The　combined　influences　of　AC-DC　interference　and　stress　on　the　corrosion　and　delamination　behavior　of　X70　steel　in　the　neutral　environment　was　studied　using　COMSOL　Multiphysics　software,　electrochemical　tests,　weight　loss　experiments,　and　surface　analysis　techniques.　Results　showed　that,　under　the　stress　of　364　MPa,　as　the　stray　current　density　increased,　the　corrosion　potential　shifted　towards　the　negative　side,　with　no　passive　region　on　polarization　curves,　but　only　an　active　dissolution　region.　Under　the　influence　of　DC　interference,　the　anodic　polarization　curves　showed　a　significant　inflection　point,　due　to　the　accumulation　of　a　large　number　of　corrosion　products　on　the　surface　of　X70　steel,　which　hindered　the　anodic　polarization.　At　the　same　time,　the　corrosion　rate　and　the　maximum　depth　of　the　corrosion　pits　increased　with　increase　in　DC　density.　The　corrosion　reaction　followed　Faraday＇s　law　of　electrolysis.　Under　the　influence　of　combined　AC　and　DC　interferences,　the　corrosion　rate　and　the　depth　of　the　corrosion　pits　were　in　the　following　order:　combined　AC　and　DC　interferences　＞　DC　interference　＞　AC　interference.　The　influence　of　AC　interference　on　the　delamination　was　less　than　that　of　DC　interference.　The　delamination　area　of　the　anticorrosive　coating　under　DC　interference　with　a　current　density　of　300　A/m(2)　was　about　5　times　that　under　AC　interference.　Also,　under　the　combined　influence　of　AC　and　DC　interference,　the　delamination　area　of　the　coating　was　larger　than　that　under　the　influence　of　either　AC　or　DC　interference.　In　this　paper,　a　model　for　delamination　process　under　the　influence　of　stray　current　was　proposed,　in　which,　the　corrosion　reaction　occurred　first　at　the　sample　defects.　When　the　amount　of　corrosion　product　accumulated　to　a　certain　extent,　separate　cathode　and　anode　regions　were　formed　on　the　sample　surface,　which　resulted　in　delamination　of　the　coating.