Out of Our Elements

Why Does Metal Rust? (And Why Should We Care?) (1x7)

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Caitlin Saks and Arlo Pérez Esquivel team up with fellow NOVA producer Alex Clark to investigate a chemistry problem that has been eating at Alex (or rather, at his classic S13 Nissan Silvia) — rust. But rust isn’t only a challenge for protecting Alex’s sweet ride. It’s also a chemistry problem that engineers must tackle in order to protect the United States’ aging infrastructure.