کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1662438 | 1517698 | 2007 | 7 صفحه PDF | دانلود رایگان |
Sol–gel alumina coatings were deposited on medical grade stainless steel (AISI 316L) with an intermediate layer of silica by dip-coating method. The coatings obtained were homogeneous, crack-free and consisted of low crystalline γ-Al2O3 along with some boehmite phase. EDAX revealed the presence of only Al in the film. The corrosion performance of alumina-coated stainless steel was evaluated by electrochemical polarization, open-circuit potential measurement and chronoamperometry in Ringer's solution. Coating has shown to enhance the pitting potential of AISI 316L by ∼ 470 mV and reduced passive current ≤ 10− 9 A cm− 2. The formation of thermodynamically stable silica–alumina interface was proposed to account for enhanced corrosion protection behaviour of the coating.
Journal: Surface and Coatings Technology - Volume 201, Issues 16–17, 21 May 2007, Pages 7582–7588