أستخدام مستخلص التبغ كمثبط تآكل صديق للبيئة لحماية الانابيب الفولاذية في التربة
DOI:
https://doi.org/10.52716/jprs.v15i1.873الكلمات المفتاحية:
low carbon steel, Tafel polarization, inhibition efficiency, Tobacco extract, corrosion rate.الملخص
يهدف البحث الى حل مشكلة التآكل في الانابيب الفولاذية المدفونة في التربة من خلال استخدام مستخلص التبغ لعينات من الفولاذ منخفض الكاربون لغرض بيان تأثيره على معدل التآكل ومدى فعاليته بأستخدام محلول مائي يحاكي مواصفات التربة المستخدمة بمقاومة قريبة من مقاومة التربة ورقم هيدروجيني pH=6.8 عند درجة حرارة 30°م واستخدام عينات من الفولاذ منخفض الكاربون والتي تستخدم في الصناعات البترولية والمتوفرة محليا. أستخدمت طريقة تافل بأستخدام جهازالمجهاد الساكن Potentiostate لقياس معدلات التآكل: جهد التآكل، تيار التآكل، ومعدلات التآكل لغرض معرفة كفاءة التثبيط واستكمال حسابات خلية التآكل في درجة حرارة ثابتة 30°م. وكانت النتائج للعينات المغمورة بمستخلص التبغ تيارات التآكل اقل من العينات غير المغمورة في كل من شهر من حزيران الى تشرين الثاني وكانت العينات المغمورة اقل معدل تآكل في شهرحزيران (بعد 60 يوم من الغمر في التربة) وكان معدل التاكل 0.02237 mpy مقارنة بالعينة المستلمة 5.6168 mpy عند كفاءة التثبيط 99.6% في شهرحزيران. واصبح معدل التاكل 3.2083 mpy عند كفاءة تثبيط 42.88% في شهرتشرين الثاني وذلك بسبب تكون طبقة واقية على سطح الفولاذ تقلل من معدل التآكل بسبب امتصاص الماء وايونات الكلوريد الموجودة.
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