Dear Egpet users

Has someone experienced on the thermal spraying on existing equipment at a refinery.
I have a case with a distillation column (about 45meter height and 5 meter dia).

The current condition of this column is highly corroded. we are intending to do this spray technology on the top dome and some part of cylinder area.
Kindly share your experiences or any technical inputs for this type of situation.

thanks in advance....