局部拉弯应力对民机蒙皮2024-T3铝合金剥蚀行为的影响

doi:CNKI:11-1929/V.20120201.0941.003

Abstract

Abstract: By means of a simple loading device designed for the bending beam test combined with the electrochemical impedance spectroscopy (EIS) testing method, this paper studies the effect of local tensile and bending stress on the exfoliation corrosion (EXCO) behavior of aluminum alloy 2024-T3 for civil aircraft skin immersed in the EXCO solution. The result shows that in the EIS two time constants appeare when the alloy exfoliation corrosion occurres. The EIS of the aluminum alloy 2024-T3 load specimen demonstrate two time constants when immersed in the EXCO solution for 12 h, while the specimen without load demonstrate two time constants between 12 h and 24 h. The comparison of the EIS fitting data of two different specimens during alloy exfoliation corrosion shows that local tensile and bending stress can promote the exfoliation corrosion behavior of aluminum alloy 2024-T3.

Key words: aluminum alloy 2024-T3, bending beam test, electrochemical impedance spectroscopy (EIS), EXCO solution, exfoliation corrosion

CLC Number:

JI Zhaohui, ZHANG Zhang, SU Jingxin, WANG Zhiping. Impact of Local Tensile and Bending Stress on Exfoliation Corrosion Behavior of Aluminum Alloy 2024-T3 for Civil Aircraft Skin[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, (5): 956-964.

References

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Impact of Local Tensile and Bending Stress on Exfoliation Corrosion Behavior of Aluminum Alloy 2024-T3 for Civil Aircraft Skin

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