Surface roughening

Surface roughening

Surface roughening improves adherence of the coating to the substrate due to the combination of the higher surface area and the anchoring effect of the microporous structure of the roughened surface. The substrate surface may be roughened by either mechanical or chemical method.



Sand blasting, Shot peening, wire brushing, tumbling, hand sanding are used for mechanical abrading. The main disadvantage of mechanical surface roughening is the contamination of the surface with debris and abrasive particles.

The surface should be cleaned with a dry air, clean brush or solvent after mechanical abrading. Chemical methods of surface roughening involve microetching, conversion coatings (e.g. Black copper oxide coating), Anodizing.




Blog, Updated at: 10:07 PM
 
back to top