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The effect of molecular weight on the corrosion protection properties of polyvinylpyrrolidone polymers on stainless steel
Author
Source
The Arabian Journal for Science and Engineering. Section A, Science
Issue
Vol. 35, Issue 1A (31 Jan. 2010), pp.30-39, 10 p.
Publisher
King Fahd University of Petroleum and Minerals
Publication Date
2010-01-31
Country of Publication
Saudi Arabia
No. of Pages
10
Main Subjects
Topics
Abstract AR
تعنى هذه الدراسة باستقصاء آثار مثبطات بولي – فينيل – بايروليدون PVP10 (Mo1.Wt.
100000) و PVP45 (Mo1.Wt 45000) في خصائص التآكل للفولاذ المقاوم للصدأ (316L) في تركيزات مثبط مختلفة، و عند درجات حرارة مختلفة.
و قد استخدمت تقنيات الكهروكيميائية لتحديد خصائص التآكل، و وجدنا أن أثر التثبيط يزداد مع ازدياد الوزن الجزيئي.
و بلغ أدنى معدل للتآكل 0.351 µmy في حالة 0.005M PVP45 و بلغ 6.63 µmy في حالة 0.01M PVPV10.
و قد أظهرت (Ecorr) زيادة في التآكل مع التركيز المتزايد للمثبط.
و بلغ التآكل ذروته (0.26V) بعد 72 ساعة في حالة 0.01M PVP10 مقارنة بـ (0.32V) في حالة 0.005M PVPV45.
و مع ذلك، فإن منحنى PVP45 أظهر عدم الاستقرار في فترات مختلفة من الوقت مما يدل على تكرار الانحلال / عمليات التخميل.
كما أظهرت صور أل (SEM) تشكيل الحفر بخاصة في حالة الأوزان الجزيئية المنخفضة من البوليمرات و أقل حفر عند حرارة 60˚C في حالة PVP45.
Abstract EN
The inhibitive effects of polyvinylpyrrolidone PVP10 (Mol.
Wt.
10,000) and PVP45 (Mol.
Wt 45,000) on the corrosion properties of 316L stainless steel at different inhibitor concentrations and temperatures were investigated.
Electrochemical techniques were used to determine the corrosion properties.
The inhibition effect of the polypyrrolidone was found to increase with the molecular weight.
The lowest corrosion rate of 0.005M PVP45 reached 0.351 μmy, whereas the lowest corrosion rate for a 0.01M PVP10 was 6.63 μmy.
E corr showed an increase in corrosion potential with increasing concentration of the inhibitor.
The corrosion potential for a 0.01M PVP10 reached a maximum of 0.26V after 72 hours compared to 0.32V for 0.005M PVP45.
However, the curve of the PVP45 showed instability at different intervals of time indicative of frequent dissolutions / passivation processes.
SEM reveals the formation of pits especially at low molecular weight of the polymers and fewer pits at 60oC in the case of PVP45..
American Psychological Association (APA)
Khalid, Mazin M.. 2010. The effect of molecular weight on the corrosion protection properties of polyvinylpyrrolidone polymers on stainless steel. The Arabian Journal for Science and Engineering. Section A, Science،Vol. 35, no. 1A, pp.30-39.
https://search.emarefa.net/detail/BIM-308397
Modern Language Association (MLA)
Khalid, Mazin M.. The effect of molecular weight on the corrosion protection properties of polyvinylpyrrolidone polymers on stainless steel. The Arabian Journal for Science and Engineering. Section A, Science Vol. 35, no. 1A (Jan. 2010), pp.30-39.
https://search.emarefa.net/detail/BIM-308397
American Medical Association (AMA)
Khalid, Mazin M.. The effect of molecular weight on the corrosion protection properties of polyvinylpyrrolidone polymers on stainless steel. The Arabian Journal for Science and Engineering. Section A, Science. 2010. Vol. 35, no. 1A, pp.30-39.
https://search.emarefa.net/detail/BIM-308397
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 38-39
Record ID
BIM-308397