کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
617112 | 1454975 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Erosion-corrosion behavior of cold-spray nanostructured Ni-20Cr coatings in actual boiler environment
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In the current investigation erosion-corrosion (E-C) behavior of cold-spray nanostructured Ni-20Cr coatings on SAE-213-T22 and SA 516-Grade 70 steels, under actual boiler environment was evaluated. A nanostructured Ni-20Cr powder was synthesized using a ball milling technique by the investigators. The specimens with and without coating were exposed to super heating zone of a power plant boiler at 750 °C under cyclic conditions for 15 cycles. Each cycle consisted of 100 h of heating followed by 1 h of cooling. The mass change and thickness loss data of the samples were used to study the kinetics of E-C. XRD, SEM/EDS, and X-ray mappings analyses were used to characterize the eroded-corroded samples. The coating was found to reduce the E-C rate of T22 and SA 516 steels by 100% in terms of thickness loss. Moreover, the investigated nanostructured Ni-20Cr coating was found to be more effective to reduce the E-C rates of the steels in comparison with its conventional micron-size counterpart. Erosion-corrosion resistance shown by the investigated coating under actual boiler conditions may be attributed to the presence of protective NiO and Cr2O3 phases in its oxide scale and its superior as-sprayed microhardness.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Wear - Volumes 332â333, MayâJune 2015, Pages 1035-1043
Journal: Wear - Volumes 332â333, MayâJune 2015, Pages 1035-1043
نویسندگان
Manoj Kumar, Harpreet Singh, Narinder Singh, Ravinder Singh Joshi,