EP2173927A2 - Installation et procédé pour l'étamage électrolytique de bandes d'acier, mettant en oeuvre une anode insoluble - Google Patents
Installation et procédé pour l'étamage électrolytique de bandes d'acier, mettant en oeuvre une anode insolubleInfo
- Publication number
- EP2173927A2 EP2173927A2 EP08826511A EP08826511A EP2173927A2 EP 2173927 A2 EP2173927 A2 EP 2173927A2 EP 08826511 A EP08826511 A EP 08826511A EP 08826511 A EP08826511 A EP 08826511A EP 2173927 A2 EP2173927 A2 EP 2173927A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- anode
- tin
- zone
- electrolytic solution
- installation
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 17
- 239000010959 steel Substances 0.000 title claims abstract description 17
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 69
- 238000004090 dissolution Methods 0.000 claims abstract description 45
- 239000012528 membrane Substances 0.000 claims abstract description 32
- 239000003792 electrolyte Substances 0.000 claims abstract description 30
- 125000002091 cationic group Chemical group 0.000 claims abstract description 22
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 238000000909 electrodialysis Methods 0.000 claims abstract description 14
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 10
- 238000004070 electrodeposition Methods 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims description 38
- 239000008151 electrolyte solution Substances 0.000 claims description 34
- 150000002500 ions Chemical class 0.000 claims description 24
- 239000002253 acid Substances 0.000 claims description 22
- 238000007872 degassing Methods 0.000 claims description 20
- 150000001875 compounds Chemical class 0.000 claims description 11
- 238000009713 electroplating Methods 0.000 claims description 10
- 239000008187 granular material Substances 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 150000001450 anions Chemical class 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 239000012811 non-conductive material Substances 0.000 claims description 2
- 229920001225 polyester resin Polymers 0.000 claims description 2
- 239000004645 polyester resin Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 239000002198 insoluble material Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 7
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 150000007513 acids Chemical class 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229940098779 methanesulfonic acid Drugs 0.000 description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 3
- IULJSGIJJZZUMF-UHFFFAOYSA-N 2-hydroxybenzenesulfonic acid Chemical compound OC1=CC=CC=C1S(O)(=O)=O IULJSGIJJZZUMF-UHFFFAOYSA-N 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-N sulfonic acid Chemical compound OS(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-N 0.000 description 2
- 229910001432 tin ion Inorganic materials 0.000 description 2
- 239000005028 tinplate Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000011034 membrane dialysis Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- AICMYQIGFPHNCY-UHFFFAOYSA-J methanesulfonate;tin(4+) Chemical compound [Sn+4].CS([O-])(=O)=O.CS([O-])(=O)=O.CS([O-])(=O)=O.CS([O-])(=O)=O AICMYQIGFPHNCY-UHFFFAOYSA-J 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- HXTSPGYEPSIZKP-UHFFFAOYSA-N phenol;tin Chemical compound [Sn].OC1=CC=CC=C1 HXTSPGYEPSIZKP-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/30—Electroplating: Baths therefor from solutions of tin
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/002—Cell separation, e.g. membranes, diaphragms
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/16—Regeneration of process solutions
- C25D21/18—Regeneration of process solutions of electrolytes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
- C25D7/0628—In vertical cells
Definitions
- the invention generally relates to insoluble anode electrolytic tinning of steel strips, and more particularly to an insoluble anode electrolytic tinning process and the installation for its implementation.
- the lack of toxicity of tin and the excellent protection against corrosion it brings to steel have long led to the use of tin-plated mild steel in the field of food packaging where it is known under the name of "tinplate”.
- the manufacture of tinplate is generally made from coils ("coils") of mild steel or ultra-soft, which previously undergo a hot rolling operation, followed by a cold rolling operation. At the end of these rolling operations, steel strips of a few tenths of a millimeter thick are obtained.
- These strips are then annealed, passed after annealing in a cold rolling mill ("skin passed"), degreased, etched and tinned by an electrolytic tinning process (or “electro-tinning”). Tinning is typically followed by finishing operations such as coating remelting, passivation, and oiling.
- Electro-tinning is a process of electrodeposition of tin on a metal substrate, which consists in establishing the transfer of Sn 2+ stannous ions to the next strip to be coated.
- This reaction involves the availability of stannous ions in the bath.
- the bath has an acid for lowering the pH and increasing the electrical conductivity. It also contains additives that contribute, inter alia, to stabilize the stannous ions by preventing them from oxidizing, and to prevent the formation of stannic oxide sludge caused by the oxidation of these stannous ions.
