Fixing Porosity After Changing Welding Gas
Porosity after changing gas types is caused by incomplete purging of old gas, contamination mixing, or parameters not adjusted for the new gas characteristics. Complete system purging and parameter re-optimization are essential.
Immediate Solution Steps
- Purge system completely. Run new gas at high flow for 2-3 minutes to flush all old gas from lines and torch.
- Check for gas mixing. Ensure regulator and lines are completely evacuated of previous gas type.
- Re-optimize parameters. Different gases require different voltage, wire feed, and travel speed settings.
- Test weld quality. Run test coupons before returning to production welding.
Common Gas Change Mistakes
- Don't assume parameters transfer. Each gas mix requires specific parameter optimization.
- Don't skip purging. Old gas contamination causes immediate quality issues.
- Don't ignore flow rate changes. Different gases may require different flow rates for proper coverage.
Solution
CORGON® Series
Consistent PerformanceWhy standardizing on CORGON helps: Using consistent Linde gas formulations reduces parameter variation when switching between applications, minimizing setup time and quality issues.