| 摘要 |
PURPOSE:To make the surface treatment of the inside surface of a long-sized pipe having a small diameter in particular at a low cost and with high accuracy without being limited by materials by disposing a wire for explosive cladding into the pipe in the state of insulating the wire from the pipe and evacuating the inside of the pipe to a vacuum state. CONSTITUTION:Caps 2 are attached to both ends of a carbon steel pipe 1 for piping and the pipe 1 is sealed against the external air by O-rings 3 in the stage of cladding copper to the inside surface of the pipe in order to provide corrosion prevention to, for example, the tube of a heat exchanger for a chemical plant. The copper wire 4 for explosive cladding is then fixed to electrodes 5. The electrode parts are sealed by O-rings 6. A vacuum evacuation pipe 7 is attached to one of the caps 2 and the inside of the pipe 1 is evacuated to the vacuum through said pipe; thereafter, a high voltage is impressed between the pipe 1 and the wire 4 to instantaneously evaporate the copper wire 4, by which the copper is explosively sprayed onto the inside surface of the pipe. |
