Flame-Spray Industries, Inc.

PTWA
Plasma Transferred Wire Arc Coating Process
Internal Diameter Bore Coating Process

	The PTWA process consists of a cathode, an air cooled pilot nozzle and an electrically conductive wire which is the anode. A supersonic plasma jet is generated between the cathode and the wire, as the wire is continuously feeding thereby generating a stream of molten particles. The finely divided molten particles are accelerated to the substrate with the addition of the atomizing gas. The plasma gas can be air, a mixture of Argon and hydrogen, or Nitrogen. The atomizing can be any non-combustible gas. The torch head can be rotated about the wire generating a 360 degree coating.
Engine Bore Applications
PTWA coatings can be used to replace Cast Iron Sleeves in Aluminum engines, or PTWA coating can be directly applied to cast Iron Engine blocks Over 3 million miles of trouble free on-the-road engine performance Can be used for OEM, repair, or to increase existing cylinder displacement
Other Internal Diameter Parts 2.5"-14"
Repair corroded or worn parts Improve part life by applying a resistant coating Apply a coating to irregular surfaces Improve ID wear resistance Improve part life and/or reduce part cost
PTWA Bore Coating Process