In　this　paper,　the　resistance　of　mechanically　prepared　one-part　alkali-activated　materials　to　external　sulfuric　acid　attack　was　investigated　by　simulating　realistic　erosion　environments　in　terms　of　sulfate　type,　concentration,　and　erosion　mode.　The　macro-scopic　properties　of　the　specimens　were　measured　at　different　ages.　Microscopic　analyses　were　performed　by　Fourier-transform　infrared　spectroscopy　(FTIR),　X-ray　diffraction　(XRD),　mercury　intrusion　porosimetry　(MIP),　and　other　techniques　to　obtain　the　effect　of　different　erosion　environments　on　the　mechanical-force　chemically　prepared　one-part　alkali-activated　materials　against　sulfate　erosion.　The　study　shows　that　the　mechanical　properties　of　the　specimens　showed　a　trend　of　increasing　and　then　decreasing　with　the　extension　of　erosion　time.　Compared　with　Na2SO4　erosion,　the　erosion　damage　was　greatest　when　the　sulfate　containing　Mg2+　was　eroded　in　a　wetting-and-drying　cycle;　the　erosion　products　of　Na2SO4　solution　coexist　in　the　form　of　calcite　and　gypsum,　while　the　erosion　products　of　MgSO4　solution　mainly　consist　of　gypsum.