Case Study · Power Generation
Burner Tip High Emissivity Coating: 7× Longer Life in a Black Liquor Recovery Boiler
| Industry | Power Generation |
|---|---|
| Asset | Black liquor burner tips (stainless steel) |
| Customer or location | Recovery boiler |
| Products used | Emisshield sintered coating |
| Headline metric | First degradation 3 weeks to 9 months |
| Secondary metric | Time to failure 7 weeks to 12 months |
| Also measured | 7× life |
Black liquor burners in a recovery boiler were corroding so fast that tips lasted less than two months, and replacing them meant significant plant downtime. Emisshield sintered coatings were applied to the stainless-steel burner tips. Time to first degradation rose from 3 weeks to 9 months and time to failure from 7 weeks to 12 months, a sevenfold increase, with maintenance and downtime cost cut significantly.
01
What was the challenge?
Rapid corrosion of burner tips and the difficulty of replacing them in service.
02
What was applied?
Sintered coating applied to the burner tips to minimize or eliminate degradation from temperature and corrosion.
03
What were the results?
| Metric | Uncoated | Coated |
|---|---|---|
| Time to first degradation | 3 weeks | 9 months |
| Time to failure | 7 weeks | 12 months |
| Lifespan | Baseline | 7× |
| Maintenance and downtime cost | Baseline | Significantly reduced |
04
Why did it work?
The sintered ceramic surface separates the alloy from the corrosive black-liquor environment while its emissivity keeps the tip cooler and more uniform. See Products, sintered systems.
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