EP0792949B1 - Procédé de décapage d'une pièce en acier et notamment d'une bande de tôle en acier inoxydable - Google Patents
Procédé de décapage d'une pièce en acier et notamment d'une bande de tôle en acier inoxydable Download PDFInfo
- Publication number
- EP0792949B1 EP0792949B1 EP97400433A EP97400433A EP0792949B1 EP 0792949 B1 EP0792949 B1 EP 0792949B1 EP 97400433 A EP97400433 A EP 97400433A EP 97400433 A EP97400433 A EP 97400433A EP 0792949 B1 EP0792949 B1 EP 0792949B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pickling
- solution
- strip
- stainless steel
- hydrochloric acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005554 pickling Methods 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 19
- 239000010935 stainless steel Substances 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 title abstract description 19
- 239000010959 steel Substances 0.000 title abstract description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910021607 Silver chloride Inorganic materials 0.000 claims abstract description 11
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims abstract description 11
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims abstract description 8
- 238000006213 oxygenation reaction Methods 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000005273 aeration Methods 0.000 claims abstract description 4
- 238000000137 annealing Methods 0.000 claims abstract description 4
- -1 Fe(II) ions Chemical class 0.000 claims abstract 6
- 239000000243 solution Substances 0.000 claims description 86
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 45
- 229910052742 iron Inorganic materials 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 9
- 238000010405 reoxidation reaction Methods 0.000 claims description 8
- 229910001447 ferric ion Inorganic materials 0.000 claims description 6
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000010924 continuous production Methods 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 239000012286 potassium permanganate Substances 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 3
- 238000005097 cold rolling Methods 0.000 claims description 3
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 150000002978 peroxides Chemical class 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 230000005587 bubbling Effects 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000013019 agitation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 239000002253 acid Substances 0.000 description 15
- 150000002500 ions Chemical class 0.000 description 14
- 238000012360 testing method Methods 0.000 description 8
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 7
- 238000009434 installation Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 241001080024 Telles Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/086—Iron or steel solutions containing HF
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
- B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
- B21B1/36—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by cold-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/228—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length skin pass rolling or temper rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0071—Levelling the rolled product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
Definitions
- the invention relates to a method of pickling a steel part and in particular a strip of steel sheet stainless.
- pickling baths based on hydrochloric acid generate corrosion of steel of the pitting type.
- a pickling bath for stainless steel wherein the hot-rolled or annealed are pickled in a sulfuric acid solution containing Fe 3+ and Fe ions 2+ , said solution containing at least 10 g / liter of iron, pickling being carried out by aerating the solution with blown air at a flow rate of at least 100 ml / min and per liter of solution.
- air blowing has the sole function of stirring the solution because it is well known that in a sulfuric medium the oxidation potential of iron is such that a simple stirring in air does can oxidize iron Fe 2+ to Fe 3+ .
- the object of the invention is to propose a method of pickling which ensures, in a very short time, pickling a steel part and in particular a steel strip stainless, the pickling time being compatible with the durations imposed on a production line of the piece or strip of sheet metal.
- the subject of the invention is a process for pickling a piece of stainless steel and in particular a strip of stainless steel sheet, consisting in applying an aqueous pickling solution consisting of hydrochloric acid and ferric and ferrous ions of pickling in solution having a hydrochloric acid concentration between 35 and 250 g / l and a total iron concentration between 30 and 250 g / l, at a temperature between 65 ° C and 85 ° C, and in order to preserve constant etching power of the aqueous hydrochloric acid solution having a pH of less than 1, to maintain the concentration of Fe 3+ ions at a value between 1 g / liter and 300 g / liter, by reoxidation using a oxygenation of Fe 2+ ions generated during pickling, the REDOX potential being maintained at a value between 400 and 600 mV potential measured between a platinum electrode and an Ag / AgCl reference electrode placed in the solution, te mps of application of the solution on the stainless steel part being less than
- the invention also relates to the use of the pickling process according to the invention in the field of accelerated stripping of a steel part and in particular of a stainless steel strip on an installation of on-line, continuous production of the steel strip as defined in claim 6.
- pickling baths based on hydrochloric acid are considered to generate corrosion of the surface of pickled parts, this corrosion being of the type by sting.
- Non-polluting pickling processes use, preferably, solutions comprising alone or in combination, in different concentrations, acids sulfuric and hydrofluoric.
