ASTM D7893-13 (R2018) PDF Download

The ASTM D7893-13 (R2018) standard provides guidelines for preparing, testing, and rating coil-coated metal building products for their corrosion resistance and other related properties.

The standard emphasizes the importance of properly preparing and rating test panels to ensure meaningful test results. It recognizes that coil-coated metals are exposed to various environmental stresses, which can lead to corrosion and premature failure. The evaluation of test panels allows for comparisons between different metal substrates, pretreatments, and coating systems.

The guide acknowledges that while laboratory-prepared test panels provide a relative comparison of substrates and coatings under test, they may not fully replicate the stresses imposed on manufactured components. Therefore, it recommends validating the results on a manufactured product to ensure accuracy.

Additionally, the standard highlights the usefulness of laboratory accelerated corrosion testing in evaluating the performance of metal coatings, pretreatments, and paints. However, it emphasizes that the significance of these tests to actual use should be agreed upon by the participating parties.