کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1256176 971457 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure and corrosion behavior of electroless deposited Ni–P/CeO2 coating
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Microstructure and corrosion behavior of electroless deposited Ni–P/CeO2 coating
چکیده انگلیسی

Electroless Ni–P/nano-CeO2 composite coating was prepared in acidic condition, and its microstructure and corrosive property were compared with its CeO2-free counterpart. Scanning electronic microscopy (SEM) and X-ray diffraction (XRD) spectrometer were used to examine surface morphology and structure of the as-plated coating. Differential scanning calorimeter (DSC) and transmission electronic microscopy (TEM) were used to study the coating’s phase change at high temperature. The coating’s corrosive behavior in 3%NaCl + 5%H2SO4 solution was also investigated. The results showed that Ni–P coating had partial amorphous structure mixed with nano-crystals, while the Ni–P/CeO2 coating had perfect amorphous structure. In high-temperature condition, Ni3P precipitation and Ni crystallization took place in both coatings but at different temperatures, while the Ni–P/CeO2 coating had sintered phase of NiCe2O4 spinels. The anti-corrosion property was better in the CeO2-containing coating, and this was due to its less liability to undergo local-cell corrosion than its CeO2-free counterpart. Ni–P/CeO2 coating’s pure amorphous structure was the result of Ni’s hindered crystal-typed deposition and P’s promoted deposition.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Chemical Letters - Volume 19, Issue 11, November 2008, Pages 1367–1370
نویسندگان
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