- the pickling tests were made with a single acid so as to avoid formation of insoluble complex compounds, the solution being intended to be recycled, that is to say reused pickling.
- pickling solutions have been tested in pickling efficiency, taking into account their maximum efficiency by adjusting the REDOX potential corresponding to different acid concentrations used.
- the residence time is adapted to the composition steel and the type of oxide to be etched.
- the REDOX potential is fixed at 460 mV compared to an Ag / AgCl reference electrode, the potential being kept constant by air injection and additional supply of hydrogen peroxide.
- Table 1 below presents the different pickling speeds measured in loss of material in grams per square meter and per second for different grades of steel: Steel Solution A Solution B Solution C The invention AISI 304 0.41; 0.37 0.42; 0.37 0.59 0.28; 0.27 0.31; 0.27 0.63-0.56 AISI 316L 0.31 0.40 0.53 AISI 430 0.46 - 0.46 0.92; 0.90 1.6 - 1.1 AISI 430 Ti 0.65 - 0.67 1.01; 0.99 1.5 - 1.8 AISI 409 0.55 - 0.58 0.93; 0.96 1.3 - 1.6
- the surface of the strip stripped with a hydrochloric solution has a white appearance, without puncture, while the surface of the strip stripped with a aqueous sulfuric acid solution looks blackish.
- Measuring REDOX potential is one way to quality control of pickling solution in an industrial installation, for optimization of pickling speed and quality maintenance constant at constant pickling efficiency.
- Pickling speed can increase from 30% to 50% when the REDOX potential is increased from 400 mV to 600 mV.
- the pickling speed can be adjusted by adding in the hydrochloric acid bath according to the invention a amount of another acid such as acid hydrofluoric in a proportion less than 40 g / liter.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Chemical Treatment Of Metals (AREA)
Description
Il est également connu, par exemple du brevet JP H2-205692, un bain de décapage des aciers inoxydables dans lequel des produits laminés à chaud ou soumis à un recuit sont décapés dans une solution d'acide sulfurique contenant des ions Fe3+ et Fe2+, ladite solution contenant au moins 10 g/litre de fer, le décapage étant effectué en aérant la solution par de l'air insufflé à un débit d'au moins 100 ml/mn et par litre de solution.
- un traitement mécanique, par exemple de planage sous traction et/ou grenaillage,
- un décapage primaire,
- une opération de transformation comme par exemple de laminage,
- des opérations de recuit,
- un décapage final,
- une opération de finition comme par exemple un laminage à froid de type " skin pass".
- la réoxydation des ions Fe2+ par oxygénation est réalisée par aération de la solution décapante,
- l'aération de la solution décapante est réalisée par des moyens choisis parmi : pompage et refoulement de la solution à l'air libre, bullage, brassage, injection d'un gaz contenant l'élément oxygène, aspersion de la solution décapante dans une enceinte contenant de l'air,
- la réoxydation est complétée par addition de composés choisis parmi : les peroxydes et/ou les persels et de préférence le peroxyde d'hydrogène (H2O2) et/ou le permanganate de potassium (KMnO4),
- on chauffe la pièce à traiter préalablement à l'application de la solution,
- on ajuste le potentiel REDOX entre 400 mV et 600 mV, par apport d'un composé et/ou d'un gaz oxydant.
- un traitement mécanique, par exemple de planage sous traction et/ou grenaillage,
- un décapage primaire,
- une opération de transformation comme par exemple de laminage,
- des opérations de recuit,
- un décapage final,
- une opération de finition comme par exemple un laminage à froid de type "skin pass", l'un au moins des décapages consistant à appliquer une solution aqueuse de décapage constituée d'acide chlorhydrique.et d'ions ferriques et ferreux de décapage en solution présentant une concentration en acide chlorhydrique comprise entre 35 et 250 g/l et une concentration de fer total comprise entre 30 et 250 g/l, à une température comprise entre 65°C et 85°c, et en vue de conserver un pouvoir décapant constant de la solution aqueuse d'acide chlorhydrique ayant un pH inférieur à 1, à maintenir la concentration en ions Fe3+, à une valeur comprise entre 1 g/litre et 300 g/litre, par réoxydation au moyen d'une oxygénation des ions Fe2+ générés lors du décapage, le potentiel REDOX étant maintenu à une valeur comprise entre 400 et 600 mV, potentiel mesuré entre une électrode de platine et une électrode de référence Ag/AgCl placées dans la solution le temps d'application de la solution sur la pièce en acier inoxydable étant inférieur à 2 mn.
