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Go Back   SailNet Community > General Interest > General Discussion (sailing related) > Frameless steel construction
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Topic Review (Newest First)
09-25-2012 04:08 PM
copacabana
Re: Frameless steel construction

Quote:
Originally Posted by chucklesR View Post
Good Luck.
??
09-25-2012 03:59 PM
chucklesR
Re: Frameless steel construction

Good Luck.
09-25-2012 03:27 PM
copacabana
Re: Frameless steel construction

I have to say I'm a big fan of Brent's boats. If you don't know his designs, it's really worth getting his book or checking out the DVD before you form an opinion. As far as powder coating goes, why not just sandblast and then immediately flame-spray the whole boat with zinc? A friend did this when building his and there has been ZERO corrosion in 20 years of hard use. Another possibility is to build it out of aluminium and not paint it above the waterline.
09-25-2012 01:06 PM
Capt.aaron
Re: Frameless steel construction

Quote:
Originally Posted by SloopJonB View Post
There are some fairly big ovens out there - hot rodders get complete frames coated but that's a long way from a steel 35 footer.

It's tough stuff but not indestructible - I don't what you'd do if it was breached but it would start to rust under the coating. You can't spot repair it like paint.

I think the epoxy paint industry is safe for a while longer.
I see, thanks. I've alway's kind of wonderd. I work on 50 year old steel tug and have a paint brush in my hand every day for sometime, spot painting rust.
09-25-2012 12:38 PM
SloopJonB
Re: Frameless steel construction

Quote:
Originally Posted by Capt.aaron View Post
Ya, so has anybody ever thought of building a big ass oven, would powder coating a boat make it impervious to corrosion? What do you need, some bricks and insulation and a fire maker machine?
There are some fairly big ovens out there - hot rodders get complete frames coated but that's a long way from a steel 35 footer.

It's tough stuff but not indestructible - I don't know what you'd do if it was breached - it would start to rust under the coating. You can't spot repair it like paint.

I think the epoxy paint industry is safe for a while longer.
09-25-2012 07:23 AM
Capt.aaron
Re: Frameless steel construction

Ya, so has anybody ever thought of building a big ass oven, would powder coating a boat make it impervious to corrosion? What do you need, some bricks and insulation and a fire maker machine?
09-25-2012 01:55 AM
SloopJonB
Re: Frameless steel construction

Quote:
Originally Posted by PeterSailer View Post
I've never heard of it, what I'm woundering is if the paint used in this process would double up as a good marine paint?
You'd need an oven big enough to hold the boat so it's not likely. It isn't a paint, it's a thermoplastic that is electrostatically attached and then "melted" on in the oven.

Quote:
I've also heard of people painting their boat with automautive paint, but I don't know with what results and I've never actually seen one. Cheers Pierre
Yes you have - two part polys are used on lots of cars & trucks. IIRC Imron was developed for the heavy truck industry.
09-24-2012 08:12 PM
casey1999
Re: Frameless steel construction

Quote:
Originally Posted by PeterSailer View Post
That just might be the hardest part of this hole thing

Cheers

Pierre
Beer and hard liqour is ok, but just say no to women until the boat is sailable.
09-24-2012 08:08 PM
PeterSailer
Re: Frameless steel construction

Quote:
stay away from women while you are building your boat.
That just might be the hardest part of this hole thing

Quote:
I alway's wonderd what it would take to powder coat a steel boat, does such a facility even exist or is this a rediculous idea?
I've never heard of it, what I'm woundering is if the paint used in this process would double up as a good marine paint?

I've also heard of people painting their boat with automautive paint, but I don't know with what results and I've never actually seen one.

Cheers

Pierre
09-24-2012 07:50 PM
peterchech
Re: Frameless steel construction

Sounds like u drank the cool aid good luck and post any pics once u get started !

Quote:
Originally Posted by PeterSailer View Post
Here is a picture os the home made blocks:

Attachment 12256

They look just fine to me, the only thing is the chain link...the guy didn't make the pad eye on the deck big enough, thats it.

Here is a other shot of home made blocks

Attachment 12259

And here is a roller furler:

Attachment 12260





There is a hell of a big difference between aluminum and steel boats...
Number 1 is $$, not everyone has the budget to buy the material for a aluminium boat....or a actual aluminium boat.

Number 2, You need more skills to weld aluminium and you can't expect to be able to do any kind of repaire in a out of the way place except maybe to slap a aluminium sheet on the hull and rivet it in place.

Number 3 corrosion, Aluminium might not rust, but it can be affected big time by electrolysis, good luck if you accidently drop a penny in the bilge, you'll end up with a hole in the bilge in no time!

Number 4, with steel, the boat has more chances of having corrosion issue over the water line, where you can see it easily. With aluminium, you have a bigger chanche to have problems under the water line where you can't spot it right away.

This might sound stupid but I don't know any other building material that will show you the second it starts to corrode with a big red streak.

That being said, I'm not saying that Aluminium boats a no good, just not what i'm looking for.



If you weld up all your detailing before you start the shell, it's possible ( and it has been done with success) to buy your plate wheel abraded and primed with zinc rich primer and build the shell fast enough,so you don't need to sand blased it, the primer has proven to be a good base for epoxy paints.

And even thinking of painting a steel boat with cheap latex paint is ridiculous, IMO epoxy tar is the way to go.


Oh yeah, and tell me she isn't a beauty

Attachment 12261
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