Rustproofing inside steel hull with tar

parkland · Nov 17, 2012

pdwiley said: ↑

Are you talking about pickled & oiled plate or hot rolled plate with the mill scale still on it?

Vast, vast difference in how you go about covering it to inhibit rust between the two.

Hot rolled plate, if you want long life, needs to be blasted and primed. Many have tried to avoid this step. Good luck if you want to be the next failure in the ranks.

Pickled & oiled plate has the scale off already - that's the pickling bit. Recommended treatment is to wash it down with a good detergent, flush with a lot of fresh water and then paint with oil based paint. Or epoxies.

Painting the interior is such a PITA that you don't ever want to do it again just because you wanted to save a bit of time and money the first time round. My hull has 3 coats of primer over the weld-through primer then 4 coats of enamel over the primer, and the steel was professionally blasted before I started building. I enjoyed none of this including paying the bill for the blasting, but I'd do it all again.

I can't think, offhand, of a single book written by a boatbuilder where using tar is a recommended coating for steel.

Now, if you want to ignore the accumulated knowledge & advice of people who've built steel boats, go for it. You've gotten the advice of the people on this forum, and it's 'Don't do it'. Up to you if you take notice or not, but do us a favour and don't just keep arguing your position because you want to be right.

PDW
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No no, just curious.

viking north · Nov 17, 2012

The best bang for your buck and as far as i'm concerned is as good as anything at 10 times the cost, is good old oil based Tremclad . Advertised as Tremclad Rust Paint. I have two big old schooner anchors and chain as ocean side garden ornaments. Chipped off the loose rust and painted them with Tremclad some 15 yrs ago . Still very little sign of rust.

Frosty · Nov 17, 2012

What ever you paint it with it will need maintainence, thats steel for you .

Chipping and cleaning now and again is what you need to do as any steel structure from a bridge to a ship,----- chip and paint.

What you have now sounds great to me.

If you see a spot , clean it up and paint with grease. If you looking for a one coat job and forget about ti I dont think there is anything

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Rustproofing inside steel hull with tar

parkland Senior Member

viking north VINLAND

Frosty Previous Member

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