کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1787143 1023433 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of graphite additives in electrolytes on the microstructure and corrosion resistance of Alumina PEO coatings
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Effects of graphite additives in electrolytes on the microstructure and corrosion resistance of Alumina PEO coatings
چکیده انگلیسی

In the present work, graphite grains of different sizes were added into the electrolyte to prepare ceramic coatings on aluminum by plasma electrolytic oxidation (PEO). Scanning electron microscopy (SEM) coupled with an energy dispersive X-ray analysis system (EDX), Raman spectroscopy and X-ray diffractometer (XRD) were used to characterize the coatings. A three-electrode system was used to evaluate the corrosion performances of the coatings in a 3.5 wt.% NaCl solution. It was found that the morphology and corrosion performance of the coatings were significantly influenced by the size of the graphite grains. Compared with bigger graphite grains, finer ones were involved in the oxidation process and embedded within the ceramic coatings, which made the coatings less porous and more compact. Thus, the corrosion resistance of the coatings with embedded graphite grains was greatly improved.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 9, Issue 2, March 2009, Pages 324–328
نویسندگان
, , , , , , , ,