Chloride ions will corrode austenitic stainless steel materials at high temperatures. Duplex stainless steel has better chlorine ion corrosion resistance than austenitic stainless steel.

The high temperature and high pressure reactor adopts a composite plate of duplex stainless steel and carbon steel, which is resistant to corrosion and high pressure.

Commonly used duplex stainless steels are 2205, 2507, 2101, etc.