Robotic welding nozzles clog when anti-spatter evaporates or runs off between cycles and the nozzle runs hot for long periods. A dry, heat-resistant film lasts longer under those conditions. Micron 2121 Ceramic Boron Nitride Powder Anti Spatter leaves a dry ceramic layer that its page says does not evaporate or run, lists welding robots and automated welding lines, and states heat resistance up to 1200°C. For a dip or spray station, the bulk water-based Micron 2118 is the liquid option.
Why it happens
Robots weld for long stretches with short breaks, which is hard on the torch:
- Anti-spatter evaporating or running off between cycles. Liquid films do not stay put on a hot nozzle for long.
- High duty-cycle heat on the nozzle. Continuous welding keeps the nozzle hot, so spatter bonds faster.
The result is frequent robot stoppages for torch cleaning, nozzle bridging, and loss of gas coverage, which shows up as porosity.
How to fix it
- Robot or continuous welding needing a long-lasting dry film: Micron 2121 Ceramic Boron Nitride Powder Anti Spatter. Its page describes a dry, heat-resistant powder film that acts as a physical barrier, lists welding torches, nozzles and contact tips, and lists welding robots and automated welding lines.
- You need bulk liquid for a dip or spray station: Micron 2118 Water based Anti Spatter, 5 L. Its page says it is suited to robotic or semi-automatic welding systems and can be applied by spray, brush or dip.
The 2121 page does not give step-by-step directions. Follow the instructions on the can and the TDS. Fit the application into your torch-cleaning routine: clean the nozzle, then coat it while the robot is stopped and the torch is cool. For 2118, follow its page and TDS for your spray or dip setup.
Check how the coating works with your reamer or torch-cleaning station. If spatter still builds up after reaming, look at the station settings and the welding parameters as well as the anti-spatter.
What to avoid
- Do not exceed the stated 1200°C radiant heat rating for 2121.
- Spray nozzles when the robot is stopped and the torch is cool, and follow the can label. 2121 is a pressurised aerosol. Its page describes it as non-flammable, but the propellant is not stated, so do not rely on that claim until the SDS confirms it.
- Do not dilute 2118 without Micron guidance. No dilution ratio is published.
- Do not spray into the wire feed or gas diffuser.
When to ask an expert
Ask your robot integrator if:
- clogging persists after switching anti-spatter;
- the reamer or torch-cleaning station is not clearing the nozzle;
- nozzle design or contact tip recess may be the problem.
Ask Micron technical if you need guidance on spray-system setup for 2118.
FAQ
Why does a dry ceramic film last longer on a robot torch?
Micron's 2121 page says the ceramic coating does not evaporate or run once applied, which suits continuous welding. Liquid anti-spatter tends to flash off on a hot nozzle.
Can I use 2121 on jigs and fixtures as well?
Yes. Its page lists fixtures, jigs, welding beds and workpieces alongside torches and nozzles.
Is 2118 suitable for an automatic dip station?
The 2118 page says it can be applied by spray, brush or dip and suits robotic or semi-automatic welding. Ask Micron about your station before setting it up.
Will the anti-spatter affect painting the parts later?
The 2121 page says it is silicone-free and ensures paint compatibility. The 2118 page says it is silicone-free and paint-ready. Test a part through your paint line if your finish is critical.
See the product: Micron 2121 Ceramic Boron Nitride Powder Anti Spatter. Related: 2118 Water based Anti Spatter. More welding fixes: welding hub.