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[Auto Addict]

http://www.megapulse.uk.net/FAR/rustProcess.htm

Not for me, but a mate who's got a classic car is interested in it.

Opinions welcomed

[Omegatoy]

have to be honest here am not an electronics expert!!! however the way it is supposed to work is exactly the same process as using a positive field on the car to attract paint when spraying!!! used mostly on plant machinery i must admit, but I think its highly unlikely it will keep corrosion at bay, mainly because if it was any good it would be used on things like ships, barges, oil rigs etc ad it isnt!!! also bet it gives you a static shock every time you get out of the car!!
polish up top and waxoyl underneath and in the joints is the best way to keep rust at bay!!
just my opinion of course!!
Omegatoy  

[Auto Addict]

Thats what I thought.

[theolodian]

These had some popularity 15 years ago, haven't heard anything since so I doubt they are effective.

[Ken T]

I think ships use a block of Magnesium bolted on somewhere, a 'sacrificial anode'. It corrodes while the ship doesn't. You could always try bolting a chunk onto your car, although it might be 'illuminating' if the car ever caught fire

[omegaV6CD]

have to be honest here am not an electronics expert!!! however the way it is supposed to work is exactly the same process as using a positive field on the car to attract paint when spraying!!! used mostly on plant machinery i must admit, but I think its highly unlikely it will keep corrosion at bay, mainly because if it was any good it would be used on things like ships, barges, oil rigs etc ad it isnt!!! also bet it gives you a static shock every time you get out of the car!!
polish up top and waxoyl underneath and in the joints is the best way to keep rust at bay!!
just my opinion of course!!
Omegatoy  

I'm almost sure they use electric charge on ships to stop corrosion, also i read many years ago from a similar advert that Fiat was using something like that to stop rust problems.

[SteveD]

If it does create some sort of charge it could repel some raindrops! Try running a tap slowly and then holding a balloon near the running water - the water will curve round the balloon without touching it. It couldn't be used on boats or rigs - the charge would just be lost in the water.

[hotel21]

Big deep sea ships (and the smaller ones too, probably) have had sacrificial anodes for years.  Didn't stop them rusting though, only possibly reduced it, despite the cost.

That and the couple of tonnes of assorted red lead and other type paints and potions painted on the hulls still didn't have the effect.....

If it didn't work there, why should it work on your 'Meega?

[theolodian]

I think ships use a block of Magnesium bolted on somewhere, a 'sacrificial anode'. It corrodes while the ship doesn't. You could always try bolting a chunk onto your car, although it might be 'illuminating' if the car ever caught fire

I don't know about large ships, but motorboats usually have blocks of sodium.









Umm, Zinc  

[BigCat]

The basic anode/cathode/electron transfer theory works well, thats what's happening inside your car battery. But in order for it to work, it needs an electrolyte - battery acid - or in the case of a ship, salty sea water. The problem for a ship is the infinite volume of electrolyte. I used to run a supercharged GM 3-71 diesel tractor with a passive sacrificial anode just inside the filler cap and that worked well. It doesn't stop it, just slows it down - as per Hotel21's comments.

Supposedly this system gets around the electrolyte problem not by submerging your car in water , but by using the paint layer as a capacitor (think of a capacitor as a very short term battery - two conductive surfaces in parallel but not actually touching, with the static charge across the two surfaces providing the voltage; the larger the surfaces the greater the charge, the closer the two surfaces without actually touching the greater the charge etc.) so in theory the ability to supply sacrificial electrons should be high, but where are they coming from, the exposed metal?

[Auto Addict]

Big deep sea ships (and the smaller ones too, probably) have had sacrificial anodes for years.  Didn't stop them rusting though, only possibly reduced it, despite the cost.

That and the couple of tonnes of assorted red lead and other type paints and potions painted on the hulls still didn't have the effect.....

If it didn't work there, why should it work on your 'Meega?

It's not for my Meega, a mate asked me what I thought of it for his classic car.

I think it's a waste of money myself.

Just wanted some opinions....

[Marks DTM Calib]

Cant se how it would be effective.....the patches which are palced on the pitnwork would need to be in contact with the rust causing water....and that aint gonna happen unless its lashing it down!

Most rust occurs when the wate rists in bits you dont want it to long after the rain or spray has stopped.

[Markjay]

I asked a friend about this, he is an electrical engineer and as it happens also a keen yachtsman, he said it was indeed a very popular setup with boats, Zinc is used on metal boats and an electrical system on light-alloy boats, as well as on oil pipelines, but he also generally said what mark DTM said, i.e. that the fact that it works on boats (and pipes) does not mean that it will work on cars due to the different conditions… it may or may not, but needs testing to prove it.

[Markjay]

On the other hand, slightly modifying the current will help keep the cattle away while driving through the countryside…  

[Markjay]

Hijacking the thread for a minute (sorry AA, hope you don't mind...), a British Gas plumber that visited our house recommended that we install an anti lime scale device (we had problems with a seized over-flow float that was stuck because it was covered in sediment) - he said it was fantastic and he had one installed in his house. Any idea if this one looks like a good idea, or is just a gimmick..?


http://www.screwfix.com/app/sfd/cat/pro.jsp?id=13487

http://www.screwfix.com/app/sfd/cat/pro.jsp?id=18834

These devices apparently work by creating magnetic field which supposedly prevents formation of lime scale, but does it work...?