Why not just leave it alone?
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12 years ago
Why not just leave it alone?
Rust doesn't "soak in" to iron anymore than soup does. Whatever rust you see is on the surface. If you care about the appearance, get a knife not to use, as some people do with copper pans. Remove the rust with steel wool or (after wetting it with oil) with a razor-blade paint scraper. Then sharpen it. Cosmetic damage is the least that happens when a carbon steel knife is left wet. The first damage is to the edge. If you can't tell, it wasn't sharp to begin with.
Jerry
-- Engineering is the art of making what you want from things you can get.
So wrong! There are fluorine compounds in toothpaste, but not hydrofluoric acid. Usually sodium or potassium fluoride. Check the label.
HF isn't basically more dangerous than HCl. It's primary claim to fame its ability to attack glass. Don't confuse it with HCN.
Jerry
-- Engineering is the art of making what you want from things you can get.
Because HF shouldn't be part of ANY consumer product.
So wrong! There are fluorine compounds in toothpaste, but not hydrofluoric acid. Usually sodium or potassium fluoride. Check the label.
HF isn't basically more dangerous than HCl. It's primary claim to fame its ability to attack glass. Don't confuse it with HCN.
----------------------------------------------------------- It bloody well is more dangerous! Much more dangerous! I speak as one who has used it and managed a lab that used large quantities of it. Graham
That's wrong. HF is not nearly as strong an acid as HCl, but it is much more poisonous, and it will easily penetrate the skin without causing any apparent damage at first.
Wear rubber gloves and try not to spill the stuff on yourself and the 2% isn't all *that* bad. I keep a bottle handy and use the stuff; usually a drop at a time. Handle a rag sopped with the stuff for very long without wearing rubber or plastic gloves and you just might need you hand amputated -- or worse.
-Bob
Uh, you do know OP was talking about the stain on the rice cooker, right?
The good ones use tin fluoride. ;-)
F is certainly worse than Cl, in almost every way.
HF interferes with the body's calcium and potassium metabolism and can cause death by cardiac arrest.
No, I obviously didn't. "Soaking in" should have given me a clue.
Jerry
-- Engineering is the art of making what you want from things you can get.
From skin contact? I suppose I've been lucky, then. To clean nitric- acid stains off my hands, I would go to the plating shop, dunk my hands in the bright dip to be sure there were no cuts, then rinse them in the cyanide bath. Plenty of running water after than.
Jerry
-- Engineering is the art of making what you want from things you can get.
Isn't that how the Iceman killed his targets, spraying them with cyanide or just spilling it on them as he went by?
nancy
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