Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...
Patent
1998-04-29
1999-09-28
Warden, Jill
Cleaning and liquid contact with solids
Processes
For metallic, siliceous, or calcareous basework, including...
156666, 216108, 510109, C23G 102, C23F 100, C09K 1300, C11D 302
Patent
active
059581476
ABSTRACT:
The invention relates to a method of pickling or surface treating a metal in an aqueous solution containing nitric acid wherein hydrogen peroxide is supplied to decrease the formation of nitrous fumes. At least a portion of the hydrogen peroxide is supplied by spraying or flushing an aqueous solution thereof directly on the metal through one or several separate nozzles (18a, 18b, 19a, 19b).
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Berglind Troy
Frestad Arne
Akzo Nobel N.V.
Warden Jill
Wilkins Yolanda E.
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