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Caliper electrolysis

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Old Jan 2, 2020 | 01:41 AM
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Default Caliper electrolysis

Hey All,

I'm planning to remove rust from my brake calipers using electrolysis prior to detailing them.




Anyone have experience with this? Is this a no-no on calipers ?

MTIADC3
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Old Jan 2, 2020 | 02:55 AM
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your going to pull them apart first right ?
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Old Jan 2, 2020 | 03:06 AM
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Originally Posted by bazza77
your going to pull them apart first right ?
Oh yes. They are already completely disassembled. I just didn’t take a pic of that.
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Old Jan 2, 2020 | 03:34 AM
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Which method were you planning on using ?
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Old Jan 2, 2020 | 03:55 AM
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Originally Posted by bazza77
Which method were you planning on using ?
The calipers seem to have mostly surface rust. I'd like to paint them red or yellow ???

I am thinking a plastic vat with 3 gallons of water, 3 TBS of laundry soda, sacrificial steel, and a car battery charger.
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Old Jan 2, 2020 | 06:42 AM
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Yep , I did some trailing arms using Bi carb soda , cant remember the amounts , but it worked well . you will have to move the sacrificial steel around to get "line of sight "on the pieces so it will take a while .

Kind of interesting to watch , as soon as you turn on the power ,lines of tiny bubbles come off the pieces , carrying all the corrosion .

Going out to the shed the next morning and the tub had a heavy rust scum on the surface .
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Old Jan 2, 2020 | 07:42 AM
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I used Evaporust on my calipers and it worked great. A plus side is that Evaporust will not attack the rubber seals, so they do not have to be disassembled


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Old Jan 2, 2020 | 08:28 AM
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Originally Posted by DorianC3
The calipers seem to have mostly surface rust. I'd like to paint them red or yellow ???

I am thinking a plastic vat with 3 gallons of water, 3 TBS of laundry soda, sacrificial steel, and a car battery charger.
Used the same setup on some A-arms in a large plastic barrel with rebar and a battery charger.
Worked remarkably well.
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Old Jan 2, 2020 | 09:27 AM
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I would make sure that the calipers have been sleeved first. I glass beaded mine prior to painting. The Evaporust looks like a great product. Jerry
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Old Jan 2, 2020 | 10:10 AM
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Originally Posted by DorianC3
The calipers seem to have mostly surface rust. I'd like to paint them red or yellow ???

I am thinking a plastic vat with 3 gallons of water, 3 TBS of laundry soda, sacrificial steel, and a car battery charger.
I would worry about pitting the bores. Blast the outside and paint them.
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Old Jan 2, 2020 | 11:11 AM
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You're not going to damage the bores with electrolysis, unless the bores are rusty. And, if that's the case, the caliper should be honed or replaced.
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Old Jan 2, 2020 | 11:47 AM
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Another vote evaporust..strain reuse..i left mine bare after..


Reassembled
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Old Jan 2, 2020 | 02:12 PM
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When I started my restoration I used the electrolysis method for lots of parts. I have since moved on to sand blasting small parts in a bench top blaster and for larger parts I've been soaking parts in a commercial rust remover such as evaporust. The electrolysis method works good but it takes a day or two. You'll also need to change out the washing solution often and the sacrificial metal has to be ground down to expose more bare steel for it to work efficiently.

Last edited by teamo; Jan 2, 2020 at 02:17 PM.
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Old Jan 3, 2020 | 12:05 AM
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Originally Posted by interpon
Another vote evaporust..strain reuse..i left mine bare after..


Reassembled
Great results !!! I'd use the stuff in a heartbeat.

But what you gotta understand; folks, is that over here we are operating at a handicap. No Evaporust to be found. I couldn't even find carbide tipped Lenox blades for a sawzall.

Bare metal clear coated ?

Last edited by DorianC3; Jan 3, 2020 at 12:06 AM.
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Old Jan 3, 2020 | 12:31 AM
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You could always have it plated with copper. Then it would turn a nice green patina....like the Statue of Liberty...
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Old Jan 3, 2020 | 03:05 AM
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Originally Posted by 7T1vette
You could always have it plated with copper. Then it would turn a nice green patina....like the Statue of Liberty...


Here goes nothing





Ummm, let’s put this outside.
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