Celtic Coating Solutions
Thermal Spraying
Thermal spraying is a technology which improves or restores the surface of a solid material.
Thermal spray coating involves the use of a torch to heat a material, in powder or wire form, to a molten or near-molten state, and the use of a gas to propel the material to the target substrate, creating a completely new surface. The coating material may be a single element, alloy or compound with unique physical properties that are, in most cases, achievable only through the thermal spray process.
Thermal spray coatings are a highly cost-effective and straight-forward method for adding superior properties and performance qualities to a given engineering surface. The variety of products and coatings that can be enhanced by thermal spray are virtually limitless. The coatings are usually metallic, ceramic, carbides, or a combination of these materials to meet a range of physical criteria.
| Material | Hardness and Bond Strength | Typical Characteristics and Applications |
|---|---|---|
| Copper | 37 Rb 7324 PSI |
Electric conductivity; Copper reclamation; Used as alternate to copper plating |
| Molybdenum | 14-36 Rb 5496 PSI |
Abrasion resistance; Excellent adhesion to steel; Excellent in molten metal environment in inert atmospheres |
| Carbon Steel | 97-100 Rb 5700 PSI |
Dimensional restoration of mismachined and worn parts |
| Tungsten Carbide | 52 Rc 6700 PSI |
Excellent bond strength; Abrasion resistance; Dredge cutter blades |
| FUNCTION | APPLICATION | COATING |
|---|---|---|
| Wear Resistance | ||
| Adhesive Wear | Bearings, piston rings, hydraulic press sleeves | Chrome Oxide, Babbit, Carbon Steel |
| Abrasive Wear | Guide bars, pump seals, concrete mixer screws | Tungsten Carbide, Alumina/Titania, Steel |
| Surface Fatigue Wear |
Dead centers, cam followers, fan blades (jet engines), wear rings (land based turbines) | Tungsten Carbide, Copper/Nickel/Indium Alloy, Chrome Carbide |
| Erosion | Slurry pumps, exhaust fans, dust collectors | Tungsten Carbide, Stellite |
| Heat Resistance | Burner cans/baskets (gas turbines), exhaust ducts | Partially Stabilized Zirconia |
| Oxidation Resistance | Exhaust mufflers, heat treating fixtures, exhaust valve stems | Aluminum, Nickel/Chrome Alloy, Hastelloy |
| Corrosion Resistance | Pump parts, storage tanks, food handling equipment | Stainless Steel (316), Aluminum, Inconel, Hastelloy |
| Electrical Conductivity | Electrical contacts, ground connectors | Copper |
| Electrical Resistance | Insulation for heater tubes, soldering tips | Alumina |
| Restoration of Dim. | Printing rolls, undersize bearings | Carbon Steel, Stainless Steel |