March 29, 2024, 07:09:26 AM
Forum Rules: Read This Before Posting


Topic: Burning table salt with oil to repair nonstick cooking pan (PTFE)  (Read 1909 times)

0 Members and 1 Guest are viewing this topic.

Offline gatewood

  • Regular Member
  • ***
  • Posts: 39
  • Mole Snacks: +0/-0
I wish to know about a reaction between vegetable oil and table salt:

https://m.youtube.com/watch?v=1DENXNWGcKE

What the guu basically does is cover the pan with oil, sprinkle it with table salt and fire it. Ive done a similar procedure (lots of smoke! Do it outside) and the pan does indeed end up with a black lining, similar to the glazing in pottery.

So my question is this, what reaction is happening there? Is sodium chloride reacting and becoming something like sodium carbonate?

P.D: in my experiment, I used bigger grains of salt and ended up with very square (with perfect 90° edges) crystals, some even fractalized.
« Last Edit: June 11, 2019, 10:56:45 AM by Mitch »

Offline Enthalpy

  • Chemist
  • Sr. Member
  • *
  • Posts: 4041
  • Mole Snacks: +304/-59
Re: Burning table salt with oil
« Reply #1 on: June 10, 2019, 06:19:50 AM »
Maybe the salt corrodes the pan's aluminium, helping char to adhere.

It sounds like a very bad idea to me to destroy Ptfe by heat and then put food in contact with the pan. All fluorinated polymers produce badly toxic compounds by decomposition.

Oil too makes some toxic compounds by pyrolysis, like about any substance.

My recommendation is: don't do this.

Offline Mitch

  • General Chemist
  • Administrator
  • Sr. Member
  • *
  • Posts: 5298
  • Mole Snacks: +376/-3
  • Gender: Male
  • "I bring you peace." -Mr. Burns
    • Chemistry Blog
Re: Burning table salt with oil
« Reply #2 on: June 10, 2019, 12:58:30 PM »
I don't see how PTFE can be repaired by the procedures shown in that video without either creating something toxic or just corroding all the PTFE off the pan.
Most Common Suggestions I Make on the Forums.
1. Start by writing a balanced chemical equation.
2. Don't confuse thermodynamic stability with chemical reactivity.
3. Forum Supports LaTex

Offline Enthalpy

  • Chemist
  • Sr. Member
  • *
  • Posts: 4041
  • Mole Snacks: +304/-59
Re: Burning table salt with oil
« Reply #3 on: June 11, 2019, 05:49:31 AM »
The proposal is to replace (part of) the Ptfe by some oil char, said to be anti-adhesive too.

Destroying Ptfe by heat near living creatures is a bad idea, eating then from the pan is even worse.

Sponsored Links