The effect of the presence of dissolved ferrous ions (Fe2+(aq)) on oxide film growth and conversion on Type-316L stainless steel in pH 8.4 borate solutions was studied by a range of electrochemical and surface imaging and spectroscopic analysis techniques. The results provide a consistent picture of the anodic oxidation behavior of the stainless steel surface. At potentials below -0.3 V-SCE, the rate of oxidation is somewhat decreased by the presence of Fe2+(aq) in solution. At potentials > -0.3 V-SCE, the presence of Fe2+(aq) in solution substantially increases the formation of gamma-FeOOH via oxidation of Fe2+(aq) at the oxide/water interface. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.067211jes] All rights reserved.