Molten salt induced corrosion of Inconel 625 superalloy in PbSO4–Pb3O4–PbCl2–Fe2O3–ZnO environment
Molten salt induced corrosion of Inconel 625 superalloy in PbSO4–Pb3O4–PbCl2–Fe2O3–ZnO environment
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DOI：
10.1016/j.corsci.2012.08.035
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发表时间：
2012-12
影响因子：
8.3
通讯作者：
E. M. Zahrani;A. Alfantazi
中科院分区：
文献类型：
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作者：
E. M. Zahrani;A. Alfantazi
研究了625合金在47pbso4 - 23zno - 13pb3o4 - 10fe2o3 - 7pbcl2熔盐中的腐蚀行为。%)在600、700和800°C的空气气氛下，利用OCP、动电位极化、EIS和失重测量技术。采用XRD、SEM/EDX、ICP/AAS等手段对腐蚀产物和水垢进行了相结构、形貌和化学分析。一般的表面腐蚀、晶间腐蚀、孔洞的形成以及表面和截面上分布的孔洞网络，加上内部氧化和硫化，被认为是不同的腐蚀模式。EIS数据符合多孔和非保护性阻挡层电化学模型。
Corrosion behavior of alloy 625 was studied in a molten salt consisting of 47PbSO4–23 ZnO–13 Pb3O4–10Fe2O3–7PbCl2(wt.%) under air atmosphere at 600, 700 and 800°C, utilizing OCP, potentiodynamic polarization, EIS and weight-loss measurement techniques. Phase structure, morphology and chemical analysis of corrosion products and scales were characterized by means of XRD, SEM/EDX, and ICP/AAS. General surface corrosion, intergranular corrosion, formation of voids and, a network of distributed pores on surface and cross-section, plus internal oxidation and sulfidation were identified as different modes of corrosion attack. EIS data fit to a porous and non-protective barrier layer electrochemical model.