Committee Name: C.1.3.D, Polyurethane Coatings
Committee Chair Name and Company: Ahren Olson, Covestro
Description of Contents/ Technical Revisions:
This revision of the 2007 version of Paint 40 incorporates language revisions parallel to the 2017 revision of SSPC-Paint 41, including references to SSPC-PA 15, “Method for Preparation of Coated Test Panels,” and SSPC-PA 16, “Method for Evaluating Scribe Undercutting on Coated Steel Test Panels Following Corrosion Testing,” which were issued after the 2007 revision of Paint 40 was completed. The water required for immersion testing has been changed from deionized water to potable water. The table summarizing performance requirements has been divided into two tables, one for physical test requirements, the other for accelerated laboratory test requirements. In addition, the description of Type I formulations no longer implies that Type I coatings can be used in continuous immersion. Coatings classified as Type II must meet fresh water immersion testing requirements and can be used in fresh water (continuous) immersion service. Other changes are considered editorial.
Stakeholders Value Statement (how the standard can be used):
This standard contains minimum laboratory performance properties for SSPC-Paint 40, a moisture-curing primer containing zinc as a corrosion inhibitive pigment. The standard can be used by coating manufacturers to benchmark performance properties for their products, and by specifiers to set qualification criteria. Coatings meeting requirements of Paint 40 are suitable for use under compatible intermediate and topcoats (often other polyurethane coatings) and can cure in the presence of moisture. The required amount of humidity necessary for proper cure varies with the formulation, so this is not addressed in the standard.