| Compare | ||
| Performance | Powder expory | Liquid epoxy |
| Raw material | Solvent-free, food grade powder, green | Diluent, curing agent, irritating odor |
| Process | Hot melting spraying, make an action with the steel pipes in 250 degree forming a alloy layer with steel and plastic | Cold spray by spray gun, need time for curing |
| Adhesive force | Mechanical chimeric, chemical bonds, diffusion, electrostatic binding force | Mechanical chimeric |
| Thickness / each time | 300-500μm | 30-80μm |
| Friction coefficient | 0.0086 | 0.012 |
| Time for using in theory | 50 years | 3 - 5 years |