دانلود رایگان ترجمه مقاله عصاره برگ آکالیفا تورتا به عنوان بازدارنده خوردگی سبز – ACS 2012
دانلود رایگان مقاله انگلیسی عصاره برگ آکالیفا تورتا به عنوان بازدارنده خوردگی سبز برای فولاد نرم در محلول هیدروکلریک اسید به همراه ترجمه فارسی
عنوان فارسی مقاله: | عصاره برگ آکالیفا تورتا به عنوان بازدارنده خوردگی سبز برای فولاد نرم در محلول هیدروکلریک اسید |
عنوان انگلیسی مقاله: | Acalypha torta Leaf Extract as Green Corrosion Inhibitor for Mild Steel in Hydrochloric Acid Solution |
رشته های مرتبط: | شیمی، شیمی تجزیه، شیمی معدنی، شیمی آلی و شیمی کاربردی |
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نشریه | ACS |
کد محصول | f222 |
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بخشی از ترجمه فارسی مقاله: ۳٫۲٫۳٫ اندازه گیری های کرونوآمپرومتری : ۳٫۳٫ مطالعات مورفولوژیکی سطح : ۴٫۳٫ مکانیزم بازداری : |
بخشی از مقاله انگلیسی: ۳٫۲٫۳٫ Chronoamperometric Measurements. In order to verify the ability of EAL to inhibit anodic processes of mild steel, the chronoamperometric experiments were carried out by polarizing anodically the electrode potential at −۰٫۴۱ V (vs SCE) for 600 s. the current density values obtained during the electrooxidation of mild steel were recorded in 1 M HCl in the absence and presence of 1000 ppm EAL. The chronoamperometric curves are depicted in Figure 7. By considering the current density values in the absence and presence of 1000 ppm EAL, the protection efficiency was calculated around 90%.39 Hence, it can be concluded that the extract act as an efficient corrosion inhibitor for mild steel in 1 M HCl. ۳٫۳٫ Surface Morphological Studies. The SEM images (Figure 8) of mild steel immersed in 1 M HCl solution in the absence and presence of 1000 ppm EAL were recorded to establish the interaction of extract with the metal surface. Itcould be observed from the Figure 8A that the specimen surface was strongly damaged in the absence of the extract and the surface is rough and highly porous. Whereas in the presence of EAL (Figure 8B), the specimen is in better condition having smooth surface compared with that of the surface immersed in acid medium alone which is attributed to the formation of a protective layer by the constituents of EAL. This indicates that EAL hinders the dissolution of iron and there by reduces the rate of corrosion of mild steel in 1 M HCl solution. ۳٫۴٫ Mechanism of Inhibition. The weight loss and electrochemical experiments reveals that the corrosion of mild steel is retarded in the presence of different concentration of EAL. The inhibitor molecules present in the extract blocks the surface of mild steel via adsorption mechanism. The Acalypha species contain high concentrations of polyphenols, terpenoids, and plant sterols, and these organic compounds contains fused benzene rings and O heteroatoms in the rings.40 The values of thermodynamic parameters indicated that the adsorption of EAL on mild steel surface involves a physisorption. The macromolecules present in the extract get electrostatically adsorbed on the mild steel surface by donor−acceptor interactions between the π electrons of fused benzene rings and the vacant d-orbital of iron atoms |