Electromagneitc Rust Protection
- Thread starter whobee
- Start date
If you're talking about the one that you put on a car, it's snake oil.
Read this: http://corrosion-doctors.org/Car/carCP.htm
Read this: http://corrosion-doctors.org/Car/carCP.htm
$300 price for a $3 gizmo. It has never been proven to work. Get yourself a $10 can of Rustcheck from CDN Tire and do it yourself.
Not worth it. And, the link from smiley1437 tells exactly why it doesn't work. Cathodic protection works only if the electrical circuit is complete. This is very difficult if not impossible, to do with a car. Having said that, there might be some old timers on this board who might remember positive ground systems in cars. These cars appeared to rust very fast, because the car body and chassis were positively polarised. For a car body to be cathodically protected, you would need a multitude of devices, or sacraficial anodes, to be installed at precise places. Zinc galvanising accomplishes the cathodic protection because the zinc acts as a sacrificial anode uniformly over the entire car body sheet metal.
We got suckered into one of them stupid things from the Ford dealer in 2001 when we bought a Windstar. I mean if the US Navy uses it to prevent rust on their aircraft carriers, surely it's good enough for us LOL. We had rust showing through when we traded it in 2005. I think it made it rust faster.
It's a good thing... If properly designed. A car body is a much more complex shape than a ship's.We got suckered into one of them stupid things from the Ford dealer in 2001 when we bought a Windstar. I mean if the US Navy uses it to prevent rust on their aircraft carriers, surely it's good enough for us LOL. We had rust showing through when we traded it in 2005. I think it made it rust faster.
It's been alluded too above, but to put some final clarity to it... YES the technology does work.. Navy Ships, bridges, pipelines etc all employ it.. BUT the object using it must be constructed with the technology in mind.. a pipeline is metal from one end to the other.. a ship has a water tight metal hull all the way around.. a car/truck/minivan has metal to plastic to rubber back to metal etc.. it's impossible for one of these devices to pass current to the vehicle in it's entirety.. so for a passenger vehicle it is snake oil.They use it on bridges so the salt wont eat the rebar , so it must work to some degree.
