This　paper　investigates　the　effects　of　sodium　polyacrylate　and　polyacrylate-co-acrylamide　superabsorbent　polymers　(SAPs)　on　the　self-healing　performance　and　corrosion　resistance　of　steel　rebar　embedded　in　cracked　and　uncracked　ultra-high　performance　concrete　(UHPC)　specimens　in　pure　water　and　chloride　seawater.　The　self-healing　efficiency　was　assessed　by　measuring　the　swelling　capability　of　SAPs,　quantifying　crack　widths　closure,　and　evaluating　the　corrosion　behaviors　of　the　UHPC　specimens　over　280　days　using　electrochemical　impedance　spectroscopy.　Healing　products　were　identified　via　scanning　electron　microscopy　and　X-ray　diffraction.　The　results　revealed　that　SAPs-based　specimens　achieved　complete　crack　healing　(100　%)　and　significantly　enhanced　the　corrosion　resistance　of　steel　rebar　in　pure　water.　However,　in　chloride　seawater,　the　ability　of　SAPs　to　close　cracks　and　improve　corrosion　resistance　was　reduced.　Although　SAPs　delayed　the　corrosion　process　in　both　environments,　they　could　not　completely　restore　the　corrosion　resistance　lost　due　to　cracking,　achieving　13.65　%　healing　efficiency　for　the　mixture　with　sodium　polyacrylate　SAP　and　10.60　%　for　the　mixture　polyacrylate-co-acrylamide　SAP.　Microscopic　observation　and　chemical　analysis　revealed　that　C-S-H　crystals　were　the　primary　healing　product,　with　small　amounts　of　CaCO3.　The　formation　of　Friedel＇s　salt　was　also　observed　in　chloride　seawater.　©　2024　Elsevier　Ltd