Rust is typically only a visual flaw on the housings and screws. But it may also arise on the connectors of the . Components making electrical connections such as plug connectors, relay contacts and soldered joints are particularly critical. Rust formation in these areas, often causes a loss of function or even total failure.
The removal of rust is usually very time-consuming and needs special equipment. There are even companies that specialize entirely in cleaning industrial electronics. So the best thing you can do is to prevent rust on your power supply before it occurs.