- une solution décapante A aqueuse d'acide sulfurique de normalité 4 N, correspondant à une concentration de 196 g/litre d'acide et contenant 60 g/litre de fer total.
- une solution décapante B aqueuse d'acide fluorhydrique de normalité 4N, correspondant à une concentration de 80 g/litre d'acide et contenant 60 g/litre de fer total.
- une solution décapante C aqueuse d'acide chlorhydrique de normalité 4N correspondant à une concentration de 146 g/litre d'acide et contenant 60 g/litre de fer total.
| Acier | Solution A | Solution B | Solution C |
| L'invention | |||
| AISI 304 | 0,41; 0,37 | 0,42; 0,37 | 0,59 |
| 0,28; 0,27 | 0,31; 0,27 | 0,63-0,56 | |
| AISI 316L | 0,31 | 0,40 | 0,53 |
| AISI 430 | 0,46 - 0,46 | 0,92; 0,90 | 1,6 - 1,1 |
| AISI 430 Ti | 0,65 - 0,67 | 1,01; 0,99 | 1,5 - 1,8 |
| AISI 409 | 0,55 - 0,58 | 0,93; 0,96 | 1,3 - 1,6 |
- Variation de la concentration en acide chlorhydrique: Des essais de décapage ont été effectués avec des solutions décapantes C aqueuses d'acide chlorhydrique de normalité comprise entre 3N et 5N correspondant à une concentration comprise entre 108 g/litre et 180 g/litre d'acide et contenant 60 g/litre de fer total.Dans ces essais de décapage, le potentiel REDOX est fixé à 460 mV par rapport à une électrode de référence Ag/AgCl, le potentiel étant maintenu constant par injection d'air et apport complémentaire de peroxyde d'hydrogène, la température de la solution étant maintenue à 80°C.Dans ces conditions, la vitesse de décapage augmente avec la concentration en acide et peut atteindre des valeurs jusqu'à deux à trois fois supérieures à ce qu'elles sont avec les bains de référence A ou B.Pour parvenir à une telle efficacité de décapage, on contrôle le potentiel d'oxydo réduction du bain selon l'invention, contrôle effectué par addition notamment de peroxyde d'hydrogène en complément d'injection d'air, ce qui permet de garder un haut niveau d'agressivité et de traiter en continu, notamment sur une ligne de laminage, les bandes de tôle sur lesquelles est appliquée la solution.
- Variation de la concentration en fer total : Des essais de décapage ont été effectués avec des solutions décapantes C aqueuses d'acide chlorhydrique de normalité 4N correspondant à une concentration de 146 g/litre d'acide et contenant de 30 g/litre à 250 g/litre de fer total.Avec une concentration en fer d'environ 250 g/litre, le fer est en limite de solubilité dans la solution d'acide.Dans ces essais de décapage avec la solution chlorhydrique, le potentiel REDOX est fixé à 460 mV par rapport à une électrode de référence Ag/AgCl, le potentiel étant maintenu constant par injection d'air et apport complémentaire de peroxyde d'hydrogène, la température de la solution étant maintenue à 80°C.Dans ces conditions, la vitesse de décapage augmente avec la concentration en fer et atteint des valeurs jusqu'à trois fois supérieures à ce qu'elles sont avec les bains classiques A ou B.
- Variation de la température: Les températures de la solution de décapage peuvent varier de 10°C à 95°C et varient de préférence entre 65 °C et 85 °C. La vitesse de décapage croit avec la température. Au-dessous de 70°C, la vitesse de décapage croit modérément avec la température, lorsque la température atteint de 70°C à 85°C, la vitesse de décapage augmente de près de 20%. Bien qu'au-dessus d'une certaine température, il peut se produire une évaporation non négligeable, on peut envisager dans une installation, une enceinte fermée, qui permet l'utilisation de la solution à une température supérieure à 85°C, associée à un dispositif de condensation de la solution pour un retour en utilisation.Pour mettre à profit l'effet de la température, il est possible de chauffer la pièce ou la bande de tôle pour compenser les effets d'inertie thermique.
