An article from Defence Media:

Have you ever wondered what 215 consecutive days at sea does to a ship?

When the destroyer USS Stout returned from its unprecedented 215-day deployment in October 2020, there was no way to hide how much of the ship was covered in rust.

One reason why Navy ships look so beat up is they are made of alloys that are designed to rust on the surface while protecting the metal underneath from further corrosion, said retired Navy Cmdr. Bryan Clark, a senior fellow with the Hudson Institute think tank in Washington, D.C.

The destroyer left Virginia's Naval Station Norfolk in mid-January and finally ended its gruelling nine-month deployment when it returned home on October 11, 2020. Along the way, the USS Stout traveled more than 60,000 nautical miles, completing multiple strait and choke point transits as it crossed the Atlantic Ocean while operating in the US 2nd, 5th and 6th fleets

carrying out various missions including ensuring the free flow of commerce.