This　work　investigated　buckling　resistance　of　an　X80　steel　pipe　containing　a　corrosion　defect　under　axial　compressive　loading　by　finite　element　analysis.　A　3-dimensional　numerical　model　was　developed　to　determine　parametric　effects　on　buckling　behavior　of　the　corroded　pipeline.　These　included　dimension　of　the　corrosion　defect　(i.e.,　length,　depth　and　width),　pipeline　geometry　(i.e.,　outer　diameter　and　wall　thickness),　internal　pressure　and　mechanical　properties　of　the　steel　(i.e.,　yielding　strength,　tensile　strength　and　strain　hardening　exponent).　The　critical　buckling　load　of　the　corroded　pipeline　is　primarily　affected　by　the　depth　and　width　of　the　corrosion　defect,　while　the　defect　length　is　the　least　important.　As　the　defect　depth　and　width　increase,　the　critical　buckling　load　decreases,　but　the　effect　of　corrosion　width　is　not　apparent　when　the　dimensionless　corrosion　width　w/pi　D(w　is　width　of　corrosion　defect　and　D　is　the　pipe　outer　diameter)　is　greater　than　0.5.　The　threshold　defect　length　affecting　the　critical　axial　load　of　the　pipeline　is　L　root　Dt　=　4.86(t　is　pipe　wall　thickness).　When　L/root　Dt　＞　4.86,　the　influence　of　the　defect　length　is　ignorable.　Pipeline　containing　a　long　corrosion　defect　feature　of　double　buckling　wave　peaks,　and　a　short　corrosion　defect　contains　a　single　buckling　wave　peak.　The　critical　buckling　load　of　the　corroded　pipeline　subjected　to　the　axial　compression　load　increases　with　increased　pipe　outer　diameter　and　wall　thickness,　but　decreases　with　internal　pressure.　The　increased　yield　and　tensile　strengths　of　the　steel　can　improve　the　capacity　to　prevent　local　buckling　of　the　corroded　pipeline.　The　strain　hardening　exponent　has　a　limited　effect　on　the　critical　buckling　load,　which　shows　a　significant　decrease　when　the　operating　pressure　is　up　to　the　critical　internal　pressure,　resulting　in　yielding　of　the　pipeline.