کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
769825 1463001 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analyses of defects on the surface of hot plates for an electric stove
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Analyses of defects on the surface of hot plates for an electric stove
چکیده انگلیسی

Brown stains were observed forming after the black-oxide coating on the surfaces of grey-cast-iron hot plates made for an electric stove. These stains were metallographically examined using a scanning electron microscope (SEM) equipped with an energy-dispersive X-ray spectrometer (EDXS). For the phase identification we also employed X-ray diffraction (XRD) analyses. The results indicated that the stained surfaces of the hot plates were covered with whiskers of hematite (Fe2O3), while on the surfaces of the non-defective hot plates only magnetite (Fe3O4) was present. The thermodynamic calculations confirmed the possibility of the formation of hematite (Fe2O3) as a result of the oxidation of magnetite (Fe3O4) if the partial pressure of oxygen is increased during the black-oxide-coating process.


► Brown stains on the hot plates for the electric stove have been analysed.
► The stains are caused by whiskers that were growing from the top oxide layer.
► Whiskers are from hematite, while non-defective surface is from magnetite.
► For proper black coating a control of the partial pressure of oxygen is necessary.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Failure Analysis - Volume 23, July 2012, Pages 82–89
نویسندگان
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