Supercritical water oxidation (SCWO) is a promising and very effective method for the oxidation of organic wastes. Its high volubility for organic compounds and its special physical properties (i.e. density, viscosity) result in a key advantage over standard processes like incineration. Due to the formation of HCl during oxidation of chlorine organics, a severe
corrosion attack of most of the materials has been observed. This paper describes the results of investigations of nickel base alloy G-30 and Ducrolloy, a new PM Cr-Fe alloy, exposed at 400 bar and 420°C for up to 400 hours in a CH2Cl2/H2O2 mixture with about 2000 wppm of chloride.
The weight losses varied between...
Keywords: SCWO, supercritical water, corrosion, oxidation, chloride, high temperature, high pressure, nickel base alloys, chromium-iron alloys