While it might be impossible to prevent the Faraday Cage effect from occurring completely, there are ways to overcome it. Here are three levels of strategies and tips that will help you better coat inner corners, recesses, and many parts with odd geometries.
Factors affecting the procedure for testing cavitation erosion of GFRP composites using an ultrasonic transducer - ScienceDirect
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Applications
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Faraday Cage - MagLab
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Faraday's Law
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Factors affecting the procedure for testing cavitation erosion of GFRP composites using an ultrasonic transducer - ScienceDirect
How Do You Prevent the Faraday Cage Effect? - Fluorogistx