What are the effects of prolonged exposure to sunscreen sprays on metal surfaces?

Prolonged exposure to sunscreen sprays on metal surfaces can lead to significant damage due to chemical reactions. Many sunscreen formulations contain ingredients like zinc oxide, titanium dioxide, or organic compounds that may react with metals, accelerating corrosion. Over time, this can cause discoloration, pitting, or even structural weakening, particularly in aluminum, steel, or copper surfaces.

The effects vary depending on the sunscreen's chemical composition and the type of metal. For instance, saltwater-resistant sunscreens may introduce chloride ions, worsening rust formation. To mitigate damage, regular cleaning and applying protective coatings are recommended. Understanding these interactions helps in preserving metal objects exposed to sunscreen sprays, such as jewelry, outdoor fixtures, or sports equipment.