| Al_2O_3涂层对高温合金K38G热腐蚀的影响 |
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| 引用本文： | 王福会,朱圣龙,楼翰一,吴维(山文). Al_2O_3涂层对高温合金K38G热腐蚀的影响[J]. 腐蚀科学与防护技术, 1993, 5(1): 32-37 |
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| 作者姓名： | 王福会 朱圣龙 楼翰一 吴维(山文) |
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| 作者单位： | 中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室，中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室，中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室，中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室 沈阳 110015，沈阳 110015，沈阳 110015，沈阳 110015 |
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| 摘 要： | 用直流反应溅射方法在镍基高温合金K38G上制备了Al_2O_3涂层,研究了涂覆(Na、K)_2SO_4的试样在1123K空气中的热腐蚀行为。实验表明,Al_2O_3涂层具有良好的粘附性,能降低K38G合金的腐蚀速率并减小腐蚀深度。本文还讨论了Al_2O_3涂层对K38G热腐蚀影响的机制。
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| 关 键 词： | Al_2O_3涂层 热腐蚀 高温合金 |
| 收稿时间： | 1993-01-25 |
| 修稿时间： | 1993-01-25 |
EFFECT OF Al_2O_3 COATING ON HOT CORROSION OF SUPERALLOY K38G |
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| WANG Fuhui,ZHU Shenglong,LOU Hanyi,WU Weitao. EFFECT OF Al_2O_3 COATING ON HOT CORROSION OF SUPERALLOY K38G[J]. Corrosion Science and Protection Technology, 1993, 5(1): 32-37 |
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| Authors: | WANG Fuhui ZHU Shenglong LOU Hanyi WU Weitao |
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| Abstract: | Hot corrosion behavior of Ni-base superalloy K38G with Al_2O_3 coating was investigated in air at 1123K by applying (Na,K)_2SO_4 salt deposit. The Al_2O_3 coating was prepared by means of DC reactive sputtering, which improved the corrossion resistance of superalloy K38G. Both the basic fluxing and the oxidation-sulfidation occurred during the incubation period of the uncoated specimensm whereas they were alleviated by the application of the Al_2O_3 coating. For example, the depth of internal salfidation layer was minimized 3 times. It was also observed that the Al_2O_3 coating was scarcely thinned during corrosion. Some (Al,Cr)_2O_3 pillars and the TiO_2 needles were found at the coating / salt interface for the coated specimen. The mechanisms of the influence of the Al_2O_3 coating on hot corrosion of K38G alloy was discussed. |
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| Keywords: | Al_2O_3 coating hot corrosion superalloy |
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