This　study　adopts　experimental,　numerical,　and　algorithmic　methods　to　investigate　the　compressive　behavior　and　failure　mode　of　corroded　circular　steel　tube　short　columns.　The　study　establishes　an　equivalent　relationship　between　electrochemical　accelerated　corrosion　and　natural　coastal　corrosion　environments.　The　effects　of　current　intensity,　sodium　chloride　concentration,　and　energizing　time　on　corrosion　equivalent　duration　and　mechanical　properties　of　specimens　are　analyzed.　The　results　demonstrate　that　the　ultimate　bearing　capacity　and　energy　absorption　capacity　of　the　specimens　are　significantly　reduced　with　increasing　current　intensity　and　energized　time.　However,　the　NaCl　concentration　has　minimal　effect　on　the　mechanical　properties　of　the　specimens.　After　natural　corrosion　in　a　coastal　area　with　medium　salinity　for　19.2　years,　the　ultimate　bearing　capacity,　ductility,　initial　stiffness,　and　energy　absorption　capacity　of　circular　steel　tube　short　columns　decreased　by　49.5　%,　63.1　%,　48.9　%,　and　85.6　%,　respectively.　A　novel　corrosion　pit　generation　algorithm　is　suggested　to　accurately　simulate　the　distribution　of　corrosion　pits　and　determine　the　ultimate　bearing　capacity　of　circular　steel　tube　short　columns.　This　algorithm　demonstrates　improved　accuracy　and　stability　compared　to　traditional　simplified　methods.　Subsequently,　a　corrosion　pit　random　generation　model　is　developed　using　this　method,　and　the　accuracy　of　the　finite　element　model　is　validated　against　experimental　results.　Furthermore,　the　impact　of　the　diameter　thickness　ratio　on　the　ultimate　bearing　capacity　of　corrosion　specimens　is　thoroughly　analyzed.　©　2024