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Power |
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NanoSteel Thermal Spray Coating on Boiler Tubes |
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Provides Superior Erosion & Corrosion Resistance |
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Problem: Erosion and Corrosion
Waste coal is a low energy value discard that has accumulated for more than a century at anthracite and bituminous coal mines in the Northeast USA. Since the early 1990s, coal fired power plants near these mines have been configured to burn this inexpensive fuel source in circulating fluidized bed (CFB) combustion boilers.
For every 100 tons of waste coal burned, more than 60 tons of fly ash, containing chemicals such as mercury and sulfur, is produced along with emissions containing very fine nitrogen oxide particles. Plant operators feed limestone into the combustor to control the chemicals and introduce ammonia to reduce nitrogen oxide emissions. The result is erosion and corrosion damage that causes boiler tube failures and costly unscheduled outages.
Solution: NanoSteel Thermal Spray Coating
Inside a CFB boiler at a coal fired power plant in Pennsylvania, a thermal spray coating field trial comparison was conducted on a section of boiler tubes where the most severe erosion damage occurs. NanoSteel SHS 7170 TWAS was applied to a 7’ x 5’ section of boiler tubes between two LMC Armacor™ thermal spray coatings of equal size. |
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Result: NanoSteel Coating Outperforms LMC Armacor™ Coatings
When the boiler tubes were inspected during a scheduled outage after 9 months of service, the NanoSteel SHS 7170 TWAS coating did not show any signs of erosion or corrosion damage while both LMC Armacor™ coatings showed erosion damage requiring repair. |
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Additional Information
For project cost analysis, contact NanoSteel toll free at 1-877-293-6266 in the United States and Canada or 001 401 270 3549 internationally, or e-mail quote@NanoSteelco.com. |
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