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Preserved Shipwrecks Found in the Black Sea

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Interesting how when they raise an old ship they have to keep it moist for months or years to properly preserve it when being wet was what often slowly eats a wreck away lol.

But the science is sound in doing those special processes, probably would be a concept that would confuse a many people in the world though.

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3 hours ago, Admiral_Thrawn_1 said:

Interesting how when they raise an old ship they have to keep it moist for months or years to properly preserve it when being wet was what often slowly eats a wreck away lol.

But the science is sound in doing those special processes, probably would be a concept that would confuse a many people in the world though.

 

When raising ships from saltwater, they have to be immersed in fresh water (changed at regular intervals) for several months to dissolve the salt crystals away. If you took an artefact (especially wooden) out of salt water and kept it out to dry, as most people would do, the water would evaporate but the salt crystals will expand and crack the wood or metal.

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10 hours ago, LordGomes said:

 

When raising ships from saltwater, they have to be immersed in fresh water (changed at regular intervals) for several months to dissolve the salt crystals away. If you took an artefact (especially wooden) out of salt water and kept it out to dry, as most people would do, the water would evaporate but the salt crystals will expand and crack the wood or metal.

Exactly, also I think there may also be the danger of air bubbles getting into the artifacts if they are dried to quickly since everything rarely dries evenly if left on it's own.

Have also heard of a process presumably later on where they change to yet another liquid that is a sort of preservative to ensure the wood hull not only survives but will stay intact for many years.

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5 hours ago, Admiral_Thrawn_1 said:

Exactly, also I think there may also be the danger of air bubbles getting into the artifacts if they are dried to quickly since everything rarely dries evenly if left on it's own.

Have also heard of a process presumably later on where they change to yet another liquid that is a sort of preservative to ensure the wood hull not only survives but will stay intact for many years.

 

They probably use an oil of some sort for wooden ships / artefacts, to keep moisture from getting in. This is useful if you've found a souvenir from a wreck (if that's legal in the area) and you don't want it to fracture.

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