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Israel
Associate

Join Date: Sep 2007
Location: Mexico
Posts: 42

Reaction Mixing HCL with Steel A516 GRADE70

10/08/2007 3:35 PM

Hi.

If I wanna do descaling with HCL 10-12%, what kind of gas can generate the reaction with steel A516 GRADE 70?

Israel Barron

Steel fab de Mexico.

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 Israel Barron ibarron@sfmex.com
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Milo
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Join Date: Jul 2006
Location: "Dancing over the abyss."
Posts: 4884
Good Answers: 243
#1

Re: Reaction Mixing HCL with Steel A516 GRADE70

10/08/2007 11:44 PM

Hydrogen gas will be liberated by the pickling.

The concentration of Fe in the bath will be the limiting factor more so than the acid strength.

It is the evolution of Hydrogen gas bubbles that lifts the scale.

you will need to use a commercial inhibitor and neutralize the acid on the material, typically that is done with a lime water bath

milo

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 People say between two opposed opinions the truth lies in the middle. Not at all! Between them lies the problem, what is unseeable,eternally active life, contemplated in repose. Goethe
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