RustStop® RS-5 (formerly Rust Stop RS2000) electronic rust prevention successfully combines both Impressed Current and Sacrificial Anode technologies and effectively overcomes the limitations of "classic cathodic protection" to help prevent rust on vehicles.   Rust is basically an electrochemical process. The RustStop® RS-5 System works like a "rust magnet" attracting electrons that would otherwise be rusting your vehicle. The RustStop® Rust Magnets™ then corrode, instead of your vehicle, giving Visual Proof that the System is preventing rust!

  This diagram shows the RustStop® System turned OFF. As you can see, the Free Electron is reacting with the Iron Atom and causing rust. Sacrificial Anode: When installing RustStop®, four sacrificial anodes, termed "Rust Magnets™", are strategically located and attached to the vehicle where water will collect or run.

When the RustStop® System is turned ON, a positive charge of +45 volts is applied onto these Rust Magnets™ (sacrificial anodes) by the RustStop® Command Module. This causes the Iron Atoms and Impurity Atoms to have a negative charge (-) compared to the Rust Magnets™. The Free Electrons are now pulled through the steel to the Rust Magnets™ at +45V instead of to the negatively charged Iron Atoms (-).   When these Free Electrons arrive at the Rust Magnets™, the Rust Magnets™ corrode (sacrifice). This means that the corrosion that forms on the Rust Magnets™ would have been corrosion forming somewhere else on the vehicle.
  The RustStop® Rust Magnets™ (sacrificial anodes) corrode giving Visual Proof that the system is preventing rust.   

You will see a visual indication that it is preventing rust !

  Note: RustStop® RS-5 electronic rust prevention functions extremely well due to the fact that the output voltage on the Rust Magnets™ is stepped-up to 45 volts, thus creating a large voltage difference between the vehicle and the Rust Magnets™, this in turn means the attraction of the Free Electrons to the Rust Magnets™ is exceptionally strong making this system very effective.  Impressed Current: The essential factor in impressed current is that the Free Electrons in the steel of the vehicle are controlled by the application of an impressed current from the RustStop® RS-5 Command Module. The normal weak attraction of Free Electrons toward the Iron Atoms is now disrupted by forcing a uniform flow of Free Electrons (impressed current) throughout the metal of the vehicle. In short, the constant flow of Free Electrons in the metal helps prevent them from reacting with the Iron Atoms as rust.   RustStop® RS-5 uses both Sacrificial Anode and Impressed Current technologies to be the most effective electronic vehicle rust prevention system available.