Inhibition Efficiency of Migration Corrosion Inhibitors Assessed by Electro-osmosis Method

Corrosion inhibitor is one of the most important technologies to enhance the durability of steel reinforced concrete.A fast evaluation technique of electro-osmosis was used to assess the inhibitor efficiency by using a 32 V electric field to accelerate the chloride ion migration (ACIM)in concrete and induce corrosion.Potentiodynamic polarization scanning tests were used to evaluate the corrosion states.The comprehensive efficiency of inhibitors should be assessed in resistance to chloride ion permeability and the anti-corrosion efficiency.The time of testing was about four days and the results clearly showed the differences of inhibition efficiency.