Electrochemical rehabilitation technology is an effective method to improve the durability of chloride ion contaminated concrete structures. However

negative effects such as reduction of bonding performance

pore structure changes of concrete

and hydrogen embrittlement of steel bar are induced simultaneously

leading to the service performance deterioration of the monolithic component. In order to explore the durability enhancement and mechanical properties of concrete beams after electrochemical chloride extraction and bidirectional electromigration

the corrosion resistance properties of concrete beam after electrochemical rehabilitation were analyzed by combining chloride ion content gradient and potentiodynamic polarization curves

and the static mechanical properties were investigated through load-deflection curves

strain of steel and concrete

and crack distribution of concrete. Results show that electrochemical rehabilitation could effectively remove the surface chloride ions of steel bar and restore the passivation of steel bar

but the extraction of the chloride ions inside steel cage was difficult. When small electrification parameters were selected

electrochemical rehabilitation hardly affected the stiffness and load bearing capacity of the beam

while the bearing capacity decreased when the amount of electricity increased

and the ductility degradation became more obvious. In order to meet the requirements of durability and structural safety

it is suggested that effects of durability enhancement and impacts on mechanical properties deterioration should be comprehensively taken into consideration when selecting electrification parameters for electrochemical rehabilitation.