Sources include technical, trade and news publications. The second section includes information that was obtained from a survey of alloys manufacturers and individuals working in academic, research and commercial organizations relative to their experience with corrosion and materials selection in hydrothermal oxidation processes. The current hot topic provides a review of literature for Wet Air Oxidation systems. The Previous article in this series provides an introduction to hydrothermal oxidation processes. In this process, the waste is heated and pressurized to an average of 200 C and 1000 psi.
Air is added as an oxidant.
Residence times at these conditions are about 30 minutes. Corrosion is one of the major problems in this process. As welded U-bend specimens were used in autoclave studies. Again titanium, alloy C-276, and alloy 625 showed no observed corrosion. The pH of the testing environment was 3.2.