CN110062819A - Method for using coating layer that uncoated steel band is electroplated - Google Patents
Method for using coating layer that uncoated steel band is electroplated Download PDFInfo
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- CN110062819A CN110062819A CN201780076997.0A CN201780076997A CN110062819A CN 110062819 A CN110062819 A CN 110062819A CN 201780076997 A CN201780076997 A CN 201780076997A CN 110062819 A CN110062819 A CN 110062819A
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- Prior art keywords
- plating
- band
- electrolyte
- coating layer
- trivalent
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
-
- 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
-
- 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
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
- C25D3/06—Electroplating: Baths therefor from solutions of chromium from solutions of trivalent chromium
-
- 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
-
- 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
- C25D7/0642—Anodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D9/00—Electrolytic coating other than with metals
- C25D9/04—Electrolytic coating other than with metals with inorganic materials
- C25D9/08—Electrolytic coating other than with metals with inorganic materials by cathodic processes
- C25D9/10—Electrolytic coating other than with metals with inorganic materials by cathodic processes on iron or steel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The present invention relates to the methods for using the coating layer from trivalent Cr- electrolyte that uncoated steel band is electroplated, so that uncoated band is subjected to cleaning and acid pickling step before plating process and then is subjected to plating process in a series of plating section comprising continuous plating slots, the band into the first plating slot is wherein applied a current in the first stage of plating process, the electric current is not enough to from trivalent Cr- electrolyte deposition coating layer, but it is enough to provide the cathodic protection of band in the electrolyte, and higher electric current is wherein applied to band with from trivalent Cr- electrolyte deposition packet containing chromium metal in the second stage of plating process, the coating layer of chromium carbide and chromated oxide.
Description
This invention is related to method and its improvement for using coating layer that uncoated steel band is electroplated.
In steel tape material plating, cold-rolled steel band is provided, is usually annealed after cold rolling to by tying again
Crystalline substance annealing or recovery annealing soften steel.After anneal with cleaning steel band first before plating for going oil removing and other tables
Face pollutant.Mainly, alkaline cleaner is used for this purpose, is electrochemical passivation in wherein steel, i.e. steel band table
Face is covered with stable and protective oxide film and therefore steel will not be dissolved in alkaline cleaner.Alkaline cleaner is various
The complex mixture of ingredient.Main component is caustic soda for providing alkalinity, conductibility and saponification.Other common groups are divided into partially
Sodium metasilicate, sodium carbonate, phosphate, borate and surfactant.
After cleaning, pickling steel band is for removing oxidation film in sulfuric acid solution or hydrochloric acid solution.Not
Steel band always is rinsed to prevent the solution of previous processing step from polluting for connecing down with deionized water between same processing step
The solution for the processing step come.Then rinse steel band completely after acid pickling step.Steel band is being rinsed and shifted to plating
Form new thin oxide layer during section immediately in exposed steel surface.
The method used in plating is referred to as electro-deposition.Part (steel band) to be plated is the cathode of circuit.Circuit
Anode can for be made of the metal to be plated on part (anode of dissolution, for example, it is conventional it is tin plating used in those) or
The anode of dimensionally stable (it is not dissolved during plating).Two components are all immersed in the referred to as solution of electrolyte.?
At cathode, interface of the metal ion between solution and cathode in electrolyte solution is reduced, so that they are deposited to yin
On extremely.
Electrolyte is acid solution in many cases.Therefore, the oxide skin(coating) formed after acid pickling step will be rapid
Dissolution.There is no the exposed steel of any oxidation film to be easy to corrode.Corrosion means that the iron from steel substrate is oxidized to Fe2+,
Wherein the reduction of the oxygen by hydrogen ion or dissolution in the electrolyte consumes free electron.
2H++2e-→H2(g)
O2(g)+4H++4e-→2H2O
The result is that electrolyte becomes rich in Fe2+.Depending on electrolyte, these Fe2+Ion is in next plating step
It is subsequently reduced into Fe and this Fe is deposited together with the metal being plated to substrate intentionally to substrate.The iron of co-deposition
Negatively affect the property of coating layer, especially corrosive nature.
The object of the present invention is to provide for using the coating layer from trivalent Cr- electrolyte that uncoated steel band is electroplated
Improved method.
