In the standard test, the upper limit temperature is 450 ° C and the upper limit pressure is 30MPa. By setting up the device, it is possible to test with an upper limit temperature of 600 °C and 27 MPa.

The ion product of subcritical water and supercritical water is shown in A.0. As shown in the right figure, the pH decreases with increasing temperature and reaches 5.6 at 250 °C. It increases as the temperature increases further, reaching 8 at the critical point, which is equivalent to that of methanol at room temperature.
Even if the pH changes, the water itself is neutral, but piping materials such as SUS are exposed to conditions that are easily corroded. Please contact us for more information.