- the first category of processes includes processes using a soluble anode, or so-called “soluble anode” processes
- the second category of processes includes processes implementing a insoluble anode, or so-called “insoluble anode” processes.
- soluble anode electro-tinning processes are carried out in electrolytic tinning installations which mainly use high-purity tin anodes (that is to say anodes comprising at least 99.85% by weight of tin), which dissolve during electrolysis and charge the bath with stannous Sn 2+ ions.
- FIG. 1 An example of a "soluble anode” electro-tinning installation known to those skilled in the art is shown in FIG. 1. It is a vertical electro-tinning installation 1, in which a 2 to be coated in a coating tank 3 (or still electro-depositing tray) by winding on two conductive rollers 41, 42 and a bottom roller 5, thus forming a downstream strand 21 and a rising strand 22.
- the two conducting rollers 41, 42 feed the strip 2 with electrical current.
- the tin soluble anodes 61, 62 are disposed on either side of the falling 21 and up 22 strands of the steel strip 2 to be coated.
- This steel strip 2 is connected to the negative pole (represented by the symbol "-" in FIG . 1) of an electric current generator (not shown in FIG.
- insoluble anode electro-tinning processes
- the tin anode is replaced by an insoluble anode, for example a titanium anode with a coating of a metal (for example a metal of the platinum) or a metal oxide.
- the tin ions necessary for the coating are, in this case, derived from the electrolyte bath itself in the form of a compound of formula SnA 2 , A being an acid radical.
- the reactions taking place at the anode and at the cathode are obviously different: 1 at the cathode: SnA 2 + 2e -> Sn + 2A • at the anode: H 2 O - "HO 2 + 2H + + 2e "
- US Pat. No. 5,312,539 proposes another "insoluble anode" tinning process, which uses an anionic membrane dialysis cell and a separate tin dissolution unit in which tin is supplied as an oxide directly dissolved in the acid, or as a tin anode, which is dissolved electrolytically.
- Such a method has certain disadvantages, and in particular the cost of tin oxide and the need to create a strong concentration gradient on either side of the membrane, which imposes the implementation of a unit of concentration.
- the necessary membrane surface (of the order of several thousand m 2 for continuous tinning installations of steel strips) makes the industrial application very problematic. .
- a variant of this process is proposed by Japanese Patent Application JP 51-71499 which groups together the functions of dissolving tin and dialysis in the same tank equipped with two anionic membranes.
- the installation is less complex than that of US Pat. No. 5,314,539, and does not solve the problems of membrane surface or concentration gradient.
- the subject of the present invention is therefore a method of electro-tinning and an installation for its implementation which remedy the drawbacks of the prior art, by the use of an electrodialysis membrane or cationic electrolysis in the device of dissolution of tin.
- cationic electrodialysis membrane is understood to mean a membrane permeable to cations and which is typically used in an electrodialysis process.
- cationic electrolysis membrane is meant, in the sense of the present invention, a cation-permeable membrane typically used in a process membrane electrolysis, but which can advantageously be used in the electrodialysis process according to the invention because of its robustness and its ability to withstand higher current densities than a cationic electrodialysis membrane.
- the present invention more particularly relates to an installation for the electrolytic tinning of a steel strip in continuous running, said installation comprising: "at least one electroplating tank filled with an electrolytic solution which comprises an acid AH and Sn 2+ stannous ions in the form of a SnA 2 compound with A denoting an acid function, said electroplating tank comprising an insoluble anode immersed in the electrolytic solution of the electroplating tank and a cathode constituted by the scrolling metal strip continuously in the electrolytic solution of the plating tank, and
- a tin dissolving reactor which comprises an insoluble cathode and at least one soluble tin anode.
- the tin anode and the insoluble cathode are separated by a cationic membrane of electrodialysis or electrolysis, defining a cathode zone integrating the cathode and an anode zone integrating the tin anode, and a recirculation circuit of the electrolytic solution connects the electrodeposition tank to the anode zone of the tin dissolution reactor.
- a cationic electrodialysis membrane in the dissolution reactor between the soluble tin anode and the insoluble cathode allows the H + ions of the electrolytic solution to pass through the membrane, from the anode zone to the zone. cathodic, while the Sn 2+ ions produced at the anode remain predominantly in the anode zone of the reactor.
- the electrolytic solution contained therein is then recharged with stannous ions, and can then be directed back to the coating tank.
