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The long term performance of any coating system will be limited by the ability of the applicator to achieve the best combination of surface preparation, application, and curing. In oil and gas facility construction, sometimes the most appropriate coating system is not the best available technology, but rather the system that ensures the highest probability for success based on the environmental conditions during application. An example is presented in which a zinc rich epoxy coating provides clear advantages over the specified inorganic zinc silicate due to circumstances specific to the particular application.
This presentation will outline the results and conclusions of a number of years of testing and experience in surface preparation for high-performance coatings. Testing has shown that there are a number of important surface preparation variables that are not routinely monitored and controlled on coating projects. These variables will be identified and guidance will be provided on appropriate treatment to achieve coating results.
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The FHWA 100-year coating study was initiated in August 2009. The objective of this study is to identify and evaluate coating materials that can provide 100 years of maintenance-free service life for steel bridges.