- Variation du potentiel REDOX:
Claims (7)
- Procédé de décapage d'une pièce en acier inoxydable et notamment une bande de tôle en acier inoxydable, consistant à appliquer une solution aqueuse de décapage constituée d'acide chlorhydrique et d'ions ferriques et ferreux de décapage en solution présentant une concentration en acide chlorhydrique comprise entre 35 et 250 g/l et une concentration de fer total comprise entre 30 et 250 g/l, à une température comprise entre 65°C et 85°C, et en vue de conserver un pouvoir décapant constant dans la solution aqueuse d'acide chlorhydrique ayant un pH inférieur à 1, à maintenir la concentration en ions Fe3+, à une valeur comprise entre 1 g/litre et 300 g/litre, par réoxydation au moyen d'une oxygénation des ions Fe2+ générés lors du décapage, le potentiel REDOX étant maintenu à une valeur comprise entre 400 et 600 mV potentiel mesuré entre une électrode de platine et une électrode de référence Ag/AgCl placées dans la solution,le temps d'application de la solution sur la pièce en acier inoxydable étant inférieur à 2 mn.
- Procédé de décapage selon la revendication 1, caractérisé en ce que la réoxydation des ions Fe2+ par oxygénation est réalisée par aération de la solution décapante.
- Procédé selon l'une quelconque des revendications 1 et 2, caractérisé en ce que l'aération de la solution décapante est réalisée par des moyens choisis parmi : pompage et refoulement de la solution à l'air libre, bullage, brassage, injection d'un gaz contenant l'élément oxygène, aspersion de la solution décapante dans une enceinte contenant de l'air.
- Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la réoxydation est complétée par addition de composés choisis parmi : les peroxydes, les persels, et de préférence le peroxyde d'hydrogène H202, le permanganate de potassium KMnO4.
- Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'on chauffe la pièce à traiter préalablement à l'application de la solution.
- Utilisation du procédé de décapage selon l'une quelconque des revendications 1 à 5, dans le domaine du décapage accéléré d'une pièce et notamment d'une bande en acier inoxydable, sur une installation de production en ligne en continu de la bande.
- Ligne de production, en continu, d'une bande de tôle laminée en acier inoxydable utilisant le procédé de décapage selon l'une quelconque des revendications 1 à 6, dans laquelle les opérations suivantes sont mises en place, la bande est soumise successivement à :l'un au moins des décapages consistant à appliquer une solution aqueuse de décapage constituée d'acide chlorhydrique et d'ions ferriques et ferreux de décapage en solution, présentant une concentration en acide chlorhydrique comprise entre 35 et 250 g/l et une concentration de fer total comprise entre 30 et 250 g/l, à une température comprise entre 65°C et 85°C, et, en vue de conserver un pouvoir décapant constant de la solution aqueuse d'acide chlorhydrique ayant un pH inférieur à 1, à maintenir la concentration en ions Fe3+, à une valeur comprise entre 1 g/litre et 300 g/litre, par réoxydation au moyen d'une oxygénation des ions Fe2+ générés lors du décapage, le potentiel REDOX étant maintenu à une valeur comprise entre 400 et 600 mV, potentiel mesuré entre une électrode de platine et une électrode de référence Ag/AgCl placées dans la solution, le temps d'application de la solution sur la bande étant inférieur à 2 mn.un traitement mécanique, par exemple de planage sous traction et/ou de grenaillage,un décapage primaire,une opération de transformation comme par exemple de laminage,des opérations de recuit,un décapage finalune opération de finition comme par exemple un laminage à froid de type «skin pass»,
