BRIEF OF THERMAL ARC SPRAY PROCESS

     In this process, the raw material in the form of a pair of metallic wires is melted by an electric arc.      This molten material is atomized by compressed air & propelled towards the workpiece. The molten      spray solidifies on the component surface to form a dense & strongly adherent coating.
     

     The Right Coating For The Job

• There are 50 different wires designed specifically for arc spraying. Wires include copper, zinc, aluminium, bronze, steel, nickel, stainless steel, haste alloy, inconel & a variety of cored wires. These proven materials are used in applications including.
• Wear Resistance, Electrical Conductivity, Corrosion Protection, Parts.

• Restoration, Bonding & Mold/Tool making.
     

  ADVANTAGES

  • No Thermal Stress.
  • Cost Effective.
  • Improved Surface Properties.
  • Quicker Process.
  • No Blow Holes & Porosity less than 2-3%.
  • Machining/Grinding can be done.
  • Temp. of the substrate does not exceed 80-120 deg C.
  • Rework easily done.

  APPLICATIONS   

  1. M.G Cylinders, Pick-up rolls,Rewinders, Dryers and other rolls from paper/textile mills.
  2. Shafts-bearing and seal area
  3. Pumps-special coating  on sleeves, wear plates, volute casings
  4. Structure-to protect it from atmospheric corrosion and hazardous gases
  5. Tank and Agitators-special coatings for protections.
  6. Boiler- bed coils. Economizer coils, L.S.H.S tubes, nozzles area, headers soot blower area etc.
  7. I.D. fans-to check acute abrasion.
  8. White metal and copper/bronze bearings
  9. Gear box-shaft bearing area and seal area
  10. Chimney/muffler of D.G set coating with aluminium to protect it from high temperature corrosion.
  11. Crank shaft-reclaim its pin area.

  HIGH VELOCITY OXYGEN FUEL COATING

In the HVOF process, flammable gases, oxygen & feed stock are simultaneously fed into a specially designed chamber. A spark plug ignites the mixture & propels the semi-molted material onto the substrate. The ‘high velocity’ factor is the key to quality coatings produced by this method.

1.HVOF reduces oxides in the coating due to the speed at which particles travel through the air.

2. The supersonic velocities and high temperature of HVOF produce superior coating densities & give the substrate its best possible protection from abrasion, erosion, wear resistance & corrosion.

    COATING SPECIFICATION

    COATING BENEFITS