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

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Old 09-30-2020, 07:27 PM
LVaughn LVaughn is offline
Join Date: Apr 2019
Posts: 21
Default Can Rust Form Under the Seasoning?

Occasionally I'll pull a pan out of the lye bath to find patches of rust that were not evident before. I have sometimes assumed that my lye was weak and allowed the iron to rust, but tonight I found it on a pan from my freshly renewed lye bath. Can the iron rust under the old seasoning and crud buildup? Or has someone seasoned over the rust?
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Old 10-02-2020, 12:31 PM
Doug D. Doug D. is offline
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Join Date: Mar 2012
Posts: 6,216
Default Re: Can Rust Form Under the Seasoning?

Even a weaker than normal lye solution shouldn't allow rust to form, pH would likely still be too high. I can't see someone purposely seasoning over rust. It might be possible, but unlikely that a crudded-over pan was left submerged in water long enough to do something like you're describing, but I've never seen it.
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Old 10-06-2020, 12:44 PM
Russell S. Russell S. is offline
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Join Date: Jun 2015
Posts: 262
Default Re: Can Rust Form Under the Seasoning?

After viewing YouTube, and Facebook Groups on Cast Iron, nothing surprises me anymore. Some folks just remove loose surface rust and season over the rest. I just pulled a #14 unmarked skillet (Iím pretty sure a Wagner) out of my lye bath that had rust and minor pitting under the seasoning. The pan was completely black on the surface and the rust and pitting wasnít noticeable at all before the lye soak. Itís in the E-tank now.
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Old 10-09-2020, 08:06 AM
LVaughn LVaughn is offline
Join Date: Apr 2019
Posts: 21
Default Re: Can Rust Form Under the Seasoning?

It happens just often enough to make me wonder what the heck is going on. Oh well.
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