Structures made from a combination of aluminum alloy (AA) and carbon fiber reinforced plastic (CFRP) are susceptible to galvanic corrosion of the AA in harsh atmospheric conditions, such as might exist for closure panels in automotive applications. It is important to understand the galvanic corrosion behavior of these materials under laboratory conditions as that might allow prediction of performance in real environments. This work tested specially designed AA6×××-CFRP coupons, including AA6111 and AA6022, connected to CFRP made from two different carbon fiber fabrics (twill and random) with the aim of understanding the corrosion behaviors in a laboratory cyclic exposure chamber and during on-road exposure. The extent of corrosion was assessed by galvanic current measurements, optical profilometry (OP), cross-sectional area analysis and microscopic analysis. Based on the results, it was determined that the corrosion susceptibilities and morphologies observed in CFRP/AA couples tested in environmental chamber for 12 weeks were in correspondence with those of the coupons subjected to on-road testing for 1 year in Columbus, OH.
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Research Article|
April 28 2022
Laboratory Accelerated Cyclic Corrosion Testing and On-Road Corrosion Testing of AA6××× Coupled to Carbon Fiber Reinforced Plastics
Priyanka Adapala;
P Adapala Materials Science and Engineering,
The Ohio State University
, Columbus, 43210-1132, United States
Correspondence: Priyanka Adapala, Email: adapala.3@osu.edu
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Niamh Hosking;
Niamh Hosking
N Hosking
Ford Motor Company
, Dearborn, United States
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Mark Nichols;
Mark Nichols
M Nichols
Ford Motor Company
, Dearborn, United States
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Gerald Frankel
Gerald Frankel
G Frankel Fontana Corrosion Center,
The Ohio State Univ.
, Columbus, 43210, United States
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CORROSION 4079:.
Article history
Received:
March 03 2022
Revision Received:
April 26 2022
Accepted:
April 28 2022
Citation
Priyanka Adapala, Niamh Hosking, Mark Nichols, Gerald Frankel; Laboratory Accelerated Cyclic Corrosion Testing and On-Road Corrosion Testing of AA6××× Coupled to Carbon Fiber Reinforced Plastics. CORROSION 2022; 4079:. doi: https://doi.org/10.5006/4079
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