Results of Testing of Polymer Precoated Steel Sheet According to ASTM A742
a report by KTA Tator
Over 50 years ago, the first plain galvanized corrugated steel pipe was coated with polymer laminate to boost performance and allow for use in more aggressive environments. Providing even greater resiliency to the most sustainable product on the market, steel. This report describes the testing that was conducted on eight coating systems of various zinc weights and polymer coating thickness in comparison to the Requirements for Polymer Coating (Section 7) of ASTM A742/A742M, Standard Specification for Steel Sheet, Metallic Coated and Polymer Precoated for Corrugated Steel Pipe . A summary of the testing is contained in Table 1. The coating thickness measurements (Section 7.3) are contained in Appendix 2; the specification states that the polymer coating is classified by grade corresponding to the thickness in mils on each side. The criteria listed in the specification are detailed in the report sections, and compliance with the requirements is indicated in Table 1.