You could argue that any time an aircraft is given a route which is not on a permanent air corridor, a temporary one is set up, and that if a controller gives several planes a similar route, that corridor is in use
More sensibly, no - there's no need to, there's plenty of airspace in areas with no corridors, and even if there was an unusual amount of traffic the controller would just implement a similar concept (routing aircraft along a similar route in the same direction) on an ad-hoc basis as and when required - there's no need to declare it as a corridor in some official manner and propagate that information to airlines and pilots.
Corridors are only necessary for busy routes, and even then it's not mandatory for them to be used by ATC - it's just sensible to use them most of the time to avoid confusion