Material selection for chloride environments
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Medium: Industrial chilled brine (calcium chloride) at -15°C; what material is suitable for the heat exchange tubes?
If choosing a pump, a fluorine-lined pump can be used.
Carbon steel (20 steel) can be used. Under these operating conditions, the corrosion resistance of carbon steel is good, with an annual corrosion rate of 0.05–0.5 mm/year.
Actually, you also need to evaluate the concentration: UNS Concentration (Vol %), Temperature (deg C), Rate (mm/yr) or Rating. S30400: -12, 0.003; S30400 at ~30°C: -12, 0.003 max; S31600: -12, 0.003; S31600 at ~30°C: -12, 0.003 max. This is the information from the table, provided for reference