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AWWA ACE61643
- Protecting Equipment from Chemical and Corrosion Attack, and Cavitation Erosion, with Polyamide-11 Powder Coatings
- Conference Proceeding by American Water Works Association, 06/17/2005
- Publisher: AWWA
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Cavitation erosion is a major mode of failure of coatings and metals in water industryapplications. Using ASTM Method G-32-98 (Cavitation Erosion Using Vibratory Apparatus),the present research shows that thermoplastic powder coatings based on polyamide-11 (Rilsan® Fine Powder) have exceptional resistance to cavitation erosion, substantially better than othercoatings such as epoxies, used in water industry applications. In fact, polyamide-11 coatingsperform better than metals, including stainless steel. Gravimetric and optical data for a variety ofcoatings and metals are discussed. Moreover, analyses show that in addition to a mechanicalcomponent, there is a chemical component to cavitation erosion. Includes 5 references, tables, figures.
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