Supercritical　water　oxidation　(SCWO)　can　efficiently　and　harmlessly　dispose　municipal　sludge　(MS),　but　typically　faces　severe　reactor　corrosion　problems.　In　this　work,　316　stainless　steel　(316SS)　sample　surface　was　processed　by　atmospheric　plasma　spraying　to　form　a　protective　ZrO2　or　TiO2　coating.　The　316SS,　ZrO2/316SS　and　TiO2/316SS　samples　were　exposed　to　a　typical　MS　SCWO　environment　(at　450　degrees　C,　24　MPa　and　1.2　of　oxidation　coefficient)　for　20h-150　h.　The　results　show　that　prolonging　exposure　time　increased　corrosion　and　surface　coating　could　inhibit　316SS　corrosion.　ZrO2/316SS　showed　the　best　corrosion　resistance　among　316SS,　ZrO2/316SS　and　TiO2/316SS,　and　its　maximum　corrosion　rate　was　0.0097　mg.cm(-2).h(-1).　The　oxide　film　of　ZrO2/316SS　after　150　h　of　corrosion　exposure　consisted　of　ZrO2,　FeO,　Fe2O3,　NiO　and　Cr2O3,　and　its　inner　layer　was　rich　in　Cr2O3.　The　ZrO2　coating　was　much　more　stable　than　the　TiO2　coating,　and　can　be　considered　as　the　coating　of　the　316SS　structure　material　for　a　MS　SCWO　reactor.　(C)　2019　Elsevier　B.V.　All　rights　reserved.