کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8029462 | 1517646 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Formation and electrochemical properties of the superhydrophobic nanocomposite coating on PEO pretreated Mg-Mn-Ce magnesium alloy
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کلمات کلیدی
magnesium alloys - آلیاژهای منیزیمContact angle measurements - اندازه گیری زاویه تماسPlasma electrolytic oxidation - اکسیداسیون الکترولیتی پلاسماElectrochemical impedance spectroscopy - طیف سنجی امپدانس الکتروشیمیاییCorrosion resistance - مقاومت در برابر خوردگیSuperhydrophobic coating - پوشش سوپر هیدروفوفوبیک
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper describes the methods of preparation and electrochemical properties of hydrophobic (HP) and superhydrophobic (SHP) nanocomposite coatings on the surface of magnesium alloy pretreated using plasma electrolytic oxidation (PEO). The most effective corrosion protection in brine solutions among the coatings under study was demonstrated by the nanocomposite superhydrophobic coating. For this coating, the values of the contact and rolling angles are 166° ± 3° and 5° ± 3°, respectively. The impedance modulus (|Z|f = 0.005) value, which characterizes the anticorrosion properties, attains 2.5 â 107 Ω Ñm2 for the SHP coating and 1.4 â 106 Ω Ñm2 for the HP coating at the initial moment of immersion into a chloride-containing electrolyte, thus improving the resistance of the base PEO coating by almost 400 and 20 times, respectively. After 24 h of exposure, the protective properties of the SHP coatings are one order of magnitude higher than those of the HP coatings. The high corrosion resistance and considerable stability of the SHP coatings during their operation result from a small area of real contact with aggressive media due to a heterogeneous wetting regime and formation of a firm chemical bond between the molecules of the hydrophobic agent and the other coating components.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 232, 15 October 2013, Pages 240-246
Journal: Surface and Coatings Technology - Volume 232, 15 October 2013, Pages 240-246
نویسندگان
S.V. Gnedenkov, V.S. Egorkin, S.L. Sinebryukhov, I.E. Vyaliy, A.S. Pashinin, A.M. Emelyanenko, L.B. Boinovich,