1
Bernard Bousquet, Bernard Chetreff: Process for acid pickling of stainless steel products. Ugine Aciers de Chatillon et Gueugnon October 13, 1992: US05154774 (9 worldwide citation)


The invention relates to a process for pickling stainless steel products, in which a pickling bath is used having the initial composition:


2
Dominique Henriet: Process for the acid pickling of stainless steel products. Ugine Aciers de Chatillon et Gueugnon November 25, 1997: US05690748 (3 worldwide citation)


The invention relates to a process for pickling stainless steel products, in which the pickling bath used has as its initial composition, HF.gtoreq.10 g/l, dissolved ferric iron (Fe.sup.3+).gtoreq.15 g/l, and water=balance. During the pickling operation(s), the redox potential of the bath is monitor ...


3
Dario Negri, Paolo Bruno Giordani: Process for pickling stainless steel in the absence of nitric acid and in the presence of chloride ions. Henkel Kommanditgesellschaft auf Aktien, Acciai Speciali Terni S p A April 29, 2003: US06554908 (3 worldwide citation)


Process for pickling stainless steel carried out at a temperature of between 20° and 70° C., with the use of a pickling solution containing the following basic ingredients:


4
Negri Dario, Giordani Paolo Bruno: Process for pickling stainless steel in the absence of nitric acid and in the presence of chloride ions. Henkel Kgaa, Acciai Speciali Terni November 8, 2000: EP1050605-A2 (2 worldwide citation)


Process for pickling stainless steel carried out at a temperature of between 20 DEG and 70 DEG C, with the use of a pickling solution containing the following basic ingredients: H2SO4 (free acid) : 50 to 200 g/l HF (free acid) : 0 to 60 g/l F anion (total) : 5 to 150 g/l SO4 anion (total) : 50 to 35 ...


5
Wasserbauer Brigitta, Braun Edgar, Maresch Gerald Dipl Ing Dr: Process for pickling stainless steel. Andritz Patentverwaltung January 19, 2000: EP0972854-A2


A special steel pickling process, employing a hot aqueous hydrochloric acid solution, is new. A special steel pickling process uses an aqueous hydrochloric acid solution at >= 40 degrees C. Preferred Features: The solution contains one or more oxidizing agents selected from nitric acid, chlorine, hy ...


6
Descemond Maryse, Masson Michel, Willemin Pascal: Process for pickling stainless steel. Imphy June 16, 1999: EP0922787-A1


Stainless steel is pickled and decarurized in an iron (II) and iron (III) ion-containing acid solution containing added potassium permanganate. Stainless steel is pickled in an acid solution which contains Fe and Fe ions, potassium permanganate being used such that MnO4 ions are reduced in solution ...


7
Starcevic Jovan Dipl Ing Dr, Gamsriegler Dietfried: Process for pickling stainless steel. Andritz Patentverwaltung June 28, 2000: EP1013800-A2


Chemical and/or electrochemical pickling of high grade steel is carried out in an acidic liquid that contains no nitric acid. Consumed electrolyte solution from electrochemical neutral salt pickling lines, preferably sodium sulphate pickling lines, is added.


8
Descemond Maryse, Masson Michel, Willemin Pascal: Process for pickling stainless steel. Imphy June 11, 1999: FR2772050-A1


Stainless steel is pickled and decarurized in an iron (II) and iron (III) ion-containing acid solution containing added potassium permanganate. Stainless steel is pickled in an acid solution which contains Fe and Fe ions, potassium permanganate being used such that MnO4 ions are reduced in solution ...


9
Maresch Gerald Dr Dipl Ing, Mahr Erich: Process for pickling stainless steel.. Andritz Patentverwaltung February 19, 1992: EP0471662-A2


Verfahren zum Beizen von Edelstahl, vorzugsweise von Edelstahl-Warmband, bei welchem der Edelstahl einer Beize mit Neutralelektrolyt, sowie einer Nachbehandlung mit Mischsäure, Salpetersäure oder einer Mischung von Eisenfluorid und Flusssäure unterzogen wird, wobei der Beize mit Neutralelektrolyt ei ...


10
Wasserbauer Brigitta, Braun Edgar, Maresch Gerald: Process for pickling stainless steel. Andritz Patentverwaltungs Gesellschaft Mbh February 1, 2002: TW475008


The invention refers to a process for pickling stainless steel, characterised by the stainless steel being treated in an aqueous hydrochloric acid solution at temperatures of at least 40 DEG C.



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