Definition - What does Brushing mean?
This is a treatment done on the surface of a material as a preparation process before surface finishing protection processes are done. It consists of roughening the surface of the materials. It is used for:
- Removal of paint, coating or any form of corrosion
- Preparation for welding
- Roughening and deburring
- Polishing by removal of deposits
Corrosionpedia explains Brushing
In surface modification such as painting or coating, there has to be a degree of roughness for the protection material to adhere to the substrate. There are different wire brushes in use depending on the substrate, for example: brushing in stainless steel and aluminum requires stainless steel and aluminum brush wires to prevent corrosion from occurring.
It should be noted that the corrosion resistance of a substrate will decrease with increasing roughness; this is a result of the increase in residual forces that may lead to stress-corrosion cracking. The pits and crevices developed can accumulate salts and other impurities that may assist in corrosion. Wire brushing goes hand in hand, mostly, with brush coating or painting.
Brushing is eventually not that effective as its results prove to be non-uniform. Hard brushes and the pressure to be exerted are the main control elements whenever brushing is being used in surface preparation. The environment is also important when choosing brushing due to corrosion and hazardous scenarios that may result from spark formation.