Steel that is exposed to water and salt rusts quikcly if you were a shipbuilder how would you protect your ship? explain why your idea works
To "rust" steel and it's component iron need moisture and oxygen. Rust is an oxidation. Prevent the moisture and/or the oxygen from contacting the steel, it will not rust. That is why ships, bridges, towers and other steel or iron structures or furniture are painted, or coated with some sort of material to prevent the oxidation.
coat it with something...like paint. this idea works because if the steel is coated with something, then the water and salt can't touch it, and so it won't rust. is this a homework question or something? sounds like some common sense is needed here.