Molten　Salt　is　often　used　as　the　thermal　energy　storage　(TES)　medium　in　solar　power　stations　for　its　excellent　properties,　while　the　temperature　is　up　to　500∼600,　which　makes　the　corrosion　on　materials　of　heat　storage　system　a　key　problem.　In　this　study,　an　exclusive　(corrosion　system　of　flowing　molten　NaNO3/KNO3　binary　salt)　experimental　device　was　designed　and　built　to　investigate　the　corrosion　dynamic　characteristics　of　304　stainless　steel　sample　under　the　synergistic　effect　of　different　flow　rate　and　time　period　for　Crescent　Dunes　Tower　Molten　Salt　concentrating　Solar　Power　(CSP)　plant　in　USA.　And　the　micro　corrosion　morphology,　corrosion　product　form　and　elements　were　explored　by　such　measuring　instruments　as　SEM,　EDX　and　XRD　to　reveal　the　corrosion　behavior　and　mechanism　of　304　stainless　steel　in　high　temperature　molten　salt　flow.　©　2020,　Science　Press.　All　right　reserved.