Supercritical CO2 erosion protection

  • Thread starter Stormer
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Hi. As i understand from what i have read about supercritical CO2 loops a major hurdle is erosion of the materials. especially in the hottest zones of the loop and in thin material sections and zones where the fluid changes direction or expands/compresses. But from the experiments i have read they have usually used plain uncoated stainless steels.

And some suggest making critical parts out of superalloys. But can you not just coat the stainless steel with a erosion resistant coating in stead of making the whole part out of superalloys? And if so what sort of coating material will be suitable? Will for example titanium nitride coating, or hard chrome plating help against erosion?
 

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