Caustic soda corrosivity
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Is 32% sodium hydroxide at 65 degrees highly corrosive to 304 stainless steel?
There will be no severe corrosion; 304 stainless steel can be used in such an environment.
The corrosion is not severe, so carbon steel will suffice; there is no need to use stainless steel.
It can be used； It is best to use nickel plates
In our company, 45% of the caustic soda is produced using carbon steel, and no signs of corrosion have been observed either. 5# zhangyan_82
It depends on where you plan to use it later. If it’s going into an electrolyzer, be careful of iron infiltration, as it can damage the ion membrane – that component is very expensive and cannot be used if damaged. If there are no specific requirements for it in future use, then you can use it without concern; it should hold up for ten or eight years with no problems.