مقایسه روش‌های تحلیلی نویز الکتروشیمیایی در مطالعه رفتار خوردگی فولاد کربنی در دی اتانول آمین

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی متالورژی و مواد، پردیس دانشکده‌های فنی، دانشگاه تهران، ایران

2 شرکت پالایش گاز سرخون و قشم، ایران

چکیده

روش نویز الکتروشیمیایی از جمله روش‌های مطالعه رفتار خوردگی می‌باشد که با توجه به قابلیت‌های خاص آن در تشخیص مکانیزم خوردگی مورد توجه بسیاری از پژوهشگران بوده است. برای استفاده از این تکنیک روش‌های تحلیلی مختلفی استفاده شده است که در برخی موارد اختلاف‌های اساسی در نتایج آنها مشاهده می‌شود. برای بررسی بیشتر این تفاوت‌ها در این پژوهش از روش‌های تعیین شاخص موضعی شدن، آنالیز موجک و شیب نمودار PSD برای مطالعه رفتار خوردگی فولاد کربنی در محلول آبی دی اتانول آمین حاوی مقادیر مختلف H2S و CO2 استفاده شده است و مشخص شد که روش‌های شاخص موضعی شدن و آنالیز موجک سازگاری بسیار بالایی را نشان می‌دهند، اما تغییرات شیب PSD روند مشخص و منطقی را نشان نمی‌دهد. با مقایسه نتایج آزمون پلاریزاسیون و مقاومت نویز هم مشاهده می‌شود که اگرچه روند تغییرات مقاومت نویز و مقاومت پلاریزاسیون تقریباً مشابه هستند، اما مقادیر مطلق نرخ خوردگی عمومی حاصل از این دو روش برابر نمی‌باشد.
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

An Investigation of Electrochemical Noise Analytical Methods in the Study of Carbon Steel Corrosion Behavior in Diethanolamine

نویسندگان [English]

  • Ahamad Ranjbar 1
  • Saeed Reza Allahkaram 1
  • Amir Reza Rashidfarokhi 2
1 School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Iran
2 Sarkhoon and Qeshm Gas Treating Company
چکیده [English]

Electrochemical noise measurement is considered by many researchers as one of the most well-known methods for studying corrosion mechanism due to its broad capabilities. Various analytical methods have been applied to use this technique, while in some cases; some discrepancies have been being detected in their obtained results. To further investigate these differences, various techniques consisting of localized index, wavelet transform and the slope of PSD were utilized to study corrosion behavior of carbon steel in diethanolamine aqueous solution containing different concentrations of absorbed H2S and CO2 gases. It was found that the localized index and wavelet analytical techniques were in a good agreement, while the slope of PSD changes did not indicate a logical trend. By making a comparison between the polarization test results and the noise resistance results, it could be deduced that although the trend of noise and polarization changes were quite similar, but the absolute values of corrosion rates were not equal.

کلیدواژه‌ها [English]

  • Carbon Steel
  • Electrochemical Noise
  • Diethanolamine
  • Wavelet
  • Corrosion

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