Thread: Another Con exposed - Electronic rust preventer devices

Originally Posted by wozapinin

I had one on my discovery for years. I disconnected the battery, and hence the rust protector, to de-energise the steering wheel airbag once, and after a couple of days I noticed the tow bar discolouring with surface rust. The paint was so thin the only thing stopping it rusting was the rust protector. That's my experience with these things.

Just like the elephant repellent I rub on the front door. Has always worked a charm. I'm yet to see an elephant near my house

Bad dad jokes aside, the science says it can't work wozapinin. My suggestion is coincidence.

Pricey

Its not an attack on all systems. I understand that one such system has a part number in a Japanese Heavy Earth moving division in Japan and also that Surf Lifesaving has noticed a reduction in rust since having a particular system.

Cheers

No doubt showing how good the salesmen are and that having spent money how easy it is to convince yourself that it was worth it.

John

Who knows. I dont have any such system. If i was ERPS etc and believed in the science i would go on the front foot and advertise...see you should only buy the tried and tested system etc.

Cheers

the systems are used on steel storage tanks as well and anecdotal evidence is they work.

there is one on my range rover...

seems to have worked fine as there is no rust in the old girl that i have been able to find...



(tongue firmly planted in cheek)

they cover themselves by stipulating that there be no scratches or chips in the paintwork or the unit wont work as advertised......

one mob i had 3rd party dealings with used to sell a teflon based coating that they recommended be applied...

don't know how it went stopping rust but it was the best cleaner / polisher i had found up til then...

Originally Posted by gusthedog

Gosh. Next they'll tell us that those ultrasonic rat deterrents you plug in to the wall don't work .
Pricey

Just need a lot more power - in the multi KW range

We made a possum deterrent for the old factory and it worked well using 20-25khz warble tone.

Issues were:

400w ceramic tweeters explode at full power (operated above rated frequency so limited to 50w per tweeter which for 3KW meant lots each with its own final stage amp.

Needed a flashing light to ensure people in the area knew it was on otherwise bad headache after 5 min exposure.

Power bill was a lot even with the much lower power costs back then.

Originally Posted by incisor

the systems are used on steel storage tanks as well and anecdotal evidence is they work.

I've been involved in the design of cathodic protection systems for storage tanks, reservoir roofing structure and buried pipelines. The science is irrefutable.
The problem with cars is when you introduce an insulator into the circuit such as rubber tyres. Think about it. How do you think the power in your house would work if you replaced the service fuses with non conductive rubber blocks?

Originally Posted by Mick_Marsh

I've been involved in the design of cathodic protection systems for storage tanks, reservoir roofing structure and buried pipelines. The science is irrefutable.
The problem with cars is when you introduce an insulator into the circuit such as rubber tyres. Think about it. How do you think the power in your house would work if you replaced the service fuses with non conductive rubber blocks?

Rubber bushes, separate sections etc. Have to break the current.