Corrosion Behavior of Several Alloys in Supercritical Water Oxidation Environment at 450 ℃/23 MPa
The corrosion behavior of four typical Ni-based corrosion-resistant alloys in supercritical aqueous solution containing Na3PO4,Na2SO4,and NaCl at 450 ℃/23 MPa was studied by XRD,SEM,etc.The results show that after corrosion for 50 h,the surface of the alloys is covered by short rod-shaped and needle-shaped products mainly consisting of NiCr2O4,Cr203,NiO,Ni3(PO4)2,CrPO4,and Na3PO4.With prolonging the time,the thickness of the corrosion layers is increased and the corrosion resistance is ranked as X-1#＞X-2#＞625＞C-276.
nickel-based alloysupercritical water oxidationcorrosion behavior
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