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Waterborne Direct-to-Metal Coating Application Development for Bridge Applications

The development of environmentally-friendly corrosion resistant coatings is one area of recent focus in the coatings industry. For example, the Department of Defense owns more than 460,000 facilities around the world and reports the annual cost of corrosion of around $800 million. The coatings used on these structures frequently rely on older polymeric coating systems that do not meet the current requirements for environmental/regulatory concerns.

Product Number: 51323-19032-SG
Author: Balaji Kannan, Tsukasa Mizuhara, Christophe Grenier, Teesta Dasgupta, Brian Okerberg, Rebekah Wilson
Publication Date: 2023
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The development of environmentally-friendly corrosion resistant coatings (reducing total volatile organic content (VOC) in coating) and sustainable coating processes (reducing need for multilayered coatings) are some of major area of focus in the coatings industry [1]. One area of particular interest to the DoD and Army Corps of Engineers is the refurbishment of existing infrastructure (such as metal buildings, bridges and water towers) with new and sustainable coating technologies In this work, the corrosion performance of waterborne coatings under development is assessed by combination of electrochemical impedance spectroscopy and accelerated corrosion testing (ASTM B-117) and benchmarked against some of existing solvent borne coating technologies. Among different WB technologies tested (polyurethane, acrylic etc), the polyurethane technologies showed good performance in both corrosion testing and barrier properties measurements.

The development of environmentally-friendly corrosion resistant coatings (reducing total volatile organic content (VOC) in coating) and sustainable coating processes (reducing need for multilayered coatings) are some of major area of focus in the coatings industry [1]. One area of particular interest to the DoD and Army Corps of Engineers is the refurbishment of existing infrastructure (such as metal buildings, bridges and water towers) with new and sustainable coating technologies In this work, the corrosion performance of waterborne coatings under development is assessed by combination of electrochemical impedance spectroscopy and accelerated corrosion testing (ASTM B-117) and benchmarked against some of existing solvent borne coating technologies. Among different WB technologies tested (polyurethane, acrylic etc), the polyurethane technologies showed good performance in both corrosion testing and barrier properties measurements.

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