| Electrochemical Impedance Study of Hot Corrosion of the Mo-Rich Ni3Al-Base Alloy IC6 at 750-800 degrees C Beneath Solid Na2SO4 Deposits | |
| Zeng, C. L.; Feng, Z. J.; Liu, Y. | |
| Corresponding Author | Zeng, C. L.(clzeng@imr.ac.cn) |
| 2011-08-01 | |
| Source Publication | OXIDATION OF METALS
 |
| ISSN | 0030-770X |
| Volume | 76Issue:1-2Pages:83-92 |
| Abstract | A two-electrode probe was used for electrochemical impedance studies of hot corrosion kinetics of molybdenum-containing Ni3Al-base alloy IC6 covered with a solid Na2SO4 film at 750 and 800 degrees C in air. The alloy was subject to catastrophic corrosion at both temperatures, forming a thick porous oxide layer, as a result of the formation of Na2MoO4-MoO3-Na2SO4 melt. The experimental temperature affected the formation of the melt, the ionic conduction of the corrosion layer, and thus the impedance characteristics. For the corrosion at 800 degrees C the Nyquist plots were composed of two capacitive loops at high-mid frequency and a line at low frequency indicating a diffusion-controlled reaction. At 750 degrees C, however, the plots consisted of a single capacitive loop in the initial stage, followed by the same impedance features as at 800 degrees C. Two equivalent circuits were proposed to fit the impedance spectra at the two temperatures. Based on the precise measurements of diffusion impedance, the diffusion flux of oxygen through the salt layer was calculated, and the main reduction reaction was also discussed. |
| Keyword | Intermetallic alloy IC6 Na2SO4 deposits Hot corrosion Electrochemical impedance spectroscopy |
| DOI | 10.1007/s11085-011-9247-5 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000294691800006 |
| Publisher | SPRINGER/PLENUM PUBLISHERS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/105537 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zeng, C. L. |
| Affiliation | Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Zeng, C. L.,Feng, Z. J.,Liu, Y.. Electrochemical Impedance Study of Hot Corrosion of the Mo-Rich Ni3Al-Base Alloy IC6 at 750-800 degrees C Beneath Solid Na2SO4 Deposits[J]. OXIDATION OF METALS,2011,76(1-2):83-92. |
| APA | Zeng, C. L.,Feng, Z. J.,&Liu, Y..(2011).Electrochemical Impedance Study of Hot Corrosion of the Mo-Rich Ni3Al-Base Alloy IC6 at 750-800 degrees C Beneath Solid Na2SO4 Deposits.OXIDATION OF METALS,76(1-2),83-92. |
| MLA | Zeng, C. L.,et al."Electrochemical Impedance Study of Hot Corrosion of the Mo-Rich Ni3Al-Base Alloy IC6 at 750-800 degrees C Beneath Solid Na2SO4 Deposits".OXIDATION OF METALS 76.1-2(2011):83-92. |
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