AC IMPEDANCE OF Ni-AI INTERMETALLIC COMPOUNDS AFTER HOT CORROSION

Chinese Journal of Applied Chemistry ›› 1993, Vol. 0 ›› Issue (5): 110-112.

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AC IMPEDANCE OF Ni-AI INTERMETALLIC COMPOUNDS AFTER HOT CORROSION

Zeng Chaoliu, Zhang Jianqing, Niu Yan, Wu Weitao

Corrosion Science Laboratory, Institute of Corrosion and Protection of Metals, Chinese Academy of Sciences, 110015 Shenyang

Received:1992-10-20 Revised:1993-05-04 Published:1993-10-10 Online:1993-10-10

Abstract

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.

Key words: Ni-Al intermetallic compound, molten salt, hot corrosion, AC impedance

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, 0(5): 110-112.

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AC IMPEDANCE OF Ni-AI INTERMETALLIC COMPOUNDS AFTER HOT CORROSION

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