Author Topic: Flash Rust  (Read 513 times)

Offline Paul Ragghianti

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Flash Rust
« on: August 11, 2019, 01:51:40 PM »
I've got a Griswold #8 pan that I've had in the lye tank for a month. I've noticed bright red streaks on the outside and bottom of the pan as I it cleaned it off in the sink. Kinda like a salts bleed. The pan does have some rust inside which I've partially cleaned with vinegar. My dilemma is the flash rust I get when warming the pan on the stove. It doesnt stop returning. I've never run into this problem before. Any recommendations?

Thanks,

Paul

Offline Russell Ware

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Re: Flash Rust
« Reply #1 on: August 11, 2019, 07:06:10 PM »
Many questions come to mind here. Can you post any photos of the issue?
How old is your lye bath, and what kind of lye did you use?
What was the purity of the lye?
Does the pan show any signs of being over-heated where the streaks are?
Has anything non-ferrous been clean in the lye bath?
More questions come to mind, but photos would help.

Offline Paul Ragghianti

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Re: Flash Rust
« Reply #2 on: August 12, 2019, 04:05:38 PM »
Russ, after I posted this I set the pan in a vinegar bath for about 5 hours. Alot more gunk and rust came off the pan but still needs some major scrubbing. Not as much flash after the vinegar.

Offline Russell Ware

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Re: Flash Rust
« Reply #3 on: August 12, 2019, 04:45:06 PM »
Hopefully, it just needs more time in the lye. Do you have an electrolysis tank?

Offline Paul Ragghianti

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Re: Flash Rust
« Reply #4 on: August 13, 2019, 09:30:30 PM »
No, but I'm leaning that way.

Can you use a regular car battery charger to do this or do I need a bigger one with more juice?

I read thru the electrolysis section but the chargers used seemed to be big ones.

Thanks,

Paul

Offline Duke Gilleland

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Re: Flash Rust
« Reply #5 on: August 14, 2019, 05:12:53 AM »
Have used smaller one years ago and it worked. Large or small, it has to be a MANUEL charger.
Nowhere But TEXAS!

Offline Spurgeon Hendrick

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Re: Flash Rust
« Reply #6 on: August 19, 2019, 11:53:28 AM »
Quote
...  it has to be a MANUEL charger.


Paul, it would be better if you get a manual charger. If you take Manuel’s charger, he might report you to the police. ;)

Offline Lee Bowen

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Re: Flash Rust
« Reply #7 on: August 19, 2019, 02:12:04 PM »
Nyuk nyuk nyuk.

Offline Duke Gilleland

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Re: Flash Rust
« Reply #8 on: August 19, 2019, 02:39:04 PM »
Slip of the key ;D  The rust is about all the vinegar bath helps. A good ZAP tank set up helps in all areas [smiley=thumbsup.gif] made me think back about something... Are there any of those stainless barrels left around that some folks were using years ago? [smiley=scratchchin.gif]
« Last Edit: August 19, 2019, 02:50:23 PM by DG_TX »
Nowhere But TEXAS!

Offline Spurgeon Hendrick

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Re: Flash Rust
« Reply #9 on: August 19, 2019, 04:15:50 PM »
A customer of mine offered me one of his old stainless steel drums. I was going to take but decided against it. I was worried about it eventually developing a hole and then where who I be able to get rid of it.

Offline Russell Ware

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Re: Flash Rust
« Reply #10 on: August 19, 2019, 06:35:01 PM »
I have been using a cylindrical stainless steel plate inside of a plastic trash can for 6 years. No holes yet, and I've cleaned hundreds of pieces.

Offline Valerie Johnson

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Re: Flash Rust
« Reply #11 on: August 22, 2019, 05:57:09 AM »
There should be no reason for a stainless steel drum to develop holes from being used as an electrolysis tank, The only concern I would have is possible electric shock as you are using the positive attached to the tank(drum) so you would have to be careful about what the negative comes in contact with especially since you are working with wet objects and a water solution specifically designed to  conduct electricity.

Your current is flowing negative to positive so no matter/material/metal is being taken from the barrel it is being deposited onto the barrel , you are basically electroplating the barrel with ferrous oxide(rust)

Offline Cheryl Watson

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Re: Flash Rust
« Reply #12 on: August 23, 2019, 12:09:22 AM »
Quote
Are there any of those stainless barrels left around that some folks were using years ago? [smiley=scratchchin.gif]

Yes, I have one of 'Perry's Barrels" that was purchased and then never used back when he had them for sale.

So I Perry re-purchased it for me, and shipped it my way.

It is one of my 'current' electros... :)
« Last Edit: August 23, 2019, 12:14:28 AM by lillyc »

Offline Cheryl Watson

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Re: Flash Rust
« Reply #13 on: August 23, 2019, 12:22:46 AM »
Quote
There should be no reason for a stainless steel drum to develop holes from being used as an electrolysis tank, The only concern I would have is possible electric shock as you are using the positive attached to the tank(drum) so you would have to be careful about what the negative comes in contact with especially since you are working with wet objects and a water solution specifically designed to  conduct electricity.

Your current is flowing negative to positive so no matter/material/metal is being taken from the barrel it is being deposited onto the barrel , you are basically electroplating the barrel with ferrous oxide(rust)


[size=12]Any anode (which is 'sacrificial') will degrade and eventually develop holes/breach spots, even Stainless Steel. The length of time for this to occur is much longer when using SS... and will vary depending on the 'type' and gauge (thickness) of the SS, and usage frequency.   It is still way longer lasting then regular steel, and don't ever use a galvanized trash can as an anode... it will breach quickly,,,, very quickly...

In the picture above, the entire top rim of my SS barrel is covered with a split length of clear vinyl tubing which allow me to lay my Negative conducting rod straight across the top... which also has lengths of clear vinyl tubing at the contact points (double insulation)... :) 

It is also sitting in a plastic (hot water heater) drain tray with overflow drain hose attached, just in case the side weld breaches first.  This also insulates the SS drum from the concrete floor which could conduct current, and zap little ole me. ;D [/size]
« Last Edit: August 23, 2019, 12:26:09 AM by lillyc »

Offline Lee Bowen

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Re: Flash Rust
« Reply #14 on: August 24, 2019, 11:34:40 AM »
Cheryl, your setup looks very efficient and do-able.  Thank you for assisting me with my other problem.  I appreciate everyone on this forum for the input and assistance.  :)

Offline Paul Ragghianti

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Re: Flash Rust
« Reply #15 on: August 31, 2019, 04:21:25 PM »
Back to the task at hand, I put this pan back in a new lye bath about two weeks ago. I was gonna look into an electro set up, but decided against it cause of time, & daughter off to collage.

Took it out today, cleaned with BarKeepers friend and HOT water.
It still bleeds crud on a white towel when wiping the piece down.
I've never run into this much crud before. Another trip to the vinegar is in order to knock some more rust down. The I think I'll season it without the intention of using till I get an electro set up.

Sounds weird but I think this pan was in a house fire. Slightly dished on one side of the pan, but not a spinner. Alot of hard burned on crust on the bottom.

Thanks again folks.

Paul

Offline Paul Ragghianti

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Re: Flash Rust
« Reply #16 on: August 31, 2019, 04:23:37 PM »
Here's a pic of the bottom.