steve1963
Well-Known Member
I had a seriously corroded keel. I got the yard to sand blast it, and then prime immediately after. I then filled and faired with epoxy. So far, seems OK
filling and fairing cast iron keels
- Thread starter dunkelly
- Start date
convey
N/A
The relative angles of a splayed twin keel wouldn't make any difference?
Lead's about £1 per 1kg scrap, but I do know where a few disused churches are ... !
Lead plating is technically possible.
Could thermal/spray welding come into play anywhere here?It's technology used on large hydro-generators etc.
I would not try this while your keels were on your boat ...
rogerthebodger
Well-Known Member
Metal spray coating is an option for steel boats but must be done before fitting out and the cost can be high.
Grit blasting and epoxy coating is a comprise and if done correctly can last a long time.
My steel boat was grit blasted and coated with epoxy and epoxy tar on the outside below the waterline.
The only rust on my boat was as a result of my boat being damaged when the marina I was in broke up in a major storm which put scretched in the paint work down to the steel that would have holed a GRP boat.
The metal spraying of the inside of the boat is a compromise as metal boats generally rust from the inside not the outside.
Some pics on the link in my signature.
Grit blasting and epoxy coating is a comprise and if done correctly can last a long time.
My steel boat was grit blasted and coated with epoxy and epoxy tar on the outside below the waterline.
The only rust on my boat was as a result of my boat being damaged when the marina I was in broke up in a major storm which put scretched in the paint work down to the steel that would have holed a GRP boat.
The metal spraying of the inside of the boat is a compromise as metal boats generally rust from the inside not the outside.
Some pics on the link in my signature.
ghostlymoron
Well-Known Member
I don't think theres any treatment that will last forever. I did my bilge keels thoroughly the first year I had Anemone but still had a bit of touching up the following season. I then looked on it as an annual task but not arduous. It's not serious and won't result in significant loss of metal.
I used a knotted wire brush on my angle grinder, "cure rust" (or similar containing phosphoric acid), International Primocon, anti foul.
I used a knotted wire brush on my angle grinder, "cure rust" (or similar containing phosphoric acid), International Primocon, anti foul.
convey
N/A
You'd think if they can send a man into space, or probes off to Pluto, they'd be able to crack rusty keels.
I've been reading up on these electro-magnetic gadgets. It appears there is some evidence that they do actually work (ie academic), although there is clearly a whole heap of typical American marketing hyperbole surrounding them.
Logically, it sounds reasonable that they might, and a lot easier on boat where you're dealing with one or two big slabs of a single metal rather than multiple panels and differing alloys, and a fairly predictable electrochemical soup that they are hung in.
As to spray welding, which can work wonders on worn shafts etc, I was thinking more as an onsite application of a plating, as an alternative to trying to find somewhere to treat 500lbs of cast iron. It's also going to dry them out ...
Drop your keel/s, blast a layer of some other finer metal on them, grind flat, then treat as usual?
Never heard of it being done but that does not surprise me as not many people have heard of it, so this is on a "Priti Patel/Home Office brainstorming level".
I've been reading up on these electro-magnetic gadgets. It appears there is some evidence that they do actually work (ie academic), although there is clearly a whole heap of typical American marketing hyperbole surrounding them.
Logically, it sounds reasonable that they might, and a lot easier on boat where you're dealing with one or two big slabs of a single metal rather than multiple panels and differing alloys, and a fairly predictable electrochemical soup that they are hung in.
As to spray welding, which can work wonders on worn shafts etc, I was thinking more as an onsite application of a plating, as an alternative to trying to find somewhere to treat 500lbs of cast iron. It's also going to dry them out ...
Drop your keel/s, blast a layer of some other finer metal on them, grind flat, then treat as usual?
Never heard of it being done but that does not surprise me as not many people have heard of it, so this is on a "Priti Patel/Home Office brainstorming level".
