کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1469499 1510030 2012 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Molten salt induced corrosion of Inconel 625 superalloy in PbSO4–Pb3O4–PbCl2–Fe2O3–ZnO environment
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Molten salt induced corrosion of Inconel 625 superalloy in PbSO4–Pb3O4–PbCl2–Fe2O3–ZnO environment
چکیده انگلیسی

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.


► Alloy 625 presented active dissolution behavior.
► Anodic film was characterized as a porous, non-protective corrosion product layer.
► General and intergranular corrosion together with voids and pores formation occurred.
► Internal oxidation and sulfidation were different modes of hot corrosion attack.
► EIS data fit to a porous and non-protective barrier layer electrochemical model.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Corrosion Science - Volume 65, December 2012, Pages 340–359
نویسندگان
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