You are going to need a good wrench with a long handle and some thread loosener. You need to soak the threads in liquid wrench or a similar lubricant as much as possible. This is necessairy to free the pipe as apposed to just twisting it off. Remember to thoroughly flush the pipe afterword, as some will get inside and you don't want thread loosener in your water supply. You can also use a "cheater bar," a bar or pipe used to extend the wrench handle, to give you more turque. Be carefull with this as you can twist the pipe off, ruining both fittings you are trying to save. Good luck, and hopefully your vocabulary is up to the task.
you should not fix rusted pipes. they should be replaced
It is too soft for things that are threaded and have moving parts.
Hit it with a hammer
there should be two threaded holes visible on the rotor hat . You can thread bolt into the holes with a ratchet to push the rotor off the hub
In regards to pipes and tubing, NPT stands for national pipe thread. NPT is the American standard for threaded pipes and fittings regarding the tapered threads.
Because of heavy salt present in the water reacts with ferrous Iron Pipes get rusted very fast. PVC sustains it and has long life.
You can try soaking it in Vinegar.
Put in Hot water
A cutting torch is one answer.
go to your local auto parts store and purchase an Easy Out or Screw Extractor. There are atleast 2 different kinds. I like the threaded ones that drill themselves into the screw as you turn.
Small juice can with pipes on either end in some cases the ends will just be threaded nuts so they don't look like pipes.