As the rusting process occurs naturally, it is impossible to completely stop. By reducing catalysts, or exposure to electrolytes, the process can be lessened. Currently, the most accepted and proven way to prevent rust is to supply an excess of electrons to a structure which can be achieved through three different ways:
- Cathodic Protection (Sacrificial Anode/Galvanic)
- Impressed Current Protection (Rectifier/External Power)
- Capacitive Coupling Protection
Currently Cathodic protection, such as galvanic (sacrificial anode) and impressed current systems are used for applications such as pipelines, pillars, ship and boat hulls, oil platforms and other ‘grounded’ applications.
For ‘free air’ structures, such as automobiles, the only established method of protection is capacitive coupling technology. All of these technologies function in a similar way – by supplying an excess of electrons to the protected metal (Iron/Steel), the oxidation process can be reduced and thus, the lifetime of the structure prolonged.
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