نویسندگان
1 گروه مواد، واحد نجف آباد، دانشگاه آزاد اسلام ی، نجف آباد، ایران
2 گروه شیمی، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران
چکیده
خوردگی و بازدارندگی خوردگی فولاد ساده کربنی CK10 در محلول %3 کلرید سدیم اشباع از گاز CO2 توسط عصاره انیسون (AE) محلول در اتیلن گلایکل (EG) بوسیله نمودارهای پلاریزاسیون، طیف‌سنجی امپدانس الکتروشیمیایی (EIS) و روش آنالیز سطحی AFM مورد بررسی قرار گرفت. بازده بازدارندگی با افزایش غلظت عصاره انیسون و دما افزایش یافت. نتایج نشان می‌دهد که عصاره‌ی انیسون به عنوان یک بازدارنده از طریق مکانیزم مختلط عمل می‌نماید و فرآیند بازدارندگی به تشکیل یک فیلم جذب شونده شیمیایی از AE و EG بر روی سطح فلز از طریق موقعیت‌های جذب چند مرکزی نسبت داده می‌شود. پارامترهای ترمودینامیکی جذب بازدارنده با استفاده از ایزوترم جذب لانگمیر محاسبه شد. مطالعات مورفولوژیکی از سطح الکترود فولاد ساده کربنی توسط میکروسکوپ نیروی اتمی( AFM) انجام شد.
کلیدواژه‌ها
عنوان مقاله [English]
Effect of Anise Extract as Green Corrosion Inhibitor Carbon Steel in CO2-Containing Salt
نویسندگان [English]
- Amin Peimani 1
- Mojtaba Nasr-Esfahani 2
- Ehsan Saebnoori 1
1 Department of Materials, Najafabad Branch, Islamic Azad University, Najafabad, Iran
2 Department of Chemistry, Najafabad Branch, Islamic Azad University, Najafabad, Iran
چکیده [English]
The corrosion and corrosion inhibition of CK10 carbon steel in CO2-saturated 3% NaCl solution by anise
extract (AE) dissolved in ethylene glycol (EG) was studied using polarization curves, electrochemical impedance
spectroscopy (EIS) and surface analysis (AFM) methods. Inhibition efficiency increased with increase in AE
concentration and temperature. The data suggest that AE functioned as inhibitor via a mixed-inhibitor mechanism and
the inhibition process is attributed to the formation of a chemically adsorbed film of AE and EG on the surface of the
metal via its polycentric adsorption sites. Thermodynamic adsorption parameters of studied inhibitor were calculated
using the Langmuir adsorption Isotherm. Morphological studies of the carbon steel electrode surface were undertaken
by atomic force microscopy (AFM).
کلیدواژه‌ها [English]
- CK10 carbon steel
- CO2 corrosion
- Inhibitor
- Anise extract
- Ethylene glycol
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