The　effect　of　stray　current　and　stress　on　corrosion　of　API　X65　steel　in　simulated　solution　of　the　alkaline　soil　in　Daqing　in　China　was　investigated　using　corrosion　potential　test,　potentiodynamic　polarization　measurement,　as　well　as　surface　analysis　techniques.　A　mathematical　relationship　between　corrosion　rate　and　yield　strength,　direct　current　(DC)　stray　current　density　was　obtained　by　multiple　linear　regression.　The　results　demonstrate　that,　the　corrosion　potential　of　API　X65　steel　with　and　without　superimposed　DC　stray　current　all　shifted　negatively,　and　the　corrosion　current　density　increases　with　the　enhancement　of　tensile　stress　in　solution.　The　corrosion　current　density　under　the　synergistic　effect　of　stress　and　stray　current　is　much　higher　than　corrosion　current　density　that　single　factor　(stress　or　stray　current)　induced.　Comparing　with　the　stress,　the　effect　of　stray　current　on　corrosion　rate　of　API　X65　steel　is　more　significant　in　elastic　deformation.　Mutation　in　corrosion　potential　and　corrosion　rate　appeared　when　the　strain　reaches　plastic　deformation.　This　work　provides　reference　suggestion　for　pipeline　safety　design　and　operation,　where　the　corrosion　enhancement　due　to　the　synergistic　effect　of　stray　current　and　stress　should　be　considered.　(C)　2014　Elsevier　B.V.　All　rights　reserved.