No, anon this is NOT normal!
With this much rust, deck squids would be painting. (I did it while underway, hanging off the side of the ship [had to look pretty for the PI])
If the corrosion was too severe, it would need dry dock sand blasting.
Plus the primer & paint is special stuff designed to withstand the salt water.
This broke down from within (possibly from crap steel + shitty paint job).
Didn't the suspect steel Q referenced come from Japan under Obama?
Captain should be relieved of command for allowing a boat to come to this point.