- the recirculation circuit of the electrolytic solution between the electroplating tank and the anode zone of the tin dissolution reactor comprises an oxygen degassing tank, which is arranged upstream of the dissolution reactor in the direction of circulation of the electrolyte in this recirculation circuit.
- This degassing tank makes it possible to effectively eliminate the gaseous oxygen formed at the insoluble anode of the coating tank.
- the plant according to the invention also further comprises a degassing circuit of the electrolytic solution contained in the cathode zone of the tin dissolution reactor, this degassing circuit incorporating a hydrogen degassing tank.
- the acid AH is advantageously chosen from sulphonic acids.
- sulphonic acids that can be used according to the present invention, mention may be made especially of methanesulfonic acid and phenol-sulphonic acid.
- the preferred sulfonic acid is methanesulfonic acid. If a sulphonic acid, and in particular an acid selected from among methanesulfonic acid, and phenol-sulphonic acid are used, the SnA 2 compound will therefore advantageously be a tin suifonate corresponding to the preferred sulphonic acids according to US Pat. invention: tin phenol sulphonate or tin methane sulphonate.
- the present invention also relates to a process for the electrolytic tinning of a continuous steel strip in at least one electroplating tank filled with an electrolytic solution which comprises an acid AH and stannous Sn 2+ ions under form of a compound SnA 2 with A denoting an acid function, said tinning process employing a non-soluble anode and the metal strip constituting a cathode which are immersed in the electrolytic solution and between which a potential difference is applied, and the SnA 2 compound from a tin dissolution reactor, which comprises an insoluble cathode and a tin anode, between which a potential difference is applied.
- the concentration of AH acid in the electrolytic solution of the coating tank is kept constant by carrying out the following steps: a) a cationic membrane of electrodialysis or electrolysis between the tin anode and the insoluble cathode, thereby defining a cathode zone incorporating the insoluble cathode and an anode zone; and b) circulating a portion of the electrolytic solution between the electrodeposition tank and the anode zone of the tin dissolution reactor.
- FIG. 1 is a cross-sectional diagram of an example of an installation electro-tinning with soluble anode according to the state of the art
- FIG. 2 is a cross-sectional diagram of an example of an insoluble anode electro-tinning installation according to the state of the art
- FIG. 3 is a cross-sectional schematic diagram of an example of an electro-tinning installation according to the invention.
- FIG. 4 represents a cross-sectional diagram of an example of a dissolution reactor of an electro-tinning installation according to the invention
- FIG. 5 is a bottom view showing a view from above of another example of a dissolution reactor of an electro-tinning installation according to the invention.
- the electro-tinning (or electrolytic tinning) installation shown in FIG. 1 is a soluble anode electro-tinning installation 1 of the state of the art, which was previously described in the reference to FIG. the prior art which precedes.
- the electro-tinning (or electrolytic tinning) installation shown in FIG. 2 is an insoluble anode electro-tinning installation 1 of the state of the art, which was previously described in the reference to FIG. the prior art which precedes.
- FIG. 3 shows a block diagram of an example installation according to the invention, wherein the web to be coated 20 and an insoluble anode 60 are partially immersed in an electroplating tank (or coating tank) containing an electrolytic solution (or electrolyte) containing Sn 2+ stannous ions as a SnA compound 2 and an acid AH, A being an acidic radial.
- an electroplating tank or coating tank
- electrolytic solution or electrolyte
- the compound SnA 2 comes from a tin dissolution reactor 10, which comprises an insoluble cathode 120 and a soluble tin anode 160, which are immersed in a tank 130 also containing the same electrolytic solution as the coating tank 30
- a cationic electrodialysis or electrolysis membrane 140 is disposed between the electrodes 120, 160 of the reactor 10, so that the reservoir 130 of the reactor 10 is divided into a cathode zone 1200 containing the insoluble cathode 120 and anode zone 1600. containing the soluble anode 160.
- the anode 160 of the reactor 10 is constituted by tin granules 161 contained in a basket 162 (called “dissolution basket”). of tin ").
- This basket 162 filled with granules 161 is connected to the positive pole (represented by the symbol “+” in FIG. 3) of a source of electric current (not represented in FIG. 3), the tin aggregates 161 playing the role of soluble anode.
- the insoluble cathode 120 of the tin dissolution reactor 10 is connected to the negative pole (represented by the symbol "-" in FIG. 3) of the same electric power source.
- As a soluble anode 160 it is also possible to use, in the tin dissolution reactor 10 of the plant according to the invention, an anode in massive form (not shown in Figures 3 to 5).
