کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11003503 1460480 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Corrosion inhibition of carbon steel by hydrotalcites modified with different organic carboxylic acids for organic coatings
ترجمه فارسی عنوان
مهار خوردگی فولاد کربن توسط هیداللکسیت های اصلاح شده با اسیدهای کربوکسیلیک آلی مختلف برای پوشش های آلی
کلمات کلیدی
هیدروتالسیت، مهار کننده خوردگی آلی، کربوکسیلات، حفاظت در برابر خوردگی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
Hydrotalcites intercalated with sebacate (HT-SB) were prepared by a coprecipitation method. The synthesized powder was characterized using infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM) and zeta potential measurements. The inhibitor release from HT-SB in a chloride solution has been determined by total organic content (TOC) analysis. The inhibitive action of HT-SB on carbon steel was investigated and compared with hydrotalcites intercalated by benzoate (HT-BZ) and 2-benzothiazolythio-succinic acid (HT-BTSA) using electrochemical measurements and SEM/EDX analysis. The results showed that the zeta potential of modified hydrotalcites and the release of corrosion inhibitors from modified hydrotalcites depend on the chemical structure of inhibitors. The anodic polarization curves showed that the three modified hydrotalcites behave as anodic corrosion inhibitors with an efficiency, at a concentration of 3 g/L, of 94% for HT-SB, 81% for HT-BZ and 92% for HT-BTSA. These efficiencies are higher than those measured for the organic inhibitors in chloride solutions highlighting a synergistic effect due to the combination of the hydrotalcite structure and carboxylate inhibitors. The inhibition effect of modified hydrotalcite depends not only on the intercalated organic inhibitors but also on the capability of adsorption of the hydrotalcite structure on a steel surface. HT-SB was easily dispersed in an epoxy coating improving the barrier properties at concentrations lower than 5 wt.%. The best protection was obtained with 1.5 wt.% HT-SB.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Organic Coatings - Volume 124, November 2018, Pages 256-266
نویسندگان
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