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| Prediction of Galvanic Corrosion of Aluminium Alloy-CFRP Lapped Structure in Aircraft |
| Received:March 21, 2015 Revised:April 15, 2015 |
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| DOI：10.7643/issn.1672-9242.2020.05.009 |
| KeyWord:aircraft aluminum alloy composite overlap structure galvanic corrosion |
| Author | Institution |
| BIAN Gui-xue |
Qingdao Campus of Naval Aviation University, Qingdao , China |
| ZHANG Hao-jun |
Qingdao Campus of Naval Aviation University, Qingdao , China |
| WANG An-dong |
Qingdao Campus of Naval Aviation University, Qingdao , China |
| CHEN Yue-liang |
Qingdao Campus of Naval Aviation University, Qingdao , China |
| ZHANG Yong |
Qingdao Campus of Naval Aviation University, Qingdao , China |
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| Abstract: |
| The paper aims to predict corrosion position and corrosion depth of aluminum alloy-CFRP lapped specimen by finite element simulation.The potentiodynamic polarization method was used to measure the polarization curves of aluminium alloy and composite materials in 5% NaCl solution at 40 ℃. Taking polarization curve and its fitting electrochemical kinetic parameters as boundary conditions, a simulation model of galvanic corrosion was established. The corrosion prediction results of the two materials were obtained by the model calculation, and the results were compared with the corrosion test results in the laboratory. The error of galvanic potential between the predicted and measured values was 4.2%. The corrosion site of the lapped specimen was within 3 mm of the coupling, and its corrosion distribution was basically consistent with the potential distribution law predicted by the electric couple corrosion model of the lapped specimen. The comparison error between the predicted corrosion depth and the measured value of the corrosion experiment was 12.5%. The experimental results are consistent with the simulation results, proving the correctness of the simulation model. |
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