Kinetics of Iron Corrosion in Concentrated Acidic Chloride Solutions

摘要: The kinetics of active iron dissolution at 25°C has been studied in deaerated 1N and 6N chloride solutions for hydrogen ion concentrations 0.1–6.0N. For with , the reaction is described by anodic Tafel slope electrochemical order respect to activity . These parameters are characteristic a mechanism which chemisorbed halide ions interact adsorbed hydroxyl two‐electron rate‐determining step. solutions, this holds only over narrower (H+) region up 0.24N, With increased ; indicating that (and no longer ion) catalyzed reaction. A positive value ensues synergistic adsorption on covered surface. formal detailed proposed, giving agreement experiment. Alternate mechanisms including one‐electron transfer schemes discussed.