航空铝合金涂层体系加速老化试验前后电化学阻抗变化

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2008, Vol. 29 ›› Issue (3): 746-751.

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Electrochemical Impedance Varieties of Zinc Yellow Polypropylene Coated Aluminum  Alloy Used in Aircraft During the Accelerated Degradation Test

Sun Zhihua¹, Zhang Ni², Cai Jianping¹, Liu Ming¹, Lu Feng¹

1Lab of Metal Corrosion and Protection, Beijing Institute of Aeronautics Materials 2School of Materials Science and Engineering, Beijing University of Aeronautics and  Astronautics

Received:2007-08-27 Revised:2007-12-10 Online:2008-05-20 Published:2008-05-20
Contact: Sun Zhihua¹

Abstract

Abstract:

The electrochemical impedance varieties of zinc yellow polypropylene coated aluminum alloy 7B04 used in aircraft during accelerated degradation test are studied using electrochemical impedance spectroscopy(EIS), and the characteristics of its corrosive failure are also investigated. It has been found that the zinc yellow polypropylene coating has little flaws and acts as a pure capacitance before the degradation test. But water can quickly permeate into the coating after exposure to the test.

Key words: aluminum, , organic , coating, , accelerated , degradation , test, , EIS, , failure , characteristic

CLC Number:

Sun Zhihua;Zhang Ni;Cai Jianping;Liu Ming;Lu Feng. Electrochemical Impedance Varieties of Zinc Yellow Polypropylene Coated Aluminum  Alloy Used in Aircraft During the Accelerated Degradation Test[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2008, 29(3): 746-751.

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Electrochemical Impedance Varieties of Zinc Yellow Polypropylene Coated Aluminum  Alloy Used in Aircraft During the Accelerated Degradation Test

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