The purpose of the present invention, which is still used, is electroplated the plating that uncoated steel band generates by using trivalent Cr- electrolyte
Layer provides improved property to steel band.
By the method for using the coating layer from trivalent Cr- electrolyte that uncoated steel band is electroplated reach one or
Multiple purposes, wherein uncoated band is subjected to cleaning and acid pickling step before plating process to remove one or more of band
Oxide present on a surface and any other pollutant, and wherein then make band comprising a series of continuous plating slots
Plating section in be subjected to plating process, wherein being applied a current in the first stage of plating process into the first plating slot
Band, which is not enough to from trivalent Cr- electrolyte deposition coating layer, but it is enough to provide the yin of band in the electrolyte
Pole protection, and higher electric current is wherein applied to band with from according to the present invention three in the second stage of plating process
The coating layer of valence Cr- electrolyte deposition packet containing chromium metal, chromium carbide and chromated oxide.
US3316160 is disclosed for preventing chromium-plated steel in the plating operation for including two or more vertical plating slots
From the method with blue color (tint) of chromic acid coating solution on band.In the method, in the first downwardly and upwardly road
Secondary middle current density height is to realize electrolysis chromium plating.Then steel band is guided into the second plating slot and in the second downward passage
It is much lower with current density in any subsequent downward passage, and high current density water is returned in the second upward passage again
It is flat.This low, high current density processing during repeating in each subsequent slot in downwardly and upwardly passage.In Xiang Shangdao
The reduction of current density eliminates the film (the reason of it is band blue color) of complicated chromated oxide during secondary.
The present invention is explained by reference to the specific arrangement of plating section used in industry, it should be noted that the present invention is not
It is intended to limited to this, and a series of any plating section comprising continuous plating slots can be applied to.In embodiment of the present invention
In, plating section is made of a series of vertical plating slots for obtaining enough total anode lengths in limited occupied area.
In the method being known in the art, without applying electric current during the first downward passage.Coating solution is first entered in band
The first downward passage in, the remaining moisture film for being sticked to steel band surface from rinsing step is plated electrolyte present in slot
Instead of, and steel band is also heated to the temperature of electrolyte.When steel band is exposed to electrolyte, the shape after acid pickling step
At oxide skin(coating) will quickly dissolve (referring to Fig. 1).In the method according to the invention, it applies a current to and first enters electrolysis
The band (referring to fig. 2) of matter.It is necessary that selection electric current makes the deposition for being not carried out coating layer, but changes steel in electrolyte
Current potential make steel band be protected cathodically and not dissolve.In the method according to the invention, the electricity in the first plating slot
It solves matter and is not therefore rich in Fe2+, however the electrolyte in the first plating slot is rich in Fe in prior art approaches2+.In the first plating
In slot therefore this shortage enrichment of electrolyte prevents Fe2+Drag-out (drag-out) to subsequent plating slot.Subsequent
Electric current is improved in plating slot with from the coating layer of trivalent Cr- electrolyte deposition packet containing chromium metal, chromium carbide and chromated oxide.?
Iron is deposited on band together with chromium in Cr (III) electrolyte.Have found that iron negatively affects in Cr-CrCx-CrOx coating
Corrosive nature.It is therefore important that keeping the iron level in Cr (III) electrolyte as low as possible.This by least first to
At lower passage and preferably apply low current also in all other passages for being not used for plating and realizes.It can be to be plated in guidance
A series of any inoperative plating slot of plating slots for passing through of band in using according to the method for the present invention.Adopting can not afford
The plating slot of effect, the plating slot mean to guide band by but without plating behavior occurs, such as when skipping one
Or when multiple plating slots, but guided band passes through caused by the construction of entire plating facility.In embodiment party of the invention
Electrolyte is acid in case.