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9602405 | 1996-02-27 | ||
| FR9602405A FR2745301B1 (fr) | 1996-02-27 | 1996-02-27 | Procede de decapage d'une piece en acier et notamment d'une bande de tole en acier inoxydable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0792949A1 EP0792949A1 (fr) | 1997-09-03 |
| EP0792949B1 true EP0792949B1 (fr) | 2001-05-09 |
Family
ID=9489609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97400433A Expired - Lifetime EP0792949B1 (fr) | 1996-02-27 | 1997-02-26 | Procédé de décapage d'une pièce en acier et notamment d'une bande de tôle en acier inoxydable |
Country Status (14)
| Country | Link |
|---|---|
| US (2) | US5851304A (fr) |
| EP (1) | EP0792949B1 (fr) |
| JP (1) | JP4186131B2 (fr) |
| KR (1) | KR100448972B1 (fr) |
| CN (1) | CN1084801C (fr) |
| AT (1) | ATE201057T1 (fr) |
| AU (1) | AU711782B2 (fr) |
| BR (1) | BR9701076A (fr) |
| CA (1) | CA2198631C (fr) |
| DE (1) | DE69704732T2 (fr) |
| ES (1) | ES2156344T3 (fr) |
| FR (1) | FR2745301B1 (fr) |
| TW (1) | TW517099B (fr) |
| ZA (1) | ZA971647B (fr) |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1297076B1 (it) * | 1997-11-24 | 1999-08-03 | Acciai Speciali Terni Spa | Metodo per il decapaggio di prodotti in acciaio |
| DE19755350A1 (de) * | 1997-12-12 | 1999-06-17 | Henkel Kgaa | Verfahren zum Beizen und Passivieren von Edelstahl |
| GB9807286D0 (en) | 1998-04-06 | 1998-06-03 | Solvay Interox Ltd | Pickling process |
| AT407755B (de) * | 1998-07-15 | 2001-06-25 | Andritz Patentverwaltung | Verfahren zum beizen von edelstahl |
| AT406486B (de) * | 1998-12-22 | 2000-05-25 | Andritz Patentverwaltung | Verfahren zum beizen von edelstahl |
| FR2807957B1 (fr) * | 2000-04-21 | 2002-08-02 | Vai Clecim | Procede et installation de laminage a froid |
| ES2272699T3 (es) | 2001-04-09 | 2007-05-01 | Ak Steel Properties, Inc. | Tecnica de decapado con peroxido de hidrogeno para aceros inoxidables. |
| BR0208748B1 (pt) | 2001-04-09 | 2012-08-21 | processo para decapar tira de aço elétrico de modo contìnuo. | |
| WO2002081380A1 (fr) * | 2001-04-09 | 2002-10-17 | Ak Properties, Inc. | Appareil et procede d'elimination du peroxyde d'hydrogene d'une liqueur de decapage residuaire |
| DE10160318A1 (de) * | 2001-12-07 | 2003-06-18 | Henkel Kgaa | Verfahren zum Beizen von martensitischem oder ferritischem Edelstahl |
| KR100777171B1 (ko) * | 2002-10-15 | 2007-11-16 | 헨켈 코만디트게젤샤프트 아우프 악티엔 | 강 및 스테인레스강을 위한 산세 또는 광택/부동태화 용액및 방법 |
| US7306354B2 (en) * | 2003-11-28 | 2007-12-11 | Ed Haas | Light housing and system for providing a glittering light effect |
| FR2867991B1 (fr) * | 2004-03-25 | 2007-05-04 | Ugine Et Alz France Sa | Bandes en acier inoxydable austenitique d'aspect de surface mat |
| EP1980650A1 (fr) * | 2007-04-05 | 2008-10-15 | Kerma S.A. | Composition de décapage exempte de nitrates et de peroxydes, et procédé mettant en oeuvre une telle composition |
| SI2352861T1 (sl) * | 2008-11-14 | 2018-09-28 | Ak Steel Properties, Inc., | Postopek za luženje elektrojekla, vsebujočega silicij, s kislo lužilno raztopino, ki vsebuje železove(III) ione |
