this post was submitted on 31 Mar 2026
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What are the tanks made of? "Molten salt" sounds like it would fuck up most materials
Various common steels with a bunch of insulation around it usually, sometimes with a thin coating. The potassium/sodium/calcium nitrate mixes that are used with concentrated solar systems operating in range between 200 C and 600 C. So like, yah you don’t want to touch it, but it’s not gonna do much to steel. It can be somewhat corrosive, but, this is fairly easily mitigated by design.
Molten salt for heat transfer and thermal storage is a pretty mature technology that goes way back before we started using it in concentrated solar systems.
As a first guess, I would use glass fused to steel tanks. I would need to do a detailed look at material compatibility, talk to vendors, and run some bench scale studies before I moved forward with anything.
Source: am licensed engineer
Nokia 3310s.
If you're gonna build it, you might as well over-build it I guess...