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A long-term project such as the current Brooklyn Bridge Rehabilitation Program, known as Brooklyn Bridge Contract 6, presents a great opportunity to collect vast amounts of data and records relating to the total coating replacement on a historic landmark. On any project, especially one of this scope, the project team has to deal with many obstacles, both expected and unexpected, and significant unknowns.
A long-term project such as the current Brooklyn Bridge Rehabilitation Program, known as Brooklyn Bridge Contract 6, presents a great opportunity to collect vast amounts of data and records relating to the total coating replacement on a historic landmark. On any project, especially one of this scope, the project team has to deal with many obstacles, both expected and unexpected, and significant unknowns. While a project design and specification aim to eliminate these roadblocks, reality is always more unpredictable than what’s on paper. Despite the overall quality of the newly applied coatings at the Brooklyn Bridge, there were a few occasions during Brooklyn Bridge Contract 6 when, through a variety of factors, questions were raised about the integrity of the final coating product, with deficiencies noted that had to be addressed, requiring careful evaluation, investigation, assessment, testing, analysis and proper correction. Adhesion tests were a big part of this process. In this paper, we will highlight three case studies involving adhesion testing.
Pull-off adhesion testing is widely used to assess the protective coating process. It is also used to determine if a coating is fit for service in new construction and for repairs to existing structures. The result is often critical to the acceptance or rejection of a coating process, as the adhesion value quoted by the paint manufacturer can be adversely affected by aspects of the coating process. Low adhesion values are indicative of premature failure of the coating and are often due to inadequate surface preparation of the substrate.
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Pull-off adhesion testing of coatings is commonly used for product testing and qualification as well as quality control / quality assurance. However, initial adhesion values do not necessarily correlate with service life of coatings or their corrosion protection performance. Adhesion of several product chemistries to steel is examined in this study before and after immersion exposure. Results are presented within the context of laboratory corrosion testing in an effort to investigate the significance of adhesion testing in modern lining systems.
This comic book features Inspector Protector and his super hero team, working to save the world from the corrosion Grubzz. A classroom supplement intended to inform young students about corrosion engineering. Comic Book format - 24 pages.