引用本文:
曾潮流, 张鉴清, 牛焱, 吴维㞵. Ni-Al系金属间化合物熔盐热腐蚀后的交流阻抗研究[J]. 应用化学,
1993, 10(5): 110-112.
Citation: Zeng Chaoliu, Zhang Jianqing, Niu Yan, Wu Weitao. AC IMPEDANCE OF Ni-AI INTERMETALLIC COMPOUNDS AFTER HOT CORROSION[J]. Chinese Journal of Applied Chemistry, 1993, 10(5): 110-112.
Citation: Zeng Chaoliu, Zhang Jianqing, Niu Yan, Wu Weitao. AC IMPEDANCE OF Ni-AI INTERMETALLIC COMPOUNDS AFTER HOT CORROSION[J]. Chinese Journal of Applied Chemistry, 1993, 10(5): 110-112.
Ni-Al系金属间化合物熔盐热腐蚀后的交流阻抗研究
摘要:
近年来,Ni-Al基金属间化合物的研究特别活跃,是一类潜在高温结构材料。作者曾研究了铁基合金熔盐腐蚀的阻抗特征,提出了阻抗模型及图谱解析方法[1,2]。本文研究Ni-Al系金属间化合物熔盐热腐蚀的阻抗特征。材料为Ni3Al和NiAl(Fe)金属间化合物。X-衍射分析证明是此结构。Ni3Al成分为(at%):Al 21.2,B 0.1,Zr 0.3,Ni余量;NiAl(Fe)成分为(at%):Al 19.68,Fe 15.03,Mo 2.0,Hf 0.27,Ni余量。
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关键词:
- Ni-Al金属间化合物
- / 熔融盐
- / 热腐蚀
- / 交流阻抗
English
AC IMPEDANCE OF Ni-AI INTERMETALLIC COMPOUNDS AFTER HOT CORROSION
Abstract:
Hot corrosion of Ni-Al intermetallic compounds in molten (Na,K, Li)2SO4 has been studied by AC impedance technique. The hot corrosion of Ni-Al alloys was shown to be a diffusion-controlled process.The parameters in the corresponding equivalent circuit was calculated by the IFP technique. The results showed that the value of the charge-transfer resistance of Ni-Al alloys was very small,which indicates the lower anticorrosive character of the alloys. The mechanism of Ni-Al alloys during hot corrosion has been discussed.
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Key words:
- Ni-Al intermetallic compound
- / molten salt
- / hot corrosion
- / AC impedance
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