Protective Coating Options
Supplementing the metallic coating on galvanized and aluminized type 2 steel, the following coatings can be used to develop the desired durability required to meet a variety of service conditions.
Full & Partial Asphalt Coated
A hot-dip coating of bituminous material that coats the lower 20% of the pipe. It has an approximate thickness of .05 inch on the crest of the corrugations, inside and out, and .03 inch for perforated pipe.
Partial Coated Best Use: Asphalt provides extended service life where abrasion at the lower end of the pipe is concerned.
Full Coated Best Use: Asphalt provides extended service life where soil side corrosion is a concern.
Polymeric Pre-Coated Sheets
Pre-coated polymer coatings, such as Dow Trenchcoat protective film, are factory applied to galvanized steel sheet prior to forming the pipe.
Best Use: Polymer pre-coated steel provides a higher level of protection where interior AND exterior corrosion in mildly corrosive and/or abrasive conditions exist.
