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post #1 of 7 (permalink) Old 09-16-03, 07:15 PM
badkuk
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rustproofing with zinc bars

Hi All!

A good day to you all. i read in a forum somewhere that you can actually rustproof your car by welding two pieces of zinc bars to the chassis and body of your car; supposedly the zinc bars have some electrochemical properties that makes your car repel oxygen, chemicals, etc. Does this truly work?

 
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post #2 of 7 (permalink) Old 09-17-03, 02:18 AM
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i think boats use zink strips to prolong rust....duno how well it would work with a car, plus it would look shocking

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post #3 of 7 (permalink) Old 09-17-03, 02:41 AM
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Re: rustproofing with zinc bars

It would only work if your car was immersed in water all the time.

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post #4 of 7 (permalink) Old 09-17-03, 02:50 AM
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Re: rustproofing with zinc bars

It will definately work with the metal that is touching the zinc bars, anywhere it's not touching it aint gonna do shit.

Zinc is very good at oxiding, better then iron, so the way it's stops corrosion is it corrodes instead of the iron it's touching and takes all the oxygen with it. Hence your iron doesn't turn to rust.
 
post #5 of 7 (permalink) Old 09-17-03, 02:20 PM
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All outboard engines have a "sacrificial anode", usually made of Zinc. Often this is also the trim tab behind the prop. When immersed in salt water a current flows between the dissimilar metals. I am not sure of the physics but this protects the alluminium alloy of the outboard from corrosion from the salt water ( I think it is ions being passed to the alloy). You can do this to inboards or even cars by putting an annode in the water jacket.

As far as protecting a whole car - I am fairly sure you need it to be in water, and salt at that I think.

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post #6 of 7 (permalink) Old 09-23-03, 10:18 PM
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Re: rustproofing with zinc bars

You're right Pat, marine applications only. Ships hulls and outboard motors use a sacrificial anode, on a car chassis it will be a heavy and ugly decoration. They also need replacing regularly as they tend to oxidise and shrink over time.

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post #7 of 7 (permalink) Old 09-24-03, 03:08 AM
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Re: rustproofing with zinc bars

didnt porsche use something like this

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