Supercritical water oxidation (SCWO) is a waste treatment process that has been under development since the late 1970s (1); but only recently has the first full-scale demonstration facility been built (2). SCWO operates at elevated temperatures (greater than 374 °C) and pressures (greater than 22.1 MPa) with excess oxygen. It has been demonstrated that SCWO is an environmentally attractive waste treatment option which has the potential to be economically competitive. However, one of the major technical challenges for commercialization of SCWO technology is to identify suitable materials of construction for various process
equipment. In this paper, an apparatus and experimental procedure for studying the corrosion behavior of 316 stainless steel (316 SS) and grade 9 titanium (Ti gr 9) will be described. The performance of these materials based on this procedure as well as other procedures will also be discussed.