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Various polymeric coatings have been exposed to natural saltwater environments in Buzzard' s Bay, MA and at La Costa Island, FL for the last 18 years and 21 years respectively. The coating systems were applied to 8 inch (20.32 cm) by 8 inch (20.32 cm) by 40 feet (12.19 m) A36 steel "H" pilings. The depth of the water ranged from 4 feet (1.22 m) to 8 feet (2.44 m). Periodic visual inspections have been conducted to evaluate the performance of the coating/ primer systems in the splash zone and in the immersed zone. The coatings had windows to evaluate the under film corrosion attack by saltwater present near the Cape Cod canal. The coatings were evaluated according to ASTM visual standards at low tide. Results of the coating inspections and an evaluation of their effectiveness in preventing the corrosion of steel pilings in seawater will be presented.
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Surface Applied Corrosion Inhibitors (SACI) remain controversial as to effectiveness and the ability to compare materials from different manufacturers and technologies. These materials are liquids applied to the surface of concrete to control the corrosion of embedded reinforcing steel. This presentation will discuss the performance and relative importance of a recent testing program for corrosion inhibition and other performance parameters using documented test methods.
This paper will provide information on the standards used in evaluating and determining correct application and selection of protective coatings and linings used in the wastewater industry. It will also highlight certification that can be used in evaluating contractors and inspection companies used in the coating and lining process.
Coatings are utilized in a wide variety of applications (floor, wall, roof, etc.) and on many different substrates (concrete, steel, drywall, etc) in commercial architectural settings, and performance requirements will obviously vary depending on the intended use and environment.