To　reduce　the　surface　alkalinity　of　artificial　reef　concrete　(ARC)　and　save　fresh　water　and　natural　aggregate　resources,　a　new　artificial　reef　concrete　(NARC)　made　with　sulphoaluminate　cement　(SAC),　sea　water　and　marine　sand　was　proposed　in　our　previous　work.　However,　the　steel　corrosion　as　a　major　concern　associated　with　NARC　has　not　been　explored.　In　this　paper,　the　effects　of　cement　type　(SAC,　ordinary　Portland　cement　(OPC),　mixed　cement　of　OPC　and　SAC)　on　the　chloride　permeability　and　capillary　water　absorption　of　sea　water　and　marine　sand-based　ARCs　were　studied.　The　anodic　polarization　and　loss　of　steel　rebar　weight　were　used　to　evaluate　the　effects　of　the　cement　type　and　corrosion　inhibitor　on　the　corrosion　of　steel　rebars　in　ARCs.　The　results　of　the　present　work　show　that　for　sea　water　and　marine　sand-based　ARC,　SAC　significantly　improves　the　microstructure　and　decreases　the　chloride　penetration　and　the　water　absorption　rate.　Meanwhile,　due　to　the　high　chloride　binding　rate　of　SAC,　the　corrosion　degree　of　rebars　in　NARC　is　less　than　that　of　sea　water　and　marine　sand-based　ARC　with　OPC　and　mix　cement　of　OPC　and　SAC.　Compared　with　ordinary　ARC　(ARC　made　OPC,　fresh　water　and　river　sand),　the　steel　rebar　corrosion　in　NARC　is　more　serious.　Nevertheless,　a　2%　dosage　of　corrosion　inhibitor　(TEA)　can　significantly　decrease　the　steel　rebar　corrosion　in　NARC　to　a　similar　corrosion　degree　of　ordinary　ARC.　The　feasibility　of　using　marine　sand　and　seawater　in　SAC-based　ARC　is　verified.　(C)　2019　Elsevier　Ltd.　All　rights　reserved.