This　work　investigated　the　resistance　of　a　corroded　X80　steel　pipe　to　local　buckling　at　a　corrosion　defect　under　bending　moment.　A　nonlinear　finite　element　model　was　developed　to　study　buckling　behavior　of　the　pipe　and　determine　critical　bending　moment.　Parametric　effects,　including　geometry　of　the　corrosion　defect　(shape,　depth,　length　and　width),　pipe　geometry　(pipe　outer　diameter　and　wall　thickness)　and　operating　pressure,　were　determined.　Results　show　that　pipeline　buckling　at　the　corrosion　defect　depends　on　the　defect　geometry.　A　rectangular　corrosion　feature　results　in　a　lower　buckling　resistance　than　a　semispherical　corrosion　pit　or　a　cylindrical　grooved　corrosion.　The　depth　and　width　of　the　corrosion　defect　are　primarily　factors　affecting　the　buckling　resistance,　while　the　effect　of　defect　length　is　negligible.　The　critical　bending　moment　to　cause　buckling　of　the　pipe,　i.e.,　the　critical　buckling　moment,　decreases　as　the　defect　depth　and　width　increase.　The　buckling　resistance　of　the　corroded　pipe　can　be　improved　by　increasing　the　pipe　outer　diameter　and　wall　thickness.　The　role　of　internal　pressure　in　buckling　resistance　depends　on　whether　a　constraint　condition　is　applied　at　both　ends　of　the　pipe.　For　buried　pipelines　without　sealing　ends,　the　critical　buckling　moment　decreases　as　the　internal　pressure　increases.