METHOD FOR PICKLING STAINLESS STEEL

PROBLEM TO BE SOLVED: To provide a technique utilizing a nitric acid waste solution, a hydrogen fluoride waste aqueous solution and a nitric-hydrofluoric acid waste solution used for etching and cleaning of electronic parts as a pickling solution for stainless steel. SOLUTION: In this method for pic...

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Bibliographische Detailangaben
Hauptverfasser:	UESUGI HIROYUKI, NONAKA IZUMI, AMANO SHINOBU, SUGINAKA TOMOHIRO, YUMITATE KOZO, FUJIWARA MASASHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING CLEANING IN GENERAL 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 PERFORMING OPERATIONS PREVENTION OF FOULING IN GENERAL TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a technique utilizing a nitric acid waste solution, a hydrogen fluoride waste aqueous solution and a nitric-hydrofluoric acid waste solution used for etching and cleaning of electronic parts as a pickling solution for stainless steel. SOLUTION: In this method for pickling stainless steel using a nitric acid waste solution and/or a hydrogen fluoride waste aqueous solution used for the etching and/or cleaning of electronic parts as a pickling solution for stainless steel, the pickling solution is controlled in such a manner that the concentration of nitric acid is regulated to >=50g/l and/or the concentration of hydrogen fluoride is regulated to >=10g/l, and also, the contents of Si, B, P and Cl are regulated to