ZINC PAINT - A TECHNICIAN'S COATING?

Zinc rich paint systems correctly applied under favorable conditions have shown outstanding protection characteristics for the underlying steel under a variety of corrosive environments. The overspray from most zinc paints dries within seconds while still airborne and can be removed as easily as dust form sorrounding surfaces. The corrosion resistance of the Fremont Bridge superstructure coated with zinc paint is quoted as an example of the paint's durability. Unsuccessful examples of the use of zinc coats may also be quoted. A review of the considerable literature concerning the use of zinc paint reveals the physical near-impossibility of application of the various coatings in conformance with the recommended procedures, as well as the failure to provide for "human error." Procedural instructions describe within close tolerances, the degree of steel surface preparation to be obtained. this is followed by instructions for mixing and applying the various coatings. Literature review reveals conflicting recommendations regarding the use or non-use of zinc paints. It is urged that care and thought be exercised in the selection of zinc coating systems for various projects.

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  • Accession Number: 00084779
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 2 1975 12:00AM