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Painted aluminum extrusions are a common architectural material used in the manufacture of windows and door frames. The applied coatings, typically in a shop atmosphere, may not always work once installed in the field due to a variety of fabrication defects and or exposures.
Painted aluminum extrusions are a common architectural material used in the manufacture of windows and door frames. The applied coatings, typically in a shop atmosphere, may not always work once installed in the field due to a variety of fabrication defects and or exposures. The correct coatings may be selected, though without careful attention to the fabrication process, the coating may fail miserably, even before installation is completed. In addition, the expected exposure of the aluminum is not always provided to the architect/designer which can result in selecting an improper coating material. Both actions result in premature coating failures. This paper illustrates examples of these concerns and the resulting options to correct these coating defects in the field.
In the past, the present and undoubtedly in the future, coating specifications will be written and included in bid packages that will end up on your desk, mine and our fellow colleagues. Often these specifications are poorly written, boiler plated or haphazardly thrown together to hopefully provide us with enough information to successfully win and complete a given contract.
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To evaluate through fracture toughness tests the susceptibility of SDSS to HISC and to determine the effect of the cathodic protection potential and the stress intensity factor rate (K-rate).
Upon installation of a typical thin film coating system, extensive dynamic cracking was discovered in concrete chemical secondary containment structures. After multiple failed attempts to repair cracks using standard coating products, the decision was made to proceed with equipment installation in hopes of maintaining schedule while the coating details could be evaluated.