About (J.H.O.J.Wijenberg, M.Steegh, M.P. from the Mechanism Study of trivalent chromium electrolyte layers of chrome
Deposit Aarnts, K.R.Lammers, J.M.C.Mol, Electrodeposition of mixed chromium metal-
carbide-oxide coatings from a trivalent chromium-formate electrolyte without
173 (2015) 819-826. of a buffering agent, Electrochim.Acta) have found trivalent chromium plating process very
Different from conventional plating process, wherein metal ion is reduced directly to metal by electric current: Men++ne-→Me.Such as from
This method known to tin plating method.In contrast to this, Cr (III) plating process is based on improving in the surface p H caused by Hydrogen evolving reaction
Quick, the staged deprotonation of water ligand in Cr (III) complex ion caused.This causes there are so-called " mode I ",
Wherein without deposited metal being applied with electric current (referring to Fig. 3).Apply low current and causes Hydrogen evolving reaction.Pass through surface p H
It improves and completes H+The ion remaval of ion, this leads to following acid-base reaction:
[Cr(HCOO)(H2O)5]2++OH-→[Cr(HCOO)(OH)(H2O)4]++H2The presence of O mode I is for Cr (III)
It is unique for plating process and is not present in during conventional plating.Inventor obtains new idea to be advantageously employed
This specific characteristic of Cr (III) plating process.By in the first downward passage apply low current not only form it is a small amount of
Hydrogen, and the current potential negative offset (the phenomenon that being known as cathodic protection) of steel.Due to negative potential, steel band will no longer corrode.
Not only protection steel band is from corrosion, but also (part) ferriferous oxide film is reduced into ferrous metal, thus even further decreases
Iron in electrolyte picks up (pick up).It is clear that moisture film will be replaced still by electrolyte and will also when a current is applied
Heat steel band.It can be very small for must applying for protecting the electric current of steel band.It is limited by square formula (II)
It limits (referring to Fig. 3).
[Cr(HCOO)(OH)(H2O)4]++OH-→Cr(HCOO)(OH)2(H2O)3+H2O Cr(HCOO)(OH)2(H2O)3Shape
At the deposit on cathode.A part of Cr (III) of deposit is reduced into Cr- metal and formates decomposes so as to cause shape
At Cr- carbide.If Cr (III) is not completely reduced into Cr- metal, there is also Cr- oxides in deposit.Deposition
The amount and composition of object depend on the electric current, mass flux and the electrolysis time that apply.The current density for mode of entrance II
Critical value is improved with the raising of linear velocity, because of this and the H that explain in article as mentioned above+Mass flux it is related.
Pass through the H from a large amount of electrolyte to electrode surface+It is very fast supplement hinder deposition Cr (HCOO) (OH)2(H2O)3Required table
Face pH is improved.So needing higher current density identical at electrode surface for obtaining in the case where the linear velocity of raising
PH improve.Therefore there is no the fixation critical values that mode I terminates and mode II starts, but are easy through simple experiment
Approach, which is simply monitored, to be started with the coating layer deposition of current density change to measure this critical value.It is drawn when to current density
When the deposition of chromium, mode I-III is visible (see, for example Fig. 4).Mode I is there are electric current but still undeposited region.Table
Face pH is not enough to chromium deposition.Mode II is when deposition starts and total chrome coating weight is as current density improves until it reaches
When peak value and employing mode III decline, wherein deposit starts to dissolve in mode III:
Cr(HCOO)(OH)2(H2O)3+OH-→[Cr(HCOO)(OH)3(H2O)2]-+H2O
The continuous plating lines of high speed be defined as making to be generally in at least speed of 100m/min ribbon form to
The mobile plating lines passed through of plated base material.Steel band volume is placed on to the arrival end of plating lines, entrance (eye) exists
Extend on horizontal plane.Then the front end of coil strip is unfolded and is soldered to processed band tail end.When leaving production line
Separate coiled material again and around coiled, or be cut to different length simultaneously (usual) around coiled.Electrodeposition process can therefore continue and
It does not interrupt, and the use of band accumulator avoids the need for speed decline in the welding process.It is preferable to use allow even more
The deposition method of high speed.It is preferably allowed in the method in accordance with the invention at least 200m/min, more preferably at least 300m/
The base steel of coating is prepared in the continuous high speed plating lines to work under the linear velocity of min and even more desirably at least 500m/min
Material.Although there is no limitations to maximum speed, it is clear that speed is higher, control deposition process, prevent drag-out and
Plating parameter and its limitation become more difficult.So maximum speed is limited in 900m/min as suitable maximum value.
