to the source. There is no AC trying to get to ground. It usually uses the ground path to get back to the source in a fault condition as with AC the safety ground is bonded to the neutral wire at the source. (Transformer on a pole near the marina.) In a marina a fault with an AC current to a metal hull means AC in the water and potentially electric shock drowning. BTW Bonding systems have one major flaw, they make a great path for stray current corrosion, on non-metal boats.

[@062241kdp]

Why did you tape all the welds with blue tape? Couldn’t you avoid those welds without the tape?

[@SVJoana]

Why didn't you show what tools you used to clean the paint off? I also have a steel boat, and there are lots of options. The best one I've seen, short of dry sandblasting, is to use a drill and a Dutch produced tool called a TERCOO. You should check it out. Using a grinder does not give you a good profile for paint to adhere, the metal is too shiny.

[@blakelieschke14]

That’s what I actually used. It’s in my next video :)

[@diverd2162]

The word "Electrolysis" is mistakingly used when talking about corrosion it should be termed as electrolytic corrosion or stray current corrosion. Electrolysis is when you used electricity as a tool for a specific purpose of removing body hair.