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Re: The Rust Project

Posted: Sun Dec 30, 2012 4:20 pm
by Ryki
I feel like your car is the actual test subject, with how you put all the photos :P

Re: The Rust Project

Posted: Sun Dec 30, 2012 4:23 pm
by Yoshi
lol NAY!

Re: The Rust Project

Posted: Fri May 17, 2013 12:31 pm
by Yoshi
Figured I should update this.

SHIT AIN'T RUSTING

I need to research but I think the big issue here is that cars are electrostatically charged. You have the engine constantly shoving voltage/amperage/whatever through the chassis and that helps the oxidization process. Since my piece of metal just sits on some grass, only the exposed areas are rusting. Everything painted is just fine.

I really don't feel like shoving a trickle charger on it. Any suggestions?

Re: The Rust Project

Posted: Fri May 17, 2013 2:08 pm
by M20_fever
zip tie it to the bottom of your car.

Re: The Rust Project

Posted: Fri May 17, 2013 4:04 pm
by Yoshi
I'd want to weld it there. So the electricity conducts better. Not sure I want to do that with my DD though lol.

Re: The Rust Project

Posted: Sun May 19, 2013 5:13 am
by M20_fever
Drill a hole in the plate and bolt it to the sub frame, or trans support?

Re: The Rust Project

Posted: Sun May 19, 2013 6:06 am
by AustinR
I guess it could be the electricity, but I kinda doubt it. My only real reasoning here is think about the tailgates of trucks. Why would those rust? They shouldn't be grounded at all. I think it has more to do with moisture getting in places and sitting there for extended periods of time as well as the insane amount of abuse that cars are put through.
+1 for somehow fastening it to your car.

Re: The Rust Project

Posted: Sun May 19, 2013 9:24 am
by Ryki
+1 for rusty cat tail

Re: The Rust Project

Posted: Sun May 19, 2013 10:28 am
by 87e30
Rusty penis welds?

Re: The Rust Project

Posted: Sun May 19, 2013 3:03 pm
by Yoshi
AustinR wrote:I guess it could be the electricity, but I kinda doubt it. My only real reasoning here is think about the tailgates of trucks. Why would those rust? They shouldn't be grounded at all. I think it has more to do with moisture getting in places and sitting there for extended periods of time as well as the insane amount of abuse that cars are put through.
+1 for somehow fastening it to your car.

Metal man. It's all mounted together so the whole body has SOME current running through it the whole time the truck is on.

Re: The Rust Project

Posted: Mon May 20, 2013 3:16 am
by M20_fever
I dunno, you won't (shouldn't) see any kind of voltage in the chassis even with a high end multimeter. Honestly I think it just needs more salt/moisture to really get close to what an actual DD in the rust belt sees.

Re: The Rust Project

Posted: Mon May 20, 2013 11:10 am
by Yoshi
I doubt you'll see any actual current in the chassis. There's too much metal for that. But think about it. Engine ground straps go to the frame rail, spark plugs ground through the block. All the ECU stuff tends to ground to the chassis. So the current has to run through the chassis either to the ground or back to the neg terminal of the battery. It's proven that even minute amounts of electricity will accelerate rusting. I think if it were high current, you'd see much more rust.

Re: The Rust Project

Posted: Mon May 20, 2013 11:23 am
by Yoshi
http://water.me.vccs.edu/concepts/corrosioncauses.html

influenced by many water characteristics, by the metals used, and by any stray electrical current.


The site also mentioned low ph things like vinegar and such to speed up rusting. I'd like to find a passive way to encourage "stray electrical currents" in the metal and maybe spray it down now and then with something mildly acidic.

Re: The Rust Project

Posted: Mon May 20, 2013 9:50 pm
by M20_fever
Spraying it with vinegar isn't exactly simulating real world driving conditions. Hook a 9v battery to it?

Re: The Rust Project

Posted: Mon May 20, 2013 11:24 pm
by Yoshi
I was thinking more salt water. Vinegar is expensive :)