What material should be chosen for corrosion resistance in high temperature, high pressure, and low concentration hydrochloric acid environments?
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The operating temperature ranges from 20 to 300°C, the operating pressure is below 10 MPa, and the working medium is a sodium chloride solution with a pH of 3 to 10. Can titanium material (TA10) be used? Note: Due to high work pressure, titanium, a metal material, was chosen ； However, according to general literature values, the corrosion resistance of titanium to low-concentration hydrochloric acid is generally applicable in the room temperature range; I have not found any data on titanium-hydrochloric acid corrosion at temperatures above 200°C. So I would like to ask fellow sailors whether titanium can be used in such conditions, or if there are any other materials that would be more suitable as alternatives (of course, extremely expensive materials like platinum and gold are not considered) I would also appreciate some advice from the experts here~~~
The Hastelloy B series alloy is suitable for these operating conditions
Hastelloy C-276 is also an option!
Steel-lined graphite can be used. -
HaB is definitely possible. As for HaC-276, it has the same issue as TA10 – it’s hard to determine its performance under these conditions.
HB is definitely a good option, but the price of this material is too high. 276 could be worth giving a try!