The air oxidation of two Cu-Ni-Ag alloys at 600-700 degrees C
文献类型：期刊论文
| 作者 | Y. Niu ; Z. L. Zhao ; F. Gesmundo ; M. Al-Omary |
| 刊名 | Corrosion Science
 |
| 出版日期 | 2001 |
| 卷号 | 43期号:8页码:1541-1556 |
| 关键词 | copper-nickel-silver alloys oxidation high temperatures low-oxygen pressures high-temperature oxidation possible scaling modes high oxidant pressures 2-phase binary-alloys h-2-h2s mixtures cr alloys nb alloys 600-800-degrees-c sulfidation |
| ISSN号 | 0010-938X |
| 中文摘要 | The oxidation of two Cu-Ni-Ag alloys in air has been studied at 600-700 degreesC, Both alloys contain a mixture of a silver-rich phase (alpha) with a second phase mostly composed of a copper-nickel solid solution (beta). Thus, these alloys are ternary two-phase systems containing two reactive metals with different affinity for oxygen plus a noble metal. Under all conditions the two alloys form complex scales containing an outermost layer of copper oxides followed by an inner region composed of a mixture of Cu2O plus NiO With a number of silver metal particles. 4 region of internal oxidation of nickel of the classical type is only observed for Cu-15Ni-15Ag oxidized at 700 degreesC. For Cu-25Ni-25Ag, the particles of the beta phase in the innermost scale region are corroded only around their surface, leaving an unoxidized core surrounded by NiO. A peculiar structure observed for Cu-15SNi-15Ag at 700 degreesC is the presence of CuO beneath a Cu2O layer, which is attributed to a decrease of the oxygen pressure for the Cu2O-CuO equilibrium due to preferential dissolution of NiO in CuO rather than in Cu2O. The oxidation rate of each alloy under constant temperature decreases generally with time and is only approximately parabolic, showing some short periods of accelerated oxidation. For each alloy the rate increases with temperature, while at both temperatures Cu-15Ni-15Ag corrodes more rapidly than Cu-25Ni-25Ag. The scaling rates of the two alloys are substantially similar to those for the oxidation of pure copper, in spite of the presence of silver metal and of NiO in the scales. (C) 2001 Elsevier Science Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/36764]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Y. Niu,Z. L. Zhao,F. Gesmundo,et al. The air oxidation of two Cu-Ni-Ag alloys at 600-700 degrees C[J]. Corrosion Science,2001,43(8):1541-1556. |
| APA | Y. Niu,Z. L. Zhao,F. Gesmundo,&M. Al-Omary.(2001).The air oxidation of two Cu-Ni-Ag alloys at 600-700 degrees C.Corrosion Science,43(8),1541-1556. |
| MLA | Y. Niu,et al."The air oxidation of two Cu-Ni-Ag alloys at 600-700 degrees C".Corrosion Science 43.8(2001):1541-1556. |
入库方式： OAI收割
来源：金属研究所
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