- the electro-tinning installation shown in FIG. 3 comprises, in addition to the coating tank 30 and the tin dissolution reactor 10, an oxygen degassing tank 210 and a gas degassing tank. hydrogen 310.
- the oxygen degassing tank 210 is part of a recirculation circuit 200 of the electrolyte connecting the coating tank 30 and the anode zone 1600 of the dissolution reactor 10, the degassing tank 210 being disposed upstream of the reactor dissolution (10) in the direction of recirculation of the electrolyte in the circuit 200.
- the hydrogen degassing tank 310 is part of a recirculation circuit 300 of the electrolyte contained in the cathode zone 1200 of the dissolution reactor 10, in which the electrolyte is subjected to a degassing of hydrogen in a hydrogen degassing tank 310.
- An electrolyte depleted of stannous ions is thus obtained, part of which is taken from the coating tank 30, and is then subjected to degassing of the oxygen gas in the degassing tank 210 before being introduced into the anode zone 1600 of the dissolution reactor 10.
- the electrolytic dissolution of the tin granules 161 ensures the production of Sn 2+ stannous ions, which thanks to the selective permeability of the cationic membrane 140 remain mainly in the vicinity of the anode.
- CMX-S cationic membrane
- the cationic membrane 140 has a selective permeability that allows the transfer of ions H + to the cathode 120 and the maintenance of Sn 2+ ions near the anode 160.
- the electrolyte of the anodic zone 1600 thus recharged with stannous ions can then be recovered and directed again towards the coating tank 30.
- the H + ions present in the anodic zone 1600 cross the cationic membrane 140 because of the field
- the H + ions recovered in the cathode zone 1200 of the reactor 10 are then recombined with the A " anions, in order to reform the acid AH.
- FIG. 4 shows an example of a dissolution reactor 10 according to the invention, comprising a tank 130 filled with electrolyte, which may be of cylindrical shape and which is separated in two by a cationic electrodialysis membrane 140, which may also be of cylindrical shape, thus defining a central anode zone 1600 comprising the soluble anode 160, and an external cathode zone 1200 having the cathode
- the cylindrical shape of the reservoir 130 and the cationic membrane 140 is given here by way of example. But, the reservoir 130 and the cationic membrane 140 may also be of parallelepipedal shape.
- the cathode 120 is connected to the negative pole of a source of electric current (represented by the symbol "-" in FIG. 4) and the anode 160 is connected, in its upper part, to the positive pole (represented by the symbol “ + “In Figure 4) of the same source of electric current.
- FIG. 4 shows that the soluble anode of tin 160 comprises a dissolution basket 162 comprising tin granules 161.
- This basket 162 is divided into three distinct superimposed parts: a lower zone 1621 immersed in the electrolyte contained in the tank 130; a middle zone 1622 for recovering the electrolyte, which is situated above the lower zone 1621 by being contiguous thereto and which is not immersed in the electrolyte contained in the reservoir 130, but which is wetted by the solution electrolytic when circulated in circuit 200, and an upper dry zone 1623 for supplying dry tin granules 161 and transmitting electrical dissolution current.
- the lower 1621 and middle 1622 areas of the dissolution basket 162 of the anode 160 are both made of non-electrically conductive material.
- an electrically nonconductive material usable according to the invention for producing the lower zones 1621 and median 1622 of the basket 162 of the soluble anode 160 plastics, and composites such as the polyester resins and the polyesters, are recommended. polymers coated steels.
- the upper region 1623 for supplying tin granules 161 is made of an electrically conductive material.
- the lower zone 1621 immersed in the electrolyte comprises a mesh 163 comprising a plastic mesh net adapted to the retention of tin granules, between 0.05 and 0.50 mm, and preferably between 0.1 and 0, 30 mm.
- This net is supported by the shell of the basket which has openings for contacting the electrolyte, which are at least 50 times wider than the mesh of the net. Openings (in dashed lines in FIG. 4) are formed in FIG. envelope of basket 162.
- the median zone 1622 includes a recovery trough 164 of the regenerated electrolyte, this trough being supplied via a trellis 165
- the median zone 1622 is wetted by the electrolytic solution of the tank 130 circulating in the circuit 200.
- the upper zone 1623 comprises a filling hopper 166 in tin granules 161, which is connected to the positive pole of the power supply source and which transmits the electric dissolution current into the bed of tin pellets. via the contact surfaces between the tin granules and the electrically conductive material hopper.
