Anti-Corrosion Surfacing For Waste Incineration Boiler Heating Surface
Professional high speed laser cladding technology for boiler membrane wall, superheater and economizer tubes, solve high temperature chlorine & sulfur corrosion and fly ash abrasion problems.
With the rapid expansion of municipal waste incineration power plants and renovation of old incinerators, boiler heating surfaces suffer severe high-temperature corrosion and abrasion due to massive chlorine and sulfur elements contained in garbage flue gas. Higher boiler temperature & pressure parameters will further accelerate tube corrosion and shorten service life.
CMT hardfacing is widely adopted as mainstream solution currently, but it has obvious drawbacks of high raw material cost and low processing efficiency. Our factory introduces advanced high speed laser cladding, a brand-new metal surface modification technology.
The technology adopts high energy density laser beam to melt base metal together with cladding powder synchronously, forming metallurgically bonded overlay on boiler tube substrate. By adjusting different cladding alloy materials, we can solve both high-temperature corrosion and heavy abrasion problems of incinerator heating surfaces, greatly extend the service cycle of boiler components.
| Item | Thermal Spray | Hardfacing & Spray Welding | Electroplating | High Speed Laser Cladding |
|---|---|---|---|---|
| Coating Bonding Force | Mechanical adhesion | Metallurgical bonding | Physical thin film adhesion | Metallurgical bonding |
| Abrasion Resistance | Medium | Good | Poor | Excellent | Porosity & Shrinkage Cavity | Many pores | Few defects | Few defects | Few defects |
| Heat Affect Zone & Deformation | Small | Large | Small | Small |
| Substrate Hardening Risk | No hardening | Hardened zone exists | No hardening | No hardening |
| Dilution Rate | No dilution | High dilution | No dilution | Ultra-low dilution |
| Processing Efficiency | High | Medium | High | Medium-High |
| Damaged Part Repair Capacity | Limited repair effect | Repairable but easy thermal damage | Not fit heavy damage | Ideal for severely corroded & worn parts repair |
| Process Maturity & Application Range | Mature, widely used | Relatively mature | Mature, multi-layer steps required | Fully mature, wide application |
| Economic Performance | Low cost | Medium cost | Good economy | Medium overall cost |
| Environmental Protection | General | Excellent | General | Excellent |
Conclusion: High speed laser cladding achieves superior coating quality and higher production efficiency for waste incinerator heating surface tubes compared with all other conventional surface treatment technologies.
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