Abstract
The coatings on aluminum beverage can lid interiors can be prone to long-term degradation due to the high impact forces during fabrication and the corrosive nature of beverages. Multi-month tests are required to assess their resistance to this degradation. This study aims to present an innovative can lid coating testing method that incorporates in-situ Electrochemical Impedance Spectroscopy (EIS) monitoring under real-world conditions and with actual beverages. A robust testing chamber was meticulously engineered to house the 3D-shaped lid and maintain the conditions found in a beverage can. Experiments were conducted at stressed and non-stressed conditions, assessing different coatings and different beverages. The developed method has the potential to mimic the multi-month pack tests and offers a quicker, more insightful, and less laborious alternative for the lid coating degradation assessment. Ultimately, this method could help in improving the longevity and quality of aluminum beverage cans.
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