Hot　corrosion　experiments　of　alloy　TP347HFG　under　different　stresses　were　conducted.　Corroded　specimens　were　examined　by　means　of　corrosion　products,　morphology　and　compositional　changes　in　corrosion　scales.　The　corrosion　behavior　was　strongly　associated　with　the　formation　of　oxides　layers.　The　corrosion　resistance　was　strengthened　by　the　external　stress.　It　seemed　that　the　exertion　of　stresses　caused　many　micro　cracks　and　defects,　which　acted　as　faster　and　easier　diffusion　paths　for　Cr　atoms　to　diffuse　to　the　surface,　and　thus,　promote　faster　formation　of　the　protective　Cr2O3　oxide　layer.　Critical　stress　40　MPa　was　found,　specimens　under　which　present　the　best　resistance.　(C)　2015　Elsevier　Ltd.　All　rights　reserved.