Join Date: Jan 2012
Location: British Columbia
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Re: Pros and cons of steel sailboats
With a steel hull, any hot pipes running thru it (exhaust, stove pipe, etc)should have stainless plate, set in flush, for the first two or three inches around it. Even with a wet exhaust, you still see rust around the exhaust pipe, due to slightly elevated temperatures around it. Every ten degrees rise in temperature increases the corrosion rate considerably.
With a 1 1/2 inch sch 40 exhaust running thru the transom, I like to weld a 2 1/2 inch length of 4 inch SS tube centred around where it runs thru, to make a good place to end the insulation. A similar piece of tube around the stove pipe makes a good way to finish the panelling. Sometimes you can find an SS angle flange, for an excellent finish to the panelling.