Hot corrosion of Inconel 625 wrought alloy and weld overlay on carbon steel by gas metal arc welding in 47 PbSO4-23 ZnO-13 Pb3O4-7 PbCl2-5 CdO-5 Fe2O3 molten salt mixture

被引:20
作者
Zahrani, E. Mohammadi [1 ]
Alfantazi, A. M. [2 ]
机构
[1] Ferdowsi Univ Mashhad, Fac Engn, Dept Met & Mat Engn, Mashhad 917751111, Razavi Khorasan, Iran
[2] Khalifa Univ Sci & Technol, Dept Chem Engn, POB 2533, Abu Dhabi, U Arab Emirates
基金
加拿大自然科学与工程研究理事会;
关键词
C; Welding; Hot corrosion; A; Molten salts; Superalloys; B; EIS; SEM; HIGH-TEMPERATURE CORROSION; ELECTROCHEMICAL-BEHAVIOR; OXIDE-FILMS; SOLIDIFICATION; ENVIRONMENT; SUPERALLOYS; RESISTANCE; COATINGS; FE; CR;
D O I
10.1016/j.corsci.2021.109348
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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 ?m in thickness. Anodic and cathodic reactions on polarized working electrodes were under mass-transfer control.
引用
收藏
页数:19
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