| JP2012180562A (ja) * | 2011-03-01 | 2012-09-20 | Yushiro Chemical Industry Co Ltd | さび除去剤水溶液 |
| CN102206829A (zh) * | 2011-04-23 | 2011-10-05 | 西部钛业有限责任公司 | 一种去除钛管材及钛合金管材表面包覆层的方法 |
| US8859479B2 (en) * | 2011-08-26 | 2014-10-14 | United Technologies Corporation | Chemical stripping composition and method |
| CN102337548B (zh) * | 2011-09-14 | 2012-12-05 | 西部钛业有限责任公司 | 一种钛、锆材的无酸雾酸洗方法 |
| DE102012004907A1 (de) | 2012-03-02 | 2013-09-05 | Sms Siemag Ag | Verfahren zum Beizen von Standard Stählen |
| CN102877080A (zh) * | 2012-09-26 | 2013-01-16 | 中冶南方工程技术有限公司 | 一种热轧不锈钢带钢混酸酸洗循环系统及方法 |
| ITMI20130494A1 (it) | 2013-03-29 | 2014-09-30 | Tenova Spa | Metodo per trattare in continuo la superficie di un laminato di acciaio inossidabile in una soluzione a base di acido cloridrico |
| KR101461815B1 (ko) * | 2013-07-31 | 2014-11-13 | 주식회사 포스코 | 고크롬 페라이트계 스테인리스강의 산세 방법 |
| US11028322B2 (en) * | 2015-12-18 | 2021-06-08 | Posco | Composition for washing pickled steel plate, method for washing pickled steel plate by using same, and steel plate obtained thereby |
| KR102179303B1 (ko) * | 2018-10-25 | 2020-11-16 | 주식회사 포스코 | 저크롬 페라이트계 스테인리스 열연강판의 스케일 제거 장치 및 그 방법 |
| US12139797B2 (en) | 2019-03-22 | 2024-11-12 | Primetals Technologies Japan, Ltd. | Acid solution preparation device, acid solution supply apparatus, and pickling facility |
| EP3951014B1 (fr) | 2020-01-09 | 2024-05-22 | Primetals Technologies Japan, Ltd. | Procédé de décapage de tôle d'acier et appareil de décapage |
| IT202000005848A1 (it) | 2020-03-19 | 2021-09-19 | Tenova Spa | Processo per decapare e/o passivare un acciaio inossidabile. |
| CN113584493B (zh) * | 2021-07-23 | 2023-02-28 | 中冶南方工程技术有限公司 | 一种冷轧不锈钢退火酸洗工艺及酸洗设备 |
| CN119585469A (zh) * | 2022-09-21 | 2025-03-07 | 普锐特冶金技术日本有限公司 | 浓度检测方法和浓度检测装置 |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR501867A (fr) * | 1919-07-16 | 1920-04-28 | Jacques Gustave Schulz | Véhicules-automobiles à mécanisme moteur indépendant |
| US3310435A (en) * | 1963-11-18 | 1967-03-21 | Dravo Corp | Process for continuous pickling of steel strip and regeneration of the contact acid |
| US3445284A (en) * | 1963-11-18 | 1969-05-20 | Dravo Corp | Process for pickling of steel strip and regeneration of the contact acid |
| US3385734A (en) * | 1964-12-02 | 1968-05-28 | Pennsylvania Ind Chemical Corp | Process and composition for pickling steel |
| US3423240A (en) * | 1965-08-19 | 1969-01-21 | Ford Motor Co | Pickling process |
| JPS5047826A (fr) * | 1973-08-31 | 1975-04-28 | ||
| JPS549120A (en) * | 1977-06-24 | 1979-01-23 | Tokai Electro Chemical Co | Method of controlling acid cleaning liquid for stainless steel |
| FR2399488A1 (fr) * | 1977-08-01 | 1979-03-02 | Beugin Sa Expl Procedes | Procede de decapage chimique des aciers |
| JPS55138081A (en) * | 1979-04-11 | 1980-10-28 | Shinko Kosen Kogyo Kk | Descaling method for steel or stainless steel |
| US4323240A (en) * | 1980-08-20 | 1982-04-06 | Stewart Charles G | Bowling game |
| JPS5871336A (ja) * | 1981-10-21 | 1983-04-28 | Nisshin Steel Co Ltd | 疲労特性に優れた高強度オ−ステナイト系ステンレス鋼板の製造方法 |
| JPS5839234B2 (ja) * | 1981-10-26 | 1983-08-29 | 住友金属工業株式会社 | 鋼線材の酸洗脱スケ−ル方法 |
| FR2551465B3 (fr) * | 1983-09-02 | 1985-08-23 | Gueugnon Sa Forges | Procede de decapage acide des aciers inoxydables et solution acide pour sa mise en oeuvre |
| ATE121804T1 (de) * | 1985-01-22 | 1995-05-15 | Ugine Sa | Verfahren zum säuren beizen von stahlen, insbesondere von rostfreien stahlen. |
