One of the most common problems with washing machines is because of damage of drum bearings. Then there will be a huge rumbling noise. If the rust has built-up in the bottom of the machine, then it is a symptom of worn bearings.
If you are able to move the drum, then it is a sign of damaged drum bearings. The next step is to call an experienced washing machine repair technician.
However please remember that it is not safe to repair electrical appliances without having adequate professional knowledge, training and experience.
Please use skilled and professional engineers for all your washing machine repairs.