How Electronic Rust Protection Works

How Electronic Rust Protection Works

Controlling and preventing rust or corrosion electronically is not a new technology. Cathodic protection systems have been used to control corrosion in ships, jetties and land-based fixed structures like bridges, tanks, and subterranean metal structures for over 100 years. Traditional Cathodic Protection systems require a sacrificial anode which is totally separated from the steel being protected. This technology relies on soil or water surrounding the metal structure and the anode. With the aid of an electrical charge, the sacrificial anode would corrode because the anode was made of a “softer” metal compared to the metal it was protecting.

Free air structures such as motor vehicles are not submerged in water or buried in the soil so a different technology is required.  The original inventor of the CAT System discovered that by “impressing” or “forcing” an alternating current (AC) with a specific waveform and frequency into the metallic body of a motor vehicle the rusting process could be interrupted (slowed) and in some cases stopped altogether. This technology was thoroughly tested in the UK and proven to be effective before it was released onto the Australian market in 1989. The CAT technology has been continually tested and refined ever since and many improvements have been made along the way. It should be noted that laboratory and real-life testing has proven the CAT technology interrupts the rusting process, however the exact reason why is still often debated amongst academics.  It is widely believed that “stray currents” produced by the myriad of electrical connections and electronic devices in modern motor vehicles are what promote corrosion, and the CAT technology simply causes these stray currents to behave in an orderly manner instead of just randomly moving through the metal of the vehicle. This theory is supported by salt fog chamber testing; the most recent conducted independently by SGS Laboratories in April 2015. (report available on request)

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