How does the overall corrosion resistance of coil coating compare to my current method?
Unquestionably, the corrosion resistance is better using pre-painted metal than metal from a typical post-painted product. Due to the superior cleaning and treating of the strip during the coil coating process, the priming of both sides and the painting of both sides, pre-painted metal has better cut edge corrosion resistance than post-painted metal. A fine line of corrosion may develop on the cut edge of pre-painted metal, but the resistance to underfilm corrosion creepage will be much better than with post-painted metal. The corrosion resistance is also better where nicks and scratches occur. The online tutorial, Cutedge: Tougher Than You Think provides helpful information on this matter and can be viewed on NCCA’s web site www.coilcoatinginstitute.org.
