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Saving A Jet JWP-15CS From Dump #3: Electrolysis Attempt #1

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Blog entry by Holbs posted 03-18-2015 03:03 AM 2081 reads 0 times favorited 10 comments Add to Favorites Watch
« Part 2: disassembly day 1 & 2 Part 3 of Saving A Jet JWP-15CS From Dump series Part 4: Electrolysis Attempt #3: Failure »

I picked up supplies monday after work for a quickie start at this first attempt. Home Depot has 12” and 24” 3/8 rebar at affordable price tags, bout some 12 gauge wire, a tub. I was unsure about laying this rusted Jet handle rod right on the bottom of the tub so used some scrap plywood to raise it up. Connected my negative battery charger lead right to the rod under the water and positive to the copper ring attached to the rods. Fully expecting a nuclear explosion in my garage, I plugged in my battery charger and turned it on to the 10 amp selection. Bubbles immediately started to arise from all 4 rebar rods and from the Jet handle rod. The battery charger looked to be hovering around 1 or 2 amps (can’t exactly tell due to the dial not being specific under 10 amps). Let cook for 12 hours. Not too shabby of the end result, but I know can be done better. I forgot one thing: the battery terminal alligator clips are made out of copper. Oooops.

Tonights attempt I used steel cable from exercise gym I have laying around to hold the 2nd rusted Jet handle rod up off the bottom of the tub. 3 gallons of water + 3 tablespoons of washing soda. This time, the battery charger is upto 5 or 6 amps. Will see what happens come morning.

-- Yes, my profile picture is of a Carpenter Bee! The name is derived from the Ancient Greek "wood-cutter"



10 comments so far

View TheFridge's profile

TheFridge

5765 posts in 952 days


#1 posted 03-18-2015 03:13 AM

Kinda wondering what happens myself.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View Holbs's profile

Holbs

1378 posts in 1495 days


#2 posted 03-18-2015 03:16 AM

I have some jack chain (used to hold light strips in warehouses and such). Was about to use them til I realized one roll was ‘galvanized’ and the other was ‘zinc plated’. was unsure about using them so didnt. Tried to find metal coat hangars (steel? do not know what metal coat hangars are actually made of), but I have all plastic! Only thing I found was the steel cables used in my gym equipment.

-- Yes, my profile picture is of a Carpenter Bee! The name is derived from the Ancient Greek "wood-cutter"

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TheFridge

5765 posts in 952 days


#3 posted 03-18-2015 04:38 AM

So it destroyed the copper clips? I get steel tie wire that doesn’t have any kind of coating from electrical supply houses all the time. Places that deal in masonry supplies would definitely have many kings of uncoated tie wire.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View taoist's profile

taoist

120 posts in 1957 days


#4 posted 03-18-2015 01:47 PM

Go to a dollar store or just any cheap place and get a steel cookie sheet. Be sure to take a magnet so you can verify the steel content. I would cut off the rim, if you are using a 5 gal pail so you can curve it, and then place it in your water bath with the washing soda and connect your positive lead, from the battery charger to the cookie sheet. You will have much better results with the cookie sheet than with the rebar because of surface area.

View a1Jim's profile

a1Jim

115202 posts in 3043 days


#5 posted 03-18-2015 03:23 PM

View Tim's profile

Tim

3119 posts in 1427 days


#6 posted 03-18-2015 05:02 PM



Go to a dollar store or just any cheap place and get a steel cookie sheet. Be sure to take a magnet so you can verify the steel content. I would cut off the rim, if you are using a 5 gal pail so you can curve it, and then place it in your water bath with the washing soda and connect your positive lead, from the battery charger to the cookie sheet. You will have much better results with the cookie sheet than with the rebar because of surface area.

- taoist

Great tip. It’s the surface area but specifically the line of sight from the cookie sheet to the piece you’re de-rusting that makes the difference. By wrapping it around, you get more direct line of sight to more of the piece.

View MrUnix's profile

MrUnix

4234 posts in 1665 days


#7 posted 03-18-2015 07:16 PM

Couple of thoughts..

First off, with that setup and those small pieces you are doing, 12 hours is about 11 hours too long! I’ve had way more rusty stuff completely cleaned in a half hour or so. I bet you will find little difference between cooking them for an hour or twelve.

Secondly, electrolysis will convert the red rust (ferrous oxide) back into a black rust that is composed mostly of magnetite. You need to scrub your parts after removing from electrolysis to get rid of that. A wire brush, scotch-brite pad or whatever. Once removed, you will have a nice shiny part. It doesn’t look like you removed it on the parts shown in your first picture.

Also, for many parts, mostly cast iron, once you take it out of the bath and remove the black stuff, sometimes you will see surface rust start to form… sometimes right before your eyes just minutes after removal. You need to keep that from happening with the bare metal, so dry it completely and then use something to protect it. If it’s going to be painted, give it a shot of primer. If it’s going to be left shiny, give it some wax or a light coat of oil. I like hitting it with a dilute solution of phosphoric acid as well (gets rid of any surface rust that may have already formed and etches the metal slightly in preparation for paint).

Cheers,
Brad

Oh, and don’t worry about the copper battery clips.. they will not be harmed, although they will come out a little slimy :) I like to get some copper wire and hook it to the part, extending up above the electrolyte so I don’t have to deal with cleaning off the clip.

-- Brad in FL - To be old and wise, you must first be young and stupid

View Holbs's profile

Holbs

1378 posts in 1495 days


#8 posted 03-18-2015 10:19 PM

These were first 2 attempts with the Jet handle bars that were “somewhat” rusted. 12” or so long. After 12 hours (overnight, basically), the first attempt connecting the negative brass battery clamp to the rod and second attempt of using steel cable to hang the 2nd rod… both came out the same: rust gone with magnetite still there (yet to be rubbed off). So, 100% good results.
Now that I have experience, I’ll get a larger plastic tub to fit the kickback rollers and other rollers (much more rusted) and fine tune my setup into something more… classy :)

Jim… I did buy a gallon of EvapoRust for the small parts: bolts, washers, springs, etc. Started Monday evening with that, and before bed mixed with wooden spoon (unsure if that helps or not but doesnt hurt). Forgot to take them out Tuesday. Been sitting in the liquid for 48 hours. They look new ! Well, better than what they were :) Do I pour this liquid back into the gallon container… as in, re-useable ? Possibly strain with coffee filter? Or ditch it?

MrUnix… so, ok to use copper wire (much more easier to get since i have a bunch of 12/2 laying around) to hook the part in the middle? I’ll do that more often as it just seems…easier than the stiff steel cable i’m using from gym equipment.

taoist… i really like the idea of that steel pail bucket or cookie sheet. will keep in mind for future projects in this

-- Yes, my profile picture is of a Carpenter Bee! The name is derived from the Ancient Greek "wood-cutter"

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MrUnix

4234 posts in 1665 days


#9 posted 03-18-2015 11:30 PM

Evaporust is reusable, but I wouldn’t pour it back into the fresh stuff in the container. I keep an old 1 gallon paint can with a wire mesh basket in it to make dunking easier. Over time, it will start working slower and slower. Just use it until it doesn’t work any more, or you get tired of waiting so long.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

View ic3ss's profile

ic3ss

387 posts in 2242 days


#10 posted 03-21-2015 11:56 PM

I used this method to clean up a few old hand planes. This took off the japanning without effort and took the rust with it.

Wayne

-- "I am endeavoring, ma'am, to construct a mnemonic memory circuit using stone knives and bear skins."

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