کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
693468 | 889883 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Protective abilities of nanocomposite coatings containing Al2O3 nano-particles loaded by CeCl3
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Protective abilities of nanocomposite coatings containing Al2O3 nano-particles loaded by CeCl3 Protective abilities of nanocomposite coatings containing Al2O3 nano-particles loaded by CeCl3](/preview/png/693468.png)
چکیده انگلیسی
The protective ability of hybrid nano-composite oxysilane coatings, deposited via sol-gel method on AA2024-T3 - aluminium alloy, were studied by linear voltammetry (LVA) and electrochemical impedance spectroscopy (EIS) methods in 0.05 M solution of NaCl. Cerium chloride (CeCl3) was incorporated as an inhibitor into a sol-gel hybrid matrix in two different routes: directly and via filled porous Al2O3 nano-particle aggregates with diameters up to 500 nm. The influences of the inhibitor concentration, as well as the influence of nano-particles on the barrier properties and the susceptibility against corrosion, were evaluated and EIS spectra were fitted by appropriated equivalent circuits. The values for Ccoat, Rcoat, Coxy and Roxy were achieved and their evolution over time was investigated. The investigated coatings possess highly expressed barrier properties (106 to 107 Ω cm2). Despite of the chloride ions inside of the matrix, some samples illustrated a significant durability of over 4000 h during exposure to the corrosion medium before first signs of corrosion appeared. The electrochemical results were compared with the neutral salt spray test. Thus, it was proved that the potential of these coatings is to be used as anticorrosive protective materials and are candidate to replace Cr(VI)-based anti-corrosion coatings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Organic Coatings - Volume 71, Issue 2, June 2011, Pages 198-205
Journal: Progress in Organic Coatings - Volume 71, Issue 2, June 2011, Pages 198-205
نویسندگان
S. Kozhukharov, V. Kozhukharov, M. Wittmar, M. Schem, M. Aslan, H. Caparrotti, M. Veith,