METHOD FOR PICKLING STAINLESS STEEL

PROBLEM TO BE SOLVED: To provide a pickling method for effectively recycling sulfuric acid waste water used for etching and cleaning electronic parts, for a liquid for pickling stainless steel. SOLUTION: This method for pickling stainless steel employs the sulfuric acid waste water used for etching...

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Bibliographische Detailangaben
Hauptverfasser:	FURUSAWA HIDEYA, HIROTA AKIHITO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a pickling method for effectively recycling sulfuric acid waste water used for etching and cleaning electronic parts, for a liquid for pickling stainless steel. SOLUTION: This method for pickling stainless steel employs the sulfuric acid waste water used for etching and/or cleaning the electronic parts, which is adjusted so as to contain 390 g/l or more sulfuric acid, 50 mg/l or less each of Si, F and Cl, 1,000 mg/l or less H2O2, and 2.0 mg/l or less NH4, for the liquid for pickling the stainless steel. COPYRIGHT: (C)2004,JPO&NCIPI