A theoretical model on electrochemical response of passivated metals to solid particle impingement

作者：Lu B T^*; Luo J L; Ma H Y

来源：Journal of the Electrochemical Society, 2007, 154(3): C159-C168.

DOI：10.1149/1.2426895

A theoretical model based on kinetic analysis has been developed for predicting the electrochemical response of passivated metals to solid particle impingement in corrosive slurries. The applicability of the new model was verified using experimental data from the literature. The model accurately predicts correlations between corrosion current density and erosion rate, and the effects of various hydrodynamic parameters on corrosion in flowing slurries, including flow velocity, concentration of solid particles, and impingement angle. The model confirms theoretical predictions that corrosion is controlled mainly by the rate of generation of active area due to particle impingement and repassivation kinetics of the active area. Consequently, the factors that promote mechanical erosion are shown to accelerate corrosion of passivated metals in flowing slurries through the effects of erosion-enhanced corrosion.

• 出版日期2007
• 单位山东大学