| FR2587369B1 (fr) * | 1985-09-19 | 1993-01-29 | Ugine Gueugnon Sa | Procede de decapage acide de produits en acier inoxydable |
| JPS63216986A (ja) * | 1987-03-03 | 1988-09-09 | Sumitomo Metal Ind Ltd | 低Cr鋼の高速酸洗方法 |
| DE3719604A1 (de) * | 1987-06-12 | 1988-12-22 | Markus Maria Dipl In Bringmann | Beizen von halbzeugen |
| JPH02205692A (ja) * | 1989-02-04 | 1990-08-15 | Nippon Steel Corp | ステンレス鋼の酸洗方法およびその設備 |
| FR2657888B1 (fr) * | 1990-02-08 | 1994-04-15 | Ugine Aciers | Procedes de decapage de materiaux en acier inoxydable. |
| FR2673200A1 (fr) * | 1991-02-25 | 1992-08-28 | Ugine Aciers | Procede de surdecapage de materiaux en acier tels que les aciers inoxydables et les aciers allies. |
| IT1245594B (it) * | 1991-03-29 | 1994-09-29 | Itb Srl | Processo di decapaggio e di passivazione di acciaio inossidabile senza acido nitrico |
| FR2683551B1 (fr) * | 1991-11-07 | 1994-09-16 | Ugine Sa | Procede de decapage de materiaux en acier en continu sur une ligne de traitement. |
| DE4423664A1 (de) * | 1994-07-07 | 1996-05-15 | Bwg Bergwerk Walzwerk | Verfahren zum Herstellen von kaltgewalzten Stahlbändern aus nichtrostendem Stahl und Metallbändern, insbesondere aus Titanlegierungen |
| IT1276955B1 (it) * | 1995-10-18 | 1997-11-03 | Novamax Itb S R L | Processo di decapaggio e passivazione di acciaio inossidabile senza impiego di acido nitrico |
-
1996
- 1996-02-27 FR FR9602405A patent/FR2745301B1/fr not_active Expired - Fee Related
-
1997
- 1997-02-25 AU AU14884/97A patent/AU711782B2/en not_active Ceased
- 1997-02-25 JP JP05701797A patent/JP4186131B2/ja not_active Expired - Fee Related
- 1997-02-26 ES ES97400433T patent/ES2156344T3/es not_active Expired - Lifetime
- 1997-02-26 ZA ZA971647A patent/ZA971647B/xx unknown
- 1997-02-26 DE DE69704732T patent/DE69704732T2/de not_active Expired - Lifetime
- 1997-02-26 BR BR9701076A patent/BR9701076A/pt not_active IP Right Cessation
- 1997-02-26 AT AT97400433T patent/ATE201057T1/de active
- 1997-02-26 CN CN97109913A patent/CN1084801C/zh not_active Expired - Fee Related
- 1997-02-26 CA CA002198631A patent/CA2198631C/fr not_active Expired - Fee Related
- 1997-02-26 EP EP97400433A patent/EP0792949B1/fr not_active Expired - Lifetime
- 1997-02-27 US US08/807,634 patent/US5851304A/en not_active Expired - Lifetime
- 1997-02-27 KR KR1019970006274A patent/KR100448972B1/ko not_active Expired - Fee Related
- 1997-03-31 TW TW086104093A patent/TW517099B/zh not_active IP Right Cessation
-
1998
- 1998-09-16 US US09/154,515 patent/US5992196A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| BR9701076A (pt) | 1998-09-01 |
| FR2745301A1 (fr) | 1997-08-29 |
| EP0792949A1 (fr) | 1997-09-03 |
| AU711782B2 (en) | 1999-10-21 |
| DE69704732T2 (de) | 2001-09-13 |
| TW517099B (en) | 2003-01-11 |
| DE69704732D1 (de) | 2001-06-13 |
| US5992196A (en) | 1999-11-30 |
| CA2198631C (fr) | 2004-08-31 |
| US5851304A (en) | 1998-12-22 |
| CN1084801C (zh) | 2002-05-15 |
| KR970062075A (ko) | 1997-09-12 |
| AU1488497A (en) | 1997-09-11 |
| KR100448972B1 (ko) | 2004-12-08 |
| ZA971647B (en) | 1998-08-26 |
| FR2745301B1 (fr) | 1998-04-03 |
| MX9701425A (es) | 1998-03-31 |
| ES2156344T3 (es) | 2001-06-16 |
| CN1168823A (zh) | 1997-12-31 |
| ATE201057T1 (de) | 2001-05-15 |
| JP4186131B2 (ja) | 2008-11-26 |
| CA2198631A1 (fr) | 1997-08-27 |
| JPH101791A (ja) | 1998-01-06 |
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