EMT IMC Rigid Conduit with UL listed should be Hot dip galvanized,all Pre-galvanized or Electro-galvanized Pipes can't pass UL testing pls note.
EMT IMC Pipe bending should be standard thickness
If the thinner type Pipe bending will be wrinkled or broken.
How to keep?
conduit fittings should be stored in dry conditions to prevent the
build up of white rust (wet storage stain). Should this occur, it can be
removed and is unlikely to affect the conduit fittings resistance