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26th July 2017, 13:49 | #21 |
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Rover 75 CDT-2001 Join Date: Jan 2009
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I have made an electrolysis bucket. Then i cut the top of an old brake disk to make an electrode at the bottom of the bucket, connected to that i welded on a length of threaded rod, then i have hung the caliper off another length of threaded rod fastend on by steel wire.
Its cooking now. Must say i didnt expect quite so many bubbles. |
26th July 2017, 14:12 | #22 |
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if you use salt in the water, it will destroy any copper or brass fittings. Bicarb is the safest substance to use. (learnt from experience!!)
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26th July 2017, 16:43 | #23 |
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That's really useful to learn...plus I have some Escort calipers to practice with. Thanks
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26th July 2017, 16:59 | #24 |
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Not sure how to work with this new imaging site yet. This should be a photo of the caliper before i started. seems to either come too small or too big. Here it is in the bucket with a smart charger via an old car battery, connecting to the electrodes. Last edited by David Lawrence; 26th July 2017 at 17:23.. |
26th July 2017, 20:42 | #25 |
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I've used this method a lot over the years, mainly on bike stuff or the Minor parts. I leave it for a couple of days with the charge provided by a very old charger unit and a circuit breaker in the line to prevent any mishaps. Always comes up trumps.
I've seen a complete 190 rear subframe and vented disc brakes in a scrapyard, and the calipers may get done this way. |
27th July 2017, 07:44 | #26 |
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I've been using this recently. I have a flat wide container from the local branch of one of the diy stores and some lengths of rebar for electrodes. Electrolyte is laundry soda in water and power is courtesy of an old laptop power supply 18.5v 3A. Works a treat.
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27th July 2017, 08:33 | #27 | |
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Quote:
I am using laundry soda as well. The process appears to be slowing down. Far less bubbles than when i first set it off. Dont know if this is because the rust has mostly transferred now or because some chemical change has taken place in the electrolyte. The electrode is now caked in a thick crust of rust. As a side benefit, the old car battery which i thought was completely dead appears to have been revived as well. |
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27th July 2017, 08:51 | #28 |
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you probably should use the battery with a light bulb in the circuit to control the current .
Used to do it this way years back . along with nickel plating in the same vein. C.
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27th July 2017, 08:52 | #29 |
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I would discard any bolts as there is the risk of hydrogen embrittlement which causes loss of tensile strength.
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27th July 2017, 12:24 | #30 | |
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Quote:
Over time the water level will drop from evaporation (increasing the electrolyte concentration and therefore the current being drawn), just top back up to the previous level with plain water. I've cleaned mine out once now from the build up of rust silt in the bottom of the tank, thinking of adding a drain into the bottom to drain it all into a tall container underneath, let it settle then pump back all but the silt.
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