Arc Spray coatings
Among the various thermal spray systems that we utilize at MBI is the Twin Wire Arc spray process. This process is known to be the work horse of our industry. It allows us to apply advanced coating materials inexpensively and at high efficiency rates, which translates into savings to our customers.
This process is known to produce coatings that have extremely high bond strength, low stress and high density. Parts remains relatively cool during build-up (averaging 200 degrees F) avoiding warping and deformation. Coatings have versatile properties in term of hardness, thickness and composition.
Below is a partial list of some typical materials that are available to apply:
| Coating group | Average Hardness | Bond strength | As-sprayed finish (Ra) | Applications areas | Examples |
|---|---|---|---|---|---|
| Chrome steel alloys | 62 Rc | 8000 psi | 300-500 | Heavy build up and wear resistance | Bearing journals, Crankshaft journals, general wear apps. |
| Nickel alloys | 20 Rc, variable | >13,000 psi | 200-350 Ra | Bond coat, Inconel, Monel and other Ni alloys work. | General repair coating, corrosion applications, etc. |
| Stainless alloys | 30-60 Rc | >10,000 psi | 140-180 Ra | Wear with corrosion | Pump components, chemical industry parts. |
| Carbide alloys | 70 Rc | >10,000 psi | 150-500 Ra | Hard-coatings with heavy build up | Mixer blades, Fan blades, Granulators, Feed rolls, etc. |
| Copper alloys, bronze, brass | Rb scale hardness | >9,000 psi | Average 250 Ra | Rebuild non-ferrous alloy surfaces. | Pump impellers, print rollers, bronze bearing areas, etc. |
| Aluminum and Zinc | Low Rb | 8000 psi | 200-400 | Corrosion protection | Exceed galvanizing specs. |
A Feed Roll is being Arc sprayed with a traction coating for a tough gripping non-slip application.
Typical Properties
- Very high bond strength.
- Versatile hardness, to machine or grind.
- Versatile build-up .003” to >.0.300”
- Versatile finishes, smooth to extra rough.
- High ductility with low stresses
- High density with low porosities.
Typical Applications
- Feed Rolls & non-slip surfaces
- General journal build-up & repair
- Specific alloy build up material
- Replace galvanizing
- Heavy build-up requirements
- Chrome plating replacement coatings
- And much more!
Call (803) 313-9292 or click here to contact MBI for more information.