کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5465135 | 1517560 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical studies of Ir coating deposition from NaCl-KCl-CsCl molten salts
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this paper, the electrochemical behavior of Ir3 + ions in melting NaCl-KCl-CsCl-IrCl3 and the major kinetic parameters were investigated by transient and steady electrochemical techniques from 823 K to 913 K. Effects of the electrochemistry of Ir3 + ions on the microstructure of Ir coatings were also discussed. The electrochemical reduction of Ir3 + ions from the melts was the diffusion-controlled and irreversible reaction with exchange of three electrons at 823-883 K and converted to be a quasi-reversible one with the temperature increasing to 913 K. The major kinetic parameters of Ir3 +/Ir couples, the diffusion coefficient D0 and exchange current density j0, respectively increased from 2.4 Ã 10â 6 cm2/s to 9.2 Ã 10â 6 cm2/s and from 5 mA/cm2 to 16 mA/cm2 with the temperature. With the temperature and applied cathodic potential decreasing, the microstructure of Ir coatings converted from the coarse and preferential oriented columnar grain structure to the fine and unoriented dispersive grain structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 322, 15 August 2017, Pages 76-85
Journal: Surface and Coatings Technology - Volume 322, 15 August 2017, Pages 76-85
نویسندگان
Yongle Huang, Shuxin Bai, Hong Zhang, Yicong Ye, Li''an Zhu,