Electronic Vehicle Rust InhibitorFree Worldwide Delivery 8 Year Product Warranty EvriGard Electronic Rust Control (ERC) uses a technology called Capacitive Pulsing which involves the saturation of negatively charged electrons throughout a metal object by way of precise, multi frequency pulses of charge. To understand how this controls the formation of rust, it is necessary to understand how and why rust forms in metal. How does Rust Form: Metals are made up of millions of negatively