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Twin Wire Arc Spray (TWAS) System | Cost-Effective Thermal Spray Coating
In this spraying technique, two wires from the coating material are melted using a short circuit arc (electric spark) of direct current electricity at the nozzle of the spraying gun. After that, the formed tiny material droplets are atomized and sprayed onto the substrate with compressed air.
Electric arc spraying and gas-flame spraying techniques both come under wire arc spray processes. It is also known as the TWAS System or can also be simply called as Arc Spray Method. All types of metal and alloys in the form of wire are used in arc spraying material. This wire arc coating provides moderately thick coatings to restore heavily damaged equipment. They can simply be used to provide increased wear resistance than the original component substrate.
Advantages:
- Cost Effective & Fast Service
- Low operation cost
- High efficiency of productivity
- Low heat input to the substrate and variant materials available for spraying
- Resistant to many corrosive environments
- Galvanically active and sacrificial coatings
- Resistance to wear, erosion and cavitation
- High temperature, oxidation resistance
- Prevention of biofouling materials
- Dimensional restoration
- Controlled surface profiles or textured surfaces
- Gripping and anti-skid surfaces
