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Abstract The hot corrosion resistance of the wrought alloy 625 and the alloy 625 GMAW cladding was investigated in the molten salt mixture of 47 PbSO4-23 ZnO-13 Pb3O4-7 PbCl2-x CdO-(10-x)… Click to show full abstract
Abstract The hot corrosion resistance of the wrought alloy 625 and the alloy 625 GMAW cladding was investigated in the molten salt mixture of 47 PbSO4-23 ZnO-13 Pb3O4-7 PbCl2-x CdO-(10-x) Fe2O3 [x = 5] (wt.%) at 600, 700, and 800 °C, utilizing EIS, OCP, potentiodynamic polarization, weight-loss measurement, SEM/EDX, ICP/AAS, and XRD techniques. At 600 °C, the hot corrosion resistance of the wrought alloy 625 outperformed the alloy 625 weld cladding due to the formation of a (Cr, Ni, O)-rich layer with 2.2 ± 1.3 μm in thickness. Anodic and cathodic reactions on polarized working electrodes were under mass-transfer control.
Journal Title: Corrosion Science
Year Published: 2021
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