Corrosion and environmental sensor response delays during monitored multi-droplet wetting
Unraveling time lags in atmospheric corrosion
Vincent Vangrunderbeek (Vrije Universiteit Brussel)
Keer Zhang (TU Delft - Mechanical Engineering)
Leonardo Bertolucci Coelho (IAlto Ltda, Vrije Universiteit Brussel)
Fritz Friedersdorf (Luna Labs USA)
Rebecca Marshall (Luna Labs USA)
Yaiza Gonzalez-Garcia (TU Delft - Mechanical Engineering)
Mats Meeusen (Vrije Universiteit Brussel)
Annick Hubin (Vrije Universiteit Brussel)
Herman Terryn (Vrije Universiteit Brussel)
Mesfin Haile Mamme (Vrije Universiteit Brussel)
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Abstract
This study investigates time lags between environmental changes, electrolyte formation, and atmospheric corrosion sensor responses under controlled multi-droplet wetting. A commercial corrosion and environmental sensor was combined with in-situ microscopy, and an Artificial Intelligence (AI)-based segmentation approach was applied to track droplet growth. A cross-correlation analysis identified and quantified time lags between Surface Relative Humidity (SRH), droplet radius, and sensor responses based on Interdigitated Electrodes (IDE) measuring conductance, galvanic corrosion, and free corrosion. This approach ultimately aids in understanding how environmental fluctuations affect the dynamic behaviour of the electrolyte layer and, in turn, influence atmospheric corrosion sensor responses.