کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8011855 | 1516930 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Corrosion behavior of hafnium in anhydrous isopropanol and acetonitrile solutions containing bromide ions
ترجمه فارسی عنوان
رفتار خوردگی هوفنیوم در ایزوپروپانول بی آب و راه حل های استونیتریل حاوی یون های برومید
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
چکیده انگلیسی
The corrosion behaviors of hafnium in Et4NBr isopropanol and acetonitrile(ACN) solutions were investigated using electrochemical measurements, ICP-AES and SEM techniques. Results revealed that the open circuit potential gets more positive due to the increased passivity of the surface oxide film with increasing immersion time until it reaches a steady state value. The potentiodynamic anodic polarization curves did not exhibit an active dissolution region near corrosion potential due to the presence of an oxide film on the electrode surface, which was followed by pitting corrosion. SEM images confirmed the existence of pits on the electrode surface. Cyclic voltammetry and galvanostatic measurements allowed the pitting potential (Ïpit) and the repassivation potential (Ïp) to be determined. Ïpit increased with increasing potential scanning rate but decreased with increasing temperature, Brâ concentration and ACN concentration. The impedance spectra showed that the resistances of the solution and charge transfer decreased with the increase of ACN concentration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 27, Issue 8, August 2017, Pages 1896-1906
Journal: Transactions of Nonferrous Metals Society of China - Volume 27, Issue 8, August 2017, Pages 1896-1906
نویسندگان
Chang-hong WANG, Sheng-hai YANG, Yi YUAN, Yong-ming CHEN, Biao WANG, Jing HE, Chao-bo TANG,