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  #1  
Old April 29th, 2015, 08:01 AM
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Rust - Dealing with it

Hey guys here may be one of the dumbest (or not) thoughts I have had

While I was thinking about having to change the zincs on my boat - I thought, heck why not put zinc's on the chassis of a Defender? I mean rust will attack the less noble of the steels in order of their corrosion qualities. Wouldn't your chassis survive longer if the rust ate zinc's??

I know galvanized is the be all and end all for most - but those that can't do a frame swap, do you think zinc's on the frame in a couple of spots would work?

This was just one of those silly alcohol induced moments of thought...
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  #2  
Old April 29th, 2015, 08:25 AM
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Quote:
Originally Posted by Jonesy View Post
Hey guys here may be one of the dumbest (or not) thoughts I have had While I was thinking about having to change the zincs on my boat - I thought, heck why not put zinc's on the chassis of a Defender? I mean rust will attack the less noble of the steels in order of their corrosion qualities. Wouldn't your chassis survive longer if the rust ate zinc's?? I know galvanized is the be all and end all for most - but those that can't do a frame swap, do you think zinc's on the frame in a couple of spots would work? This was just one of those silly alcohol induced moments of thought...
alcohol at 8am? I think that is a different type of corrosion.
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Old April 29th, 2015, 08:32 AM
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Quote:
Originally Posted by Jonesy View Post
Hey guys here may be one of the dumbest (or not) thoughts I have had

While I was thinking about having to change the zincs on my boat - I thought, heck why not put zinc's on the chassis of a Defender? I mean rust will attack the less noble of the steels in order of their corrosion qualities. Wouldn't your chassis survive longer if the rust ate zinc's??

I know galvanized is the be all and end all for most - but those that can't do a frame swap, do you think zinc's on the frame in a couple of spots would work?

This was just one of those silly alcohol induced moments of thought...
In theory I don't see why not. But the inherent difference between the outdrive of a boat and the frame of a vehicle is how its exposed to what is rusting it. The outdrive is all in 1 place and equally exposed to the saltwater causing corrosion. I think you'd basically have to put a zinc every few inches on the frame to have the same effect (inside and outside).

Also, CHEERS!
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Old April 29th, 2015, 08:47 AM
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alcohol at 8am? I think that is a different type of corrosion.
HAHA - no, it was a thought last night - and I was still thinking about this am, with my cup of joe
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Old April 29th, 2015, 08:50 AM
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Actually this is what is commonly known as "galvanizing". The only way to protect the metal to be saved is by completely encapsulating it in sacrificial metal. Since it isn't always in complete contact with the electrolyte (water) it only rusts where it is, like in mud covered corners or inside chassis rails where it never dries out.

JC Whitney used to (maybe still does) sell some automotive quackery that claimed to stop rust through "magnetism". You'd place these magnets on the chassis and wire them to the negative side of the battery. If you think about how useless that is, you'd laugh.
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Old April 29th, 2015, 08:55 AM
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HAHA - no, it was a thought last night - and I was still thinking about this am, with my cup of joe
I used to work with you, does that "joe" have anything else in it?
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Old April 29th, 2015, 09:29 AM
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Not sure how adding an external zinc to a chassis not submerged in a conductor would be of any benefit.
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Old April 29th, 2015, 09:50 AM
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Not sure how adding an external zinc to a chassis not submerged in a conductor would be of any benefit.
I know Doug - but in theory rust will attack the less noble steel first. That is why on some trucks the aluminium (alu-min-eeum) goes when the underlying steel shows only signs of surface rust....

Anyway - just a musing
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Old April 29th, 2015, 10:32 AM
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Quote:
Originally Posted by Jonesy View Post
I know Doug - but in theory rust will attack the less noble steel first. That is why on some trucks the aluminium (alu-min-eeum) goes when the underlying steel shows only signs of surface rust.... Anyway - just a musing
Rust is not an organism which attacks a host. It's a reaction between oxygen and an object, often encouraged by an additional oxidizer or catalyst. It's not "picking" a more attractive metal in the general vicinity...
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  #10  
Old April 29th, 2015, 11:44 AM
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You could just blast everything with fluid film every couple of years. This stuff in great !
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  #11  
Old April 29th, 2015, 11:48 AM
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well...one metal does corrode preferentially.
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Old April 29th, 2015, 12:03 PM
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I remember years ago there was an article in one of the rover mags that talked about a company that sold a kit for trucks that were operated in mining operations. Same principle as with attaching anodes on boats/ships and certain structures in and out of the ocean. Also believe there is a thread on here from years ago about the same idea you came up with.
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Old April 29th, 2015, 12:23 PM
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Interesting topic Jonesy. My PO (a naval engineer/architect) put anodes on the rear of my non-galvy designa chassis. Pure hypothesis on his part but I never saw a reason to remove them. They have been on for several years now and I still see no corrosive build up on them or my frame. So maybe it is a failed test of a seemingly good idea or if it had worked a brilliant idea. Jury still out.
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Old April 29th, 2015, 12:43 PM
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I have been putting this on all my steel parts after stripping and cleaning. Zinga | Zinga UK

So far so good.
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Old April 29th, 2015, 08:32 PM
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Jonesy, is it you on the back of this truck??
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