Estimation of the parameters of oxide film growth on nickel-based alloys in high-temperature water electrolytes

Kinetic parameters of the oxidation of zirconium alloys in simulated WWER water – Effect of KOH content

“…8(a)-9(a)). As such a law for film growth has been derived both from the PDM and the MCM [30], the evolution of oxide thickness with time can be taken as another proof for the adequacy of the representation of the corrosion processes using the MCM. The thickness of the whole oxide and the outer layer is larger on Zircaloy 4 when compared to E110 and in general increases with KOH concentration.…”

Effect of Oxide Film Properties on the Kinetics of O2Reduction on Alloy C-22

“…− (299.378 + 0.092T ) (T − 298) − 20.591 × 10 3 8.3144T [7] The empirical parameters are evaluated from fits of (c aq ) to c l using available electrolyte solubility data.…”

“…Their reliable performance under extreme industrial conditions is generally attributed to their elemental composition and the passive behavior it induces. A wide array of in-situ and ex-situ analytical techniques [1][2][3][4][5][6][7][8] has been employed to assess passive behavior and its influence on the corrosion performance of these alloys. The combination of high Cr and Mo contents leads to the formation of a Cr-dominated passive oxide film 2,3,[9][10][11] with a duplex film structure, 12 which provides resistance against oxidizing environments.…”

The corrosion behavior of Alloy 52 weld metal in cyclic hydrogenated and oxygenated water chemistry in high temperature aqueous environment

“…This feature also indicates that the oxide film shows different semi conductive properties in different potential ranges, namely in low potential range n type and in high potential range p type. This can be verified by CER and EIS results of Ni based alloys measured at different potentials [15,25] and also Mott-Schottky plot of Alloy 625 performed in high temperature water [21]. According to the Mixed-Conduction Model (MCM) proposed by Bojinov et al [15], in low potential range the main charge carrier is oxygen vacancy while in high potential range the cation vacancy plays a more important role ensuring the apparent p-type conductivity.…”

“…Fig. 17 shows a model for the mechanism of formation of the oxide film on Ni-Cr alloys in high-temperature water based on MCM [25]. According to the model, four main reactions occur at the metal/oxide film (M/F) interface and the oxide film/electrolyte (F/E) interface shown as follows:…”