| Name | Designation |
| Bare AISI 1018 Carbon steel | CS (2) |
| Electroless Nickel on 1018 Carbon steel | EN on CS (2) |
| Flame Thermal Spray on 1018 Carbon Steel | FTS on CS (2) |
| Flame Thermal Spray plus Electroless Nickel on 1018 Carbon Steel | FTS + EN on CS (2) |
| Electroless Nickel plus Flame Thermal Spray on 1018 Carbon Steel | EN + FTS on CS (2) |