Raindrops are tiny lightning bolts, and they’re corroding cars, study finds

A study published in September 2026 revealed that raindrops generate miniature electrical discharges upon impact, functioning as tiny lightning bolts. This phenomenon, which occurs when raindrops strike surfaces, initiates chemical reactions that contribute to the corrosion of automobile exteriors. The research, detailed in the scientific paper "Electrification of Raindrops and Their Impact on Material Degradation," suggests that the cumulative effect of these microscopic electrical events plays a previously unrecognized role in material wear and tear. This finding has significant implications for automotive materials science, potentially leading to the development of new protective coatings and manufacturing processes designed to mitigate this newly identified form of environmental degradation on vehicles.