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"Are sulphuric, nitric and hydrophloric acids available in powder form?"



2005

We have stainless steel re-rolling units in Delhi(India). For picking of sheets we use solution of sulphuric+nirtric+HF+water in certain proportion. these chemicals are supplied to us in liquid form. I want to know if these chmicals are available in powder form and can these be used by simply adding to water?

SANTOSH AGGARWAL
STEEL - NEW DELHI, INDIA
^


2005

No, they are all liquids.

trevor crichton
Trevor Crichton
R&D practical scientist
Chesham, Bucks, UK
^


First of two simultaneous responses -- 2005

Not economically feaasable! You can substitute ammonium bi fluoride-a salt or crystal for the fluoride to avoid the extremely hazzardous HF. To reduce problems with the nitric and the sulfuric, buy it is lower strength (baumé) and use no or less water. Any acid in full strength and large quantities is a risk. This is offset by stringent enforcement of proper protective equipment and handling procedures.

James Watts
- Navarre, Florida
^


Second of two simultaneous responses -- 2005

Some mineral acids (i.e. boric) and many organic acids crystallize and can be acquired in powder form. But, no matter how concentrated, all of your mentioned acids are always liquid. You may want to investigate and learn more about acid salts which sometimes may be used instead of them.

Guillermo Marrufo
Monterrey, NL, Mexico
^


2005

Sulfuric acid is available as the acid salt sodium bisulfate. When dissolved in water becomes sulfuric acid. It is commonly used for all applications where sulfuric acid is selected. Use from 60 g/L to 120 g/L depending on the strength of sulfuric acid you need.

don baudrand
Don Baudrand
Consultant - Poulsbo, Washington
(Don is co-author of "Plating on Plastics" [affil link to the book on: Amazon or AbeBooks ])
^

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