- the lower zone 1621 of the basket 162, which is immersed in the electrolyte, is surrounded by a cationic membrane 140 of circular shape.
- This cationic membrane 140 is advantageously supported by at least one plastic net, which makes it possible to ensure the rigidity of the membrane 140.
- the electrolyte to be treated is introduced into the lower zone 1621 of the basket by intake pipes 201 at a pressure sufficient to allow it to overflow into the recovery trough 164 of the median zone 1622.
- the electric current ensures the dissolution of said granules 161 and the acid is charged with Sn ++ ions which remain close to the anode 160.
- the electrolyte and reloaded tin is recovered at the level of the trough 164, before being returned to the coating tank 30 via the return lines 202.
- FIG. 5 is shown in plan view another example of a dissolution reactor 10 according to the invention, which comprises a plurality of soluble anodes 160 each having a basket 162 filled with tin granules 161, each basket 162 being surrounded by a cationic membrane 140 circular.
- a feed device 400 in granules 161 serves hoppers 166 of all baskets 162 of the dissolution reactor 10.
- This device 400 may be a treadmill or vibrating, or non-electrically conductive pipes.
- the device 400 operates intermittently according to a given signal by a granule level detection device in the hoppers 166, so as to maintain a constant level of granules 161 in the basket 162.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Electrolytic Production Of Metals (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0705487A FR2919311B1 (fr) | 2007-07-26 | 2007-07-26 | Installation et procede pour l'etamage electrolytique de bandes d'acier, mettant en oeuvre une anode insoluble. |
| PCT/FR2008/000789 WO2009013398A2 (fr) | 2007-07-26 | 2008-06-09 | Installation et procédé pour l'étamage électrolytique de bandes d'acier, mettant en oeuvre une anode insoluble |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2173927A2 true EP2173927A2 (fr) | 2010-04-14 |
| EP2173927B1 EP2173927B1 (fr) | 2011-02-09 |
Family
ID=39253869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08826511A Not-in-force EP2173927B1 (fr) | 2007-07-26 | 2008-06-09 | Installation et procédé pour l'étamage électrolytique de bandes d'acier, mettant en oeuvre une anode insoluble |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2173927B1 (fr) |
| AT (1) | ATE498025T1 (fr) |
| DE (1) | DE602008004917D1 (fr) |
| ES (1) | ES2360020T3 (fr) |
| FR (1) | FR2919311B1 (fr) |
| WO (1) | WO2009013398A2 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9157160B2 (en) | 2013-08-22 | 2015-10-13 | Ashworth Bros., Inc. | System and method for electropolishing or electroplating conveyor belts |
| CN112111762A (zh) * | 2020-09-26 | 2020-12-22 | 深圳市海里表面技术处理有限公司 | 高光洁度料带镀锡工艺及其制得的料带 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5318168B2 (fr) * | 1973-11-28 | 1978-06-13 | ||
| US4181580A (en) * | 1973-11-28 | 1980-01-01 | Nippon Steel Corporation | Process for electro-tin plating |
| JP2559935B2 (ja) * | 1991-12-20 | 1996-12-04 | 日本リーロナール株式会社 | 不溶性陽極を用いた錫又は錫ー鉛合金電気めっきの方法及び装置 |
| US5312539A (en) * | 1993-06-15 | 1994-05-17 | Learonal Inc. | Electrolytic tin plating method |
-
2007
- 2007-07-26 FR FR0705487A patent/FR2919311B1/fr not_active Expired - Fee Related
-
2008
- 2008-06-09 WO PCT/FR2008/000789 patent/WO2009013398A2/fr not_active Ceased
- 2008-06-09 ES ES08826511T patent/ES2360020T3/es active Active
- 2008-06-09 EP EP08826511A patent/EP2173927B1/fr not_active Not-in-force
- 2008-06-09 DE DE602008004917T patent/DE602008004917D1/de active Active
- 2008-06-09 AT AT08826511T patent/ATE498025T1/de active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009013398A3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009013398A2 (fr) | 2009-01-29 |
| ES2360020T3 (es) | 2011-05-31 |
| FR2919311B1 (fr) | 2009-10-09 |
| DE602008004917D1 (de) | 2011-03-24 |
| EP2173927B1 (fr) | 2011-02-09 |
| FR2919311A1 (fr) | 2009-01-30 |
| ATE498025T1 (de) | 2011-02-15 |
| WO2009013398A3 (fr) | 2009-03-12 |
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