Thermodynamic and kinetic causes of passivity

摘要: Abstract The transition from an adsorbed oxygen monolayer to the continuous oxide film is emphasized as continuous. error of traditional potential calculations for passivating formation shown be due use standard value metal free energy instead its real on outer side film. It that so-called chemical dissolution not a step can limit rate passive metal. experimental data electrochemical behaviour magnetite are used show equilibrium must occur in solution and surface. distribution between components lattice estimated. Cation transfer into same anodic act active. Passivation occurs because increase barrier this transfer, strengthening bonds surface cations solid phase. stability two effects causes.