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To protect the structure from the corrosive effects of the salt air which could weaken and corrode its unprotected metal and steelwork.
maybe becuz they didnt have no gold so they use orange
weekly
The Golden Gate bridge was originally painted its current orange color as a sealant to protect against rust. It was kept the color because it stood out to oncoming ships. People ask, why not golden?...
Because the type of paint they use, rust color, is resistant to salt air.