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I have a piece of wrought iron that I’ve finally found a project worthy of. 

I want to etch the wrought to show off the grain. Any experience with etching wrought?

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I've never needed to etch wrought iron, but I've read that Sodium Bi-sulfate, the same chemical used for swimming pools, is a very aggressive etchant.

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Even plain vinegar will work. No matter what you use, make sure you neutralize the acid when done

 

 

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Would tap water with baking soda work as a neutralizing agent?

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Mr. Mtbarn,

Sodium bisulfate is acidic so a base chemical will neutralize it.

So baking soda will work.

SLAG.

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yes, on baking soda

another easy to obtain acid is muriatic acid. most hardware stores have it. Its used for many things and may be Mr Slags Sodium bisulfate.

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Note that the grade of refinement makes a big deal on how etched WI looks.

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Muriatic acid is a name for diluted hydrochloric acid (HCl).  It comes in various concentrations such as 14%, 29%, and 31%. Sodium bisulfate is NaHSO4 and is made by the partial neutralization of sulfuric acid (H2SO4).

"By hammer and hand all arts do stand."

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thanks, George. Good info. I should of picked up on that. I'm not familiar with sodium bisulfate. I have used sulfuric acid and a few dilutions of hydrochloric acid.

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