Although can be applied to any steel band according to the method for the present invention, it is preferred that from band chosen below:
Zero single or the fully hard black sheet of cold rolling thinned twice；
The black sheet of zero cold rolling and recrystallization annealing；
The black sheet of zero cold rolling and recovery annealing,
Zero deposition or the soft sheet tin for melting state；Trimming, it does not dissolve tin (snijkanten, tin lost niet op)
Zero iron-tin alloy the diffusion annealing formed with the FeSn (50 atom % iron and 50 atom % tin) by least 80%
Sheet tin；
The steel substrate of the coating wherein generated is intended to use in packaging applications.
In the case where sheet tin, the dissolution of Fe may alternatively appear at strip edge and (band can be cut to correct width).Root
It also assures according to method of the invention and is dissolved during passing through the passage of plating slot without tin when there is no plating.
It will be clear that realizing cathodic protection in mode I but avoiding across critical value into mode II required electricity
Current density depends not only on process conditions such as linear velocity, and depends on the attribute of substrate.The composition of electrolyte be also it is relevant,
Because the critical value between the dynamic viscosity influence mode I and mode II of electrolyte is (referring to fig. 4 between the bath of sodium base and the bath of potassium base
Difference).
Invention be also embodied in for carrying out in equipment according to the method for the present invention.In such a device, the equipment packet
It is used to include chromium gold from trivalent Cr- electrolyte deposition containing a series of continuous plating slots filled with suitable trivalent Cr- electrolyte
Belong to, the coating layer of chromium carbide and chromated oxide, provides the first approach for applying a current into electricity in the first plating slot
The band of matter is solved, which is not enough to from trivalent Cr- electrolyte deposition coating layer, but it is enough to provide band in the electrolyte
Cathodic protection.The second approach is provided so that more high current to be applied to the band in the first plating slot downstream to be electrolysed from trivalent Cr-
Matter deposits the coating layer of packet containing chromium metal, chromium carbide and chromated oxide.
Invention be also embodied in equipment, it is used to apply a current to subsequent plating slot (wherein not wherein also providing approach
Occur plating) in be present in band in electrolyte or by electrolyte, electric current is not enough to from trivalent Cr- electrolyte deposition
Coating layer, but it is enough to provide cathodic protection of the band in the electrolyte present in the plating slot.Subsequent plating slot
Mean the combination of any one slot or any slot after the first plating slot.
The present invention is described referring now to following non-limiting embodiment.
The double walled glass connecting with constant temperature bath is filled with freshly prepd trivalent chromium electrolyte.Passed through by hot water circuit
Double walled glass makes the temperature of electrolyte be held constant at 50 ± 1 DEG C.The composition of electrolyte are as follows: 120g l-1Basic sulfate
Chromium, 100g l-1Sodium sulphate and 41.4g l-1Sodium formate.Pass through addition sulphur acid for adjusting pH to 2.8 measured at 25 DEG C.It uses
Be connected to Autolab PGSTAT303N potentiostat/galvanostat three-electrode system (i.e. working electrode, to electrode and reference
Electrode) it is tested.Galvanostat is in working electrode and to maintaining the controlled constant electric current being defined by the user between electrode, and phase
For the current potential for the working electrode that the potential monitoring of reference electrode changes over time.Working electrode is mounted in from Pine
Mild steel cylindricality insert in the special bracket of Instrument Company, with 12mm outer diameter and 8mm length, thus
With about 3cm2Electroactive surface product.
Assisting (to) electrode is the titanium with the mixed metal oxide coating of catalysis of iridium oxide and tantalum pentoxide
Netted band.Reference electrode is saturated calomel electrode (SCE).Steel column is exposed to electrolyte for 24 hours without applying in reference experiments
Add electric current and only every 60s record corrosion potential.Corrosion potential is -0.602V relative to SCE.It repeats to test, but applies now
Add 2A dm-2Small cathode current.By doing so, current potential to negative offset about 0.6V to relative to SCE be -1.2V.In electricity
It solves weighing steel column before and after testing and is analyzed by inductively coupled plasma atomic emission spectrometry (ICP-AES) electric
Solve the Fe content of matter.When not having to apply electric current, 147mg l is measured-1Concentration of iron, very well correspond to from steel column shape
The weight loss of insert value calculated.In contrast to this, insignificant iron is only measured in the electrolyte, in the electrolyte
Protect steel electrode from corrosion by applying low current.It is not measured by the weight loss of steel column shape insert and in steel electrode
Upper no deposition chromium, because employing mode I executes experiment.
