Is 2205 stainless steel heat exchanger suitable for use in high-temperature alkaline environments of 90 degrees?
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The heat exchanger material selected is for use in high-temperature alkaline environments around 90 degrees Celsius, with circulating water being used for cooling. I would like to ask the experts in this field: is it appropriate to use 2205 stainless steel? Are there more suitable materials (cost-performance needs to be considered)? Thank you very much for your advice
The concentration of caustic soda is 32%, and the temperature is close to 90 degrees Celsius; it is necessary to use circulating water to cool it down to below 40 degrees Celsius. Thank you for your help!
This temperature should be fine with 316L
We previously used heat exchanger plates made of this material, and corrosion and leakage on the hot-alkali side occurred within less than two years; this time, we were wondering if there are materials with better cost-performance that could be used as a replacement.
Does the medium contain chlorine, chlorides, or chlorates?
It might be due to stress corrosion cracking
Hot alkali contains very little chloride, around 40PPm. The chloride ions in the circulating water are around 500
Yes, the temperature difference is significant. Stainless steel 2205 has a slightly higher density; is it not suitable for use here?
This is the corrosion curve of austenitic stainless steel
Are there any suitable manufacturers for the design and production of heat exchangers? We specialize in high-performance heat exchangers for the chlor-alkali chemical industry, with A1A2 design and manufacturing certifications. Feel free to contact me if needed :)