2024 - Sustainable Industrial Processing Summit
SIPS 2024 Volume 16. Intl. Symp on Electrochemistry, Molten Salts, Corrosion, Recycling and Battery
| Editors: | F. Kongoli, C.A. Amatore, R. Fehrmann, G. Kipouros, I. Paspaliaris, G. Saevarsdottir, R. Singh, R. Gupta, M. Halama, D. Macdonald, F. Wang, M. Barinova, F. Ahmed, C. Gaidau, X. Guo, K. Kolomaznik, H. Ozgunay, K. Tang, N.N. Thanh, S. Yefremova, K. Aifantis, Z. Bakenov, C. Capiglia, V. Kumar, A. U. H. Qurashi, A. Tressaud, R. Yazami |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2024 |
| Pages: | 243 pages |
| ISBN: | 978-1-998384-34-1 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
CD shopping page
ELECTROCHEMICAL BEHAVIOUR OF (NH4)2TiF6 AND NH4BF4 IN ACETAMIDE MELTS
Sergei Devyatkin1; Fan Meng1; Peixia Yang1;1HARBIN INSTITUTE OF TECHNOLOGY, Harbin, China;
Type of Paper: Regular
Id Paper: 343
Topic: 13
Abstract:
Acetamide has a valuable combination of properties which are only beginning to be recognized. Besides low cost and many convenient physical properties, it is also highly polar and has an enthalpy of fusion comparable to that of many inorganic salts which makes it a potential phase change heat storage material. Moreover, in the molten phase it is an excellent solvent for both organics and, particularly, for many inorganic salts. Acetamide melts have found applications as electrolytes for electrochemical treatment of metals [1, 2]. The possibility of electrochemical synthesis of refractory compounds from acetamide melts at 120°С has been examined for Ti-B as an example. In the binary system CH3CONH2–(NH4)2TiF6 a new process, which is more electropositive than the decomposition of acetamide and more electronegative than the acetamide discharge has been observed. The scan rate independence of potential characterizes the observed processes as reversible charge transfer. This process corresponds to the one-electron irreversible charge exchange: Ti(IV)/Ti(III). In the binary system CH3CONH2–NH4BF4 only the decomposition of carbamide has been observed. In the ternary system CH3CONH2–(NH4)2TiF6–NH4BF4 a new process, which is more electropositive than the decomposition of acetamide and more electronegative than the one-electron charge exchange: Ti(IV)/Ti(III) has been observed. This process corresponds to the electrochemical synthesis of Ti-B compound. Ultra thin coatings of titanium boride have been obtained on nickel by the electrolysis from a CH3CONH2–(NH4)2TiF6–NH4BF4 melt at 120°C at current densities of 10-20 mA/cm2.