Table 1- experiment summary and analysis result.
Claims (7)
1. the side for uncoated steel band to be electroplated using coating layer in a series of plating section comprising continuous plating slots
Method is characterized in that from trivalent Cr- electrolyte deposition coating layer during plating, wherein making uncoated band in plating process
It is subjected to cleaning and acid pickling step before to remove oxide present on one or more surfaces of band and any other pollution
Object, and wherein band is then made to be subjected to plating process in plating section, wherein will be electric in the first stage of plating process
Stream is applied to the band into the first plating slot, which is not enough to from trivalent Cr- electrolyte deposition coating layer, but is enough to mention
For the cathodic protection of band in the electrolyte, and higher electric current is wherein applied to band in the second stage of plating process
Material is with from the coating layer of trivalent Cr- electrolyte deposition packet containing chromium metal, chromium carbide and chromated oxide.
2. according to the method described in claim 1, wherein apply a current to one, it is multiple or all there is no plating
Band in subsequent plating slot, wherein the electric current is not enough to the electrolyte deposition coating layer from plating slot, but wherein should
Electric current is enough to provide the cathodic protection of band in the electrolyte.
3. method according to claim 1 or 2, wherein the Cr- electrolyte include chromium sulfate (III) and one kind below or
It is a variety of: sodium sulphate, sodium formate, potassium sulfate, potassium formate and sulfuric acid.
4. method according to claim 1 or 2, wherein the Cr- electrolyte includes chromium sulfate (III), sodium sulphate, sodium formate
And sulfuric acid.
5. method according to claim 1 or 2, wherein the Cr- electrolyte includes chromium sulfate (III), potassium sulfate, potassium formate
And sulfuric acid.
6. method according to claim 1 or 2, wherein the Cr- electrolyte includes sulfovinic acid chromium (III) (CrOHSO4)、
Formic acid and optionally sulfuric acid and/or NaOH.
7. method according to any one of claim 1 to 6, wherein the anode in plating slot includes iridium oxide or mixing
The catalyst coatings of metal oxide.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16198708 | 2016-11-14 | ||
| EP16198708.6 | 2016-11-14 | ||
| PCT/EP2017/078582 WO2018087135A1 (en) | 2016-11-14 | 2017-11-08 | Method for electroplating an uncoated steel strip with a plating layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110062819A true CN110062819A (en) | 2019-07-26 |
| CN110062819B CN110062819B (en) | 2021-07-23 |
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ID=57288304
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780076997.0A Active CN110062819B (en) | 2016-11-14 | 2017-11-08 | Method for electroplating uncoated steel strip with a coating |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP3538688B1 (en) |
| JP (1) | JP7066707B2 (en) |
| KR (1) | KR102387496B1 (en) |
| CN (1) | CN110062819B (en) |
| BR (1) | BR112019009702B1 (en) |
| CA (1) | CA3043486C (en) |
| ES (1) | ES2883716T3 (en) |
| MX (1) | MX2019005540A (en) |
| RS (1) | RS62127B1 (en) |
| RU (1) | RU2743357C2 (en) |
| WO (1) | WO2018087135A1 (en) |
| ZA (1) | ZA201903049B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114207191A (en) * | 2019-08-05 | 2022-03-18 | Sms集团有限公司 | Method and device for electrolytically coating steel strip by means of pulse technique |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11542620B2 (en) * | 2018-02-09 | 2023-01-03 | Nippon Steel Corporation | Steel sheet for containers and method for producing steel sheet for containers |
| DE102018132074A1 (en) | 2018-12-13 | 2020-06-18 | thysenkrupp AG | Process for producing a metal strip coated with a coating of chromium and chromium oxide based on an electrolyte solution with a trivalent chromium compound |
