Temperature is the most important factor for hydrogen generation during supercritical water gasification process. However, the increasing temperature could accelerate the corrosion of the reactor material, at the presence of oxygen, as less amount of oxygen can promote the hydrogen production. In this study, we prepared a 0.1 mm thick of TiO2 coating on the surface of 316L stainless steel (SS316L) to enhance the corrosion resistance of SS316L during hydrogen production process in supercritical water. The influences of temperature (400-500 degrees C) on surface morphologies and corrosion depth and rate of TiO2/SS316L were evaluated at 25 MPa with 1000 mg/L oxygen for 80h. Results showed that cracks and pores were present on the surface of TiO2/SS316L after corroded in SCW for 80h. The crack width and corrosion rate was aggravated at higher temperature. The remained thickness of the coating at 400 degrees C, 450 degrees C, 500 degrees C were 0.08 mm, 0.05 mm and 0.03 mm, respectively. NiO and NiFe2O4 were generated around the crack on the surface of TiO2/316L at 500 degrees C, the coating had a tendency to peel off the substrate. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.