Seismic　damage　mitigation　of　corroded　reinforced　concrete　(RC)　bridge　columns　in　marine　environment　will　be　an　impending　problem　in　many　countries　in　which　a　mass　of　bridges　have　been　constructed　for　20　or　more　years.　In　this　paper,　cyclic　pseudo-static　tests　were　conducted　on　three　1/4-scaled　RC　column　specimens　with　and　without　retrofit　by　carbon　fiber　reinforced　polymer　(CFRP)　fabric　in　order　to　investigate　seismic　performance　of　low-level　corroded　columns　and　the　efficiency　of　CFRP　as　a　retrofit　measure.　The　first　specimen　was　designed　with　normal　design　details　of　Chinese　specifications,　which　worked　as　a　reference.　The　second　and　third　columns　were　both　corroded　with　a　target　of　low-level　corrosion　in　the　plastic　hinge　zone　using　an　electrochemical　method.　Meanwhile,　the　third　column　was　retrofitted　by　CFRP　jackets　in　the　plastic　hinge　region.　The　experimental　results　were　then　employed　to　evaluate　the　damage　process,　failure　mode,　displacement　ductility,　energy　dissipation,　lateral　resistance　strength,　and　residual　displacement　of　each　specimen.　The　results　show　that　although　low　level　of　corrosion　in　the　tested　columns,　the　displacement　ductility　was　significantly　reduced　due　to　weakened　confinement　of　the　corroded　transverse　rebars　and　reduced　area　of　the　corroded　longitudinal　bars.　In　addition,　retrofitting　the　column　using　CFRP　fabric　jackets　could　significantly　increase　the　displacement　ductility　and　reduce　the　residual　displacement　to　some　extent.　It　is　worth　noting　that　retrofitting　of　corroded　column　using　CFRP　jackets　did　not　improve　the　lateral　strength.