| DE102018132075A1 (en) * | 2018-12-13 | 2020-06-18 | thysenkrupp AG | Process for producing a metal strip coated with a coating of chromium and chromium oxide based on an electrolyte solution with a trivalent chromium compound |
| JP2022521963A (en) * | 2019-02-25 | 2022-04-13 | タタ、スティール、アイモイデン、ベスローテン、フェンノートシャップ | Manufacturing method of chrome oxide coated tinplate |
| DE102019109356A1 (en) * | 2019-04-09 | 2020-10-15 | Thyssenkrupp Rasselstein Gmbh | Process for the production of a metal strip coated with a coating of chromium and chromium oxide based on an electrolyte solution with a trivalent chromium compound and an electrolysis system for carrying out the process |
| DE102019109354A1 (en) * | 2019-04-09 | 2020-10-15 | Thyssenkrupp Rasselstein Gmbh | Process for passivating the surface of a black plate or a tin plate and an electrolysis system for carrying out the process |
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| US3316160A (en) * | 1962-08-16 | 1967-04-25 | Fuji Iron & Steel Co Ltd | Process for electrolytic chromium-plating steel strips without a bluish tint while using two or more plating tanks |
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| CN104919091A (en) * | 2012-11-21 | 2015-09-16 | 塔塔钢铁艾默伊登有限责任公司 | Chromium-chromium oxide coatings applied to steel substrates for packaging applications and a method for producing said coatings |
| WO2015177314A1 (en) * | 2014-05-21 | 2015-11-26 | Tata Steel Ijmuiden B.V. | Method for plating a moving metal strip and coated metal strip produced thereby |
| CN105473767A (en) * | 2013-06-20 | 2016-04-06 | 塔塔钢铁艾默伊登有限责任公司 | Method for manufacturing chromium-chromium oxide coated substrates |
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|---|---|---|---|---|
| DE3115041A1 (en) * | 1981-04-14 | 1982-11-04 | Harald Albrecht | Apparatus for electroplating metal strips |
| SU1294875A1 (en) * | 1984-11-11 | 1987-03-07 | Московский вечерний металлургический институт | Electrolyte for deposition of protective-decorative chromium coatings |
| SU1730207A1 (en) * | 1989-12-27 | 1992-04-30 | Московский вечерний металлургический институт | Method of chrome-plating |
| RU2031982C1 (en) * | 1992-10-12 | 1995-03-27 | Товарищество с ограниченной ответственностью - Научно-внедренческая коммерческая фирма "НВК" | Method of preparing of chrome-base composition coatings |
| JP3704221B2 (en) | 1997-02-26 | 2005-10-12 | 新日本製鐵株式会社 | Method for preventing dissolution of steel strip in tin plating bath |
| JP3405517B2 (en) * | 1997-03-31 | 2003-05-12 | ティーディーケイ株式会社 | Electroplating method and apparatus |
| JP3984767B2 (en) * | 1999-10-25 | 2007-10-03 | 株式会社日立製作所 | Plating equipment |
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2017
- 2017-11-08 KR KR1020197014843A patent/KR102387496B1/en active IP Right Grant
- 2017-11-08 ES ES17797316T patent/ES2883716T3/en active Active
- 2017-11-08 EP EP17797316.1A patent/EP3538688B1/en active Active
- 2017-11-08 BR BR112019009702-3A patent/BR112019009702B1/en active IP Right Grant
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| CN114207191A (en) * | 2019-08-05 | 2022-03-18 | Sms集团有限公司 | Method and device for electrolytically coating steel strip by means of pulse technique |
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| EP3538688A1 (en) | 2019-09-18 |
| RU2019118305A (en) | 2020-12-14 |
| EP3538688B1 (en) | 2021-05-26 |
| MX2019005540A (en) | 2019-10-21 |
| BR112019009702A2 (en) | 2019-08-06 |
| JP2019533768A (en) | 2019-11-21 |
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| RU2019118305A3 (en) | 2020-12-16 |
| BR112019009702B1 (en) | 2023-03-28 |
| CA3043486C (en) | 2021-03-09 |
| WO2018087135A1 (en) | 2018-05-17 |
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| ZA201903049B (en) | 2020-09-30 |
| KR20190077437A (en) | 2019-07-03 |
| CA3043486A1 (en) | 2018-05-17 |
| RU2743357C2 (en) | 2021-02-17 |
| RS62127B1 (en) | 2021-08-31 |
| JP7066707B2 (en) | 2022-05-13 |
| KR102387496B1 (en) | 2022-04-15 |
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