Interface-Engineered Parylene C Coating for Corrosion Protection of Cold-Rolled Steel
- 1 March 1996
- journal article
- Published by Association for Materials Protection and Performance (AMPP) in Corrosion
- Vol. 52 (3) , 169-176
- https://doi.org/10.5006/1.3292110
Abstract
Vacuum-deposited poly(chloro-p-xylylene), or parylene C, can be used for corrosion protection of cold-rolled steel (CRS) through interface engineering. Interface engineering replaces galvanizing, zinc phosphating, and cathodic electrocoating (E-coating). Parylene C polymer has excellent bulk properties, including its moisture barrier, toughness, and electrical insulation characteristics, but its poor adhesion to most smooth or nonporous substrates has restricted its application. Parylene C coating applied directly to a CRS surface does not provide corrosion protection because there is no adhesion between the film and the substrate. It was shown that adhesion could be improved to the extent parylene-coated CRS panels performed as good as, if not better than, a control (E-coat/zinc phosphate/electrogalvanized steel [EGS]) under conditions of a commercial scab corrosion test. Improvement was achieved by placing an interlayer of plasma polymer to provide interfacial bonding to the CRS surface and the...Keywords
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