Is corrosion resistance better with pre-finished steel?
It is important to note that pre-finished steel, even with bare edges, has shown better corrosion resistance than post painted steel because there is less undercut and blistering. The sophisticated technology in the coil coating process prevents spread of corrosion at the paint/substrate interface so cut edges and scratches have better corrosion resistance. In addition, technology has moved forward with corrosion resistance on primer coatings and Cold Reduced (CR) is now available for applications previously recommended as Hot-Dip Galvanised (HDG) only.
