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Author Topic: Why is vinegar such a good rust remover?  (Read 161001 times)

Offline ukmicky

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Why is vinegar such a good rust remover?
« on: 07/07/2008 22:02:31 »
One of the best rust removers is vinegar it will remove the rust and leave gleaming metal behind but why is vinegar such a good rust removing product ,what chemical process does it use to remove it

Example
http://www.cookhaus.co.uk/vinegar/index.htm
« Last Edit: 08/07/2008 14:04:58 by BenV »


 

Offline Soul Surfer

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Re: Why is vinegar such a good rust remover?
« Reply #1 on: 07/07/2008 23:50:25 »
Weak acids can dissolve and loosen the crumbly hydrated iron oxide (which is what rust is) to form a soluble salt they can also replace it with a thin film of smooth hard oxide on the surface of the iron to help it resist further hydrated oxidation.  Phosphoric acid (coca cola) , and citric acid (lemon juice) are other acidic rust removers.
 

Offline lightarrow

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Re: Why is vinegar such a good rust remover?
« Reply #2 on: 08/07/2008 14:03:59 »
One of the best rust removers is vinegar it will remove the rust and leave gleaming metal behind but why is vinegar such a good rust removing product ,what chemical process does it use to remove it

Example
http://www.cookhaus.co.uk/vinegar/index.htm
Vinegar contains acetic acid CH3COOH which reacts with rust FeOOH:

3CH3COOH + FeOOH --> Fe(CH3COO)3 + 2H2O

and iron (III) acetate Fe(CH3COO)3 is water soluble.
 

Offline Karen W.

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Why is vinegar such a good rust remover?
« Reply #3 on: 08/07/2008 14:52:25 »
I love this method with old rusty tools me kids and hubby have left in the yard for a year with extreme rust a good soak and voila! Yayyyyyyyyy!.. Thanks for the answers guys and the Question Michael!.. Its always been my favorite way to remove rust!

Why does the vinegar turn the rust that floats to the surface Black and it gets smeary ... almost grease like when trying to wash it off from the tool and the hand... what causes that?
 

Offline LeeE

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Why is vinegar such a good rust remover?
« Reply #4 on: 08/07/2008 21:10:45 »
If what you're trying to clean is too big to immerse in vinegar, try using ketchup.
 

Offline Karen W.

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Why is vinegar such a good rust remover?
« Reply #5 on: 08/07/2008 21:35:55 »
You mean spread it on??? I have seen ketchup take on that same acidic black gunk when spilled on things!
 

Offline LeeE

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Why is vinegar such a good rust remover?
« Reply #6 on: 08/07/2008 22:33:48 »
Yup - spread it on ;D

In addition to vinegar, I think it also contains some other fruit based acids, so works in the same way.
 

Offline lightarrow

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Why is vinegar such a good rust remover?
« Reply #7 on: 08/07/2008 22:55:42 »
Yup - spread it on ;D

In addition to vinegar, I think it also contains some other fruit based acids, so works in the same way.

If then you add mayonnaise, it's even better  ;D ;D
(it contains citric acid and vinegar)
 

Offline LeeE

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Why is vinegar such a good rust remover?
« Reply #8 on: 08/07/2008 23:10:34 »
Heh - never tried mayonnaise.  I guess salad cream would work too.

Ketchup is also good for cleaning the bottoms of burnt saucepans, especially those copper-bottomed ones - I learned that from my parents who noticed it by chance - one of them accidentally spilled some ketchup on a stained saucepan which had been washed and was draining dry but they didn't wipe it off until they'd finished eating...
 

Offline neilep

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Why is vinegar such a good rust remover?
« Reply #9 on: 09/07/2008 00:48:25 »
Does this mean that a frozen crinkled (soaked in vinegar) chip will make a good scouring brush and boot cleaner ?
 

Offline Karen W.

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Why is vinegar such a good rust remover?
« Reply #10 on: 09/07/2008 01:36:44 »
Hee hee hee?
 

Offline Karen W.

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Why is vinegar such a good rust remover?
« Reply #11 on: 09/07/2008 01:40:19 »
Yup - spread it on ;D

In addition to vinegar, I think it also contains some other fruit based acids, so works in the same way.

Yes I should have thought..  I know how acidy Ketchup is because of the tomatoes but the ketchup I forgot contains vinegar also...! LOL...

The goat should be happy eh.. ketchup mayonnaise and a nice copper pot! LOL Bon-appetite!

If then you add mayonnaise, it's even better  ;D ;D
(it contains citric acid and vinegar)
 

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Why is vinegar such a good rust remover?
« Reply #11 on: 09/07/2008 01:40:19 »

 

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