摘要
In this work on marine atmospheric corrosion the changes in oxygen reduction rate with decrease of electrolyte film thickness during drying was studied by Kelvin probe reference electrode technique andimpedance measurements based on previous results. For > 50μm electrolyte film thickness, the oxygen diffusion in liquid controlled the oxygen reduction process.As the cathodic limiting currents increased to about lmA/cm2 with evaporation, the rate of oxygen transportation at the gas/liquid boundary limited thecurrent increase. If the thickness decreased to less than 10μm, the very heterogeneous current distributioncaused a sharp decrease in the total cathodic current due to the effect of the electrolyte film’s increased solution resistance. The calculated result on the basis of the assumption showed good agreement with the experimental findings.
In this work on marine atmospheric corrosion the changes in oxygen reduction rate with decrease of electrolyte film thickness during drying was studied by Kelvin probe reference electrode technique andimpedance measurements based on previous results. For > 50μm electrolyte film thickness, the oxygen diffusion in liquid controlled the oxygen reduction process.As the cathodic limiting currents increased to about lmA/cm2 with evaporation, the rate of oxygen transportation at the gas/liquid boundary limited thecurrent increase. If the thickness decreased to less than 10μm, the very heterogeneous current distributioncaused a sharp decrease in the total cathodic current due to the effect of the electrolyte film's increased solution resistance. The calculated result on the basis of the assumption showed good agreement with the experimental findings.
