I had an idea for what happens after you abandon ship?
I thought this trough and have a solid solution!
When you are on your ship there would be something called ''vacuum decay'' wich is very slow and ''atmospheric decay'' wich is a little bit faster. Wich means your ship is on maintenance, for example:
ION Thruster emits radiation-Creates a type of rust--- Scrubs rust away---------All clear!
Does Not do anything--- Has to do full repair!
Control Panel has short circuit --- Repairs it ------- We are good!
Does nothing--- The panel has a 0.3 chance of corrupting other parts.
Now that we have a sense of how it COULD work, lets get to WHEN it happens!
On board there is no decay exept for maintenance that is. once off-board a timer sets for 2 real life days until one of the decaying starts to happen.