Change in Electrochemical Impedance Spectrum of Al/CFRP Adhesive Lap Joint by High Temperature, High Humidity-Cold Cycle Test

抄録

Weight reduction in automobiles is an effective way to reduce carbon dioxide emissions. To reduce the weight, adhesive joints made from light materials are expected to be widely used. However, the deterioration evaluation of adhesion in joints exposed to corrosive environments, such as the salt-damaged area, is performed using destructive evaluation methods such as tensile tests.

In this study, to develop a non-destructive method for detecting the deterioration of aluminum/carbon fiber-reinforced plastic lap joints by adhesives, we investigated the change in the electric properties of the joints before and after corrosion tests through electrochemical impedance spectroscopy. It was observed that the impedance and frequency dependence of the dielectric loss tangent of the joints were changed by the corrosion test.

 

This Paper was Originally Published in Japanese in Zairyo-to-Kankyo 70 (2021) 365–369.