Question for homebuilt ballast keel

[Lunde]

Hey!I am new to this forum, and I have a question, that I hope one of you clever people can give some thouht on...
I have built a wooden 26 feet gaff cutter, and have moved on to the outside ballast keel.Now , I have made a stainless steel box, in which I want to fill in scrap lead, this stuff is really hard to find around here(portugal), but found 1500 kg of leftover stuff from batteries, fishing lead and so on.So now I want to make small solid forms of cement and the scrap lead to fit into the stainless steel form.How will this be in a saltwater environment?The whole box will fit at the wooden keel and bolted to the keel.Since its my first boatbuilding experience, I am a bit excited to see how this metal piece will react in the water.I have heard that stainless steel will corode too soon in saltwater.

[yokebutt]

Lunde,

Here's one possibiliy, throw all the chunks into the stainless box, rig a big-ass propane heater or two under it, let it melt, scoop off the slag, let it cool, then lift the casting out of the box and install on the boat.

Melting lead isn't very difficult, its specific heat capacity is farily low.

One more thing, stand upwind.

Yoke.