کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1662512 1517706 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancement of the erosion–corrosion resistance of Dacromet with hybrid SiO2 sol–gel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Enhancement of the erosion–corrosion resistance of Dacromet with hybrid SiO2 sol–gel
چکیده انگلیسی

A hybrid SiO2 gel/Dacromet composite coating system was designed and prepared by brushing technique from nano-scale organofunctional silica sol on Dacromet-coated carbon steel to enhance the erosion–corrosion resistance of the Dacromet. This particular silica sol was synthesized by the acid catalyzed hydrolysis with TEOS (tetraethoxysilane) and γ-MAPTS (γ-Methacryloxypropyltrimethoxysilane) in an ethanol medium. The silica particles showed a characteristic shape due to the intertwisting of the organic chain. The hybrid SiO2 gel/Dacromet composite coating system exhibited a mass loss rate with 4.5 times lower than that of single Dacromet in the simplified industrial medium (3.5% NaCl, 35 wt.% sand and distilled water). A crack-free surface was observed for the hybrid SiO2 gel/Dacromet system due to the incorporation of an organic group during the preparation process so as to produce a restrained synergistic effect of erosion and corrosion. The nano-particles in SiO2 sols did enter into the micro-defects of Dacromet as confirmed by SEM. The change in IR spectra indicated a chemical covalent bond between the gel film and Dacromet through certain reactions. The electrochemical measurement showed that the composite system also presented a longer controlled cathodic protection than that of Dacromet and an enhanced corrosion resistance for Dacromet.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 200, Issues 16–17, 27 April 2006, Pages 4967–4975
نویسندگان
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