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Weathering performance of 2-component polyurethane topcoats used in corrosion protection applications, e.g. bridges, marine, stadiums, etc., is discussed with emphasis on some key formulating variables. Variables such as isocyanate index and resin selection are compared in an accelerated weathering study using various polyurethane topcoats. The results are referenced to SSPC polyurethane coating specifications which are often used in the industry to define performance criteria.
This is the final paper in a series of papers that discusses weathering performance of 2-component (2K) polyurethane topcoats used in corrosion protective coatings applications, e.g., bridges, marine, stadiums, etc., with emphasis on the key formulating variables affecting performance.
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Third-party paint inspection contracts provided an immediate, tangible benefit in supplying a qualified, certified coating inspector full-time to a painting project. Inspectors could be rapidly deployed and provided someone to the project with broad experience in painting projects; however, simply providing a third-party contract paint inspector to a project did not always ensure the project was completed properly.
The role of a Coating Inspector has evolved considerably over the past few decades, and the responsibilities have increased over what used to be a rather straightforward job: to verify that surface preparation and coating application meet the project specification requirements. Today there are week-long or multi-week basic and advanced coating inspection courses, specialty courses that are industry-specific (e.g., bridge, nuclear), courses that are substrate-specific (e.g., concrete coatings inspection) and even coating-specific (e.g., inspection of thermal spray coatings).