Boiler surfacing
MECHANISM
ANTI-CORROSION METHOD
Boiler tube is selected according to steam temperature and pressure, protected material layer should ensure that the performance of tube matrix is not affected.
Technology type | Material | Characteristics |
CMT welding | Wire | High material utilization rate, no spatter, single layer welding, Low Fe content , High binding force, less deformation |
Gas shielded arc welding | Wire | High material utilization rate, more spatter, double layer welding, high Fe content of bottom layer, High binding force, large deformation |
Thermal spraying | Powder | Low material utilization rate, low Fe content , poor binding force |
Laser melt-coating | Powder | Low material utilization rate, low Fe content, poor binding force |
PROCESS SELECTED | MATERIAL SELECTED |
Metallurgical bonding High density of protective layer Less thermal effect Low Fe content rate | Excellent corrosion resistance at high temperature Abrasion resistance Strong plasticity performance Excellent weldability performance |