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Cast Iron Cleaning and Seasoning Help With and Tips & Techniques For Cast Iron Cookware Restoration

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  #1  
Old 08-09-2020, 10:27 AM
WillB WillB is offline
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Default Removing “Exfoliated”, Hard Rust Buildup

Hi,

I’ve been trying to clean off the rust buildup on the bottom of a Dixie Foundry #8. I started the piece off with easy off which removed some of the carbon/seasoning buildup. Then I put it in an E tank which removed the rest of the seasoning. It doesn’t seem to have touched the rust buildup on the bottom though. This is hard rust/iron which will chip off if hit hard enough with a flat head screwdriver. It’s also hard to tell which is the “exfoliated” rust and which is the pitted bare iron. Any suggestions?

https://imgur.com/a/Rmzxij4

Last edited by WillB; 08-09-2020 at 10:29 AM. Reason: adding pics
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  #2  
Old 08-09-2020, 09:15 PM
Jay Reiter Jay Reiter is offline
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Default Re: Removing “Exfoliated”, Hard Rust Buildup

Something like that takes a wile in the e tank. What voltage and current are you indicating? I would say keep going and scrub the pot with a wire brush in the evening. The rust will come off little by little. I had problems like that and it took several days to a week. They were not that rusted.
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Old 08-09-2020, 10:15 PM
Doug D. Doug D. is offline
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Default Re: Removing “Exfoliated”, Hard Rust Buildup

This is some major sulfur putting. Metal has been dissolved and reformed by the sulfuric acid created by use over a sulfur containing heating fuel. It's not going to come off and reveal anything underneath. Electro should remove whatever rust is present among the pits, but that's about it. I wouldn't expect chiseling at it to result in anything positive. It can still be an acceptable user, just a rather homely one.
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Old 08-09-2020, 11:29 PM
WillB WillB is offline
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Default Re: Removing “Exfoliated”, Hard Rust Buildup

Not sure on the amperage. I have about 12 volts differential however (using a boat battery with an automatic charger).

I wasn’t planning on chipping at it anymore. That was just see how well the rust was adhered.

I’ll put it back in the e-tank and make sure my anodes are cleaned and closer to the piece than they were before.
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Old 08-10-2020, 04:33 PM
BryanB BryanB is offline
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Default Re: Removing “Exfoliated”, Hard Rust Buildup

How slick is the inside? Don't want pits meeting in the middle.
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  #6  
Old 08-10-2020, 05:12 PM
WillB WillB is offline
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Default Re: Removing “Exfoliated”, Hard Rust Buildup

That has crossed my mind... The inside has a slight low spot (warped) but it’s very smooth.
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