How Charged Water Drops Induce Corrosion

A study published in Nature by Zhongyuan Ni and colleagues found that water droplets sliding down insulating surfaces can accumulate over 1 kV of electric potential. When these charged droplets hit a metal surface coated with a protective layer (Teflon in the experiment), they can cause dielectric breakdown of the coating, exposing bare metal underneath and inducing corrosion. The charged droplet acts as one electrode while the grounded metal surface acts as the other, and this phenomenon isn't limited to lab conditions—it can occur naturally in clouds, waves, and various industrial processes, making it a difficult problem to shield against.

Source: https://hackaday.com/2026/09/06/how-charged-water-drops-induce-corrosion. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.