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A German Experiment Proved That Simple Concrete Spheres Make Fantastic Batteries. Now, California Plans To Submerge A 9-Meter Diameter Sphere In The Ocean And Is Already Planning Versions Of 30 Meters (farmingdale-observer.com)

submitted 2 days ago by [email protected] to c/[email protected]

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[–] [email protected] 14 points 1 day ago (1 children)

There are 2000 year old Roman concrete piers that are still just hanging out in sea water. So it's possible if you find the right mix.

[–] [email protected] 11 points 1 day ago

The concrete isn’t the problem. Like mentioned above, the sealife growth is. Also, metal and moving mechanicals are savaged by seawater (and the sealife growth). Keeping things working on the surface of the water is difficult and expensive. Water pressure makes that even worse. Maintenance requires divers which are likewise very expensive.