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Topic: cleaning the weld places from black stains on steel  (Read 4201 times)

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Offline dionl

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cleaning the weld places from black stains on steel
« on: November 05, 2008, 05:31:43 AM »
Hi, I have a problem to find which chemicals usage can clean the weld places from black stains on steel? hydrofluoric acid, nitric acid in which ratios can be prepared or are these chemicals can be useful? thanks for your helps...
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Offline eugenedakin

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Re: cleaning the weld places from black stains on steel
« Reply #1 on: November 09, 2008, 08:37:22 PM »
Hi dionl,

The answer is ... maybe. What are the black stains from (sulphuric acid, Hydrogen sulphide, etc.)? Is metal thickness a concern, as acid will reduce the thickness. These chemicals can be useful, when applied appropriately.  :)

Sincerely,

Eugene
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