The purpose of machining roughening before spraying

       The mechanical roughening method is to use mechanical cutting, chisel, rolling, etc. to roughen the surface to be sprayed, and it is mostly used for shaft parts. For flat parts, slotting, flat cloth nails and other methods are also used. Machining roughing applies to steel and non-ferrous metal substrates that can be machined. When a thicker coating needs to be prepared or it needs to adapt to more severe load conditions, only sandblasting is often used for roughening, and the surface roughness cannot meet the requirements of improving the bonding strength of the coating. Sandblasting can get good results.



The main purpose of mechanical roughening is to limit the shrinkage stress of the coating to local places, reduce the stress accumulation of the coating, increase the bonding area between the coating and the substrate, so as to improve the bonding strength of the coating, and make the coating in the coating. Folding between layers increases the shear strength of the coating itself.