A paint additive will protect cars, bridges, and ships from corrosion.

When a car's underbody or a ship's hull begins to corrode, it usually ends up junked. New protective coatings developed at the University of Illinois heal over their own scratches with no external intervention, protecting the underlying metal. The self-healing elements, enclosed in microcapsules that rip open when the coating is scratched, are compatible with a wide range of paints and protective coatings. The coatings, being marketed by Autonomic Materials of Champaign, IL, may be on the market in as soon as four months.