CN104562120A - Steel strip tinning method - Google Patents
Steel strip tinning method Download PDFInfo
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- CN104562120A CN104562120A CN201510033576.2A CN201510033576A CN104562120A CN 104562120 A CN104562120 A CN 104562120A CN 201510033576 A CN201510033576 A CN 201510033576A CN 104562120 A CN104562120 A CN 104562120A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 26
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 238000007747 plating Methods 0.000 claims description 14
- 238000005238 degreasing Methods 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 10
- 238000002161 passivation Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 238000005554 pickling Methods 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 208000011580 syndromic disease Diseases 0.000 claims description 4
- 238000009713 electroplating Methods 0.000 claims description 3
- 238000002203 pretreatment Methods 0.000 claims description 3
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 claims description 2
- FEPBITJSIHRMRT-UHFFFAOYSA-N 4-hydroxybenzenesulfonic acid Chemical compound OC1=CC=C(S(O)(=O)=O)C=C1 FEPBITJSIHRMRT-UHFFFAOYSA-N 0.000 claims description 2
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 238000005470 impregnation Methods 0.000 claims description 2
- NNIPDXPTJYIMKW-UHFFFAOYSA-N iron tin Chemical compound [Fe].[Sn] NNIPDXPTJYIMKW-UHFFFAOYSA-N 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 2
- 239000001488 sodium phosphate Substances 0.000 claims description 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 6
- 238000003860 storage Methods 0.000 abstract description 6
- 238000007639 printing Methods 0.000 abstract description 5
- 230000037303 wrinkles Effects 0.000 abstract description 5
- 239000003973 paint Substances 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000005028 tinplate Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000009533 lab test Methods 0.000 description 4
- 102100036092 Alpha-endosulfine Human genes 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 101000876352 Homo sapiens Alpha-endosulfine Proteins 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010186 staining Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- 238000005282 brightening Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000006210 lotion Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 235000013324 preserved food Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
The invention discloses a steel strip tinning method which comprises the following steps: 1) pretreatment; 2) electrotinning; 3) 1# baking; 4) soft melting; 5) passivating treatment; 6) 2# baking; and 7) oil application. The tinned plate obtained by the continuous tinning method has uniform thickness; the tin coating is uniform and smooth on the whole surface and does not have flaws, dents, wrinkles, rusty stains and other defects unsuitable for use; and under normal storage and use conditions, the whole surface is suitable for paints and printing.
Description
Technical field
The invention belongs to technical field of metal material surface treatment, be specifically related to a kind of method zinc-plated with steel.
Background technology
Tin plate has good corrosion resistance, and have certain intensity and hardness, good moldability is easily welded again, and tin layers is nonpoisonous and tasteless, can prevent iron from dissolving into packed article, and surface-brightening, printing picture can beautify commodity.Be mainly used in canned food industry, secondly for wrapping material such as chemical paint, oils, medicine.Tin plate is divided into hot dip sheet tin and electrolytic tinplate by production technique.Statistics tin plate output must by the Weight computation after coating.
Tin plate in existing market, more or less there is following shortcoming: thickness of coating is unanimously uneven, and tin layers is smoothly uneven on the surface, exist fault, indenture, wrinkle, rust staining etc. be unfavorable for use defect, make its surface be not suitable for coating and printing.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of thickness of coating uniformity, and can meet the method for band steel continuous tin plating.
In order to solve the problem, technical scheme of the present invention is: a kind of method zinc-plated with steel, the steps include:
1) pre-treatment: be with steel by chemical degreasing, scrub for the 1st time; Electrochemical degreasing, to scrub for the 2nd time; Pickling, the method such as to scrub for 3 times, remove greasy dirt and the oxide compound on its surface;
Described chemical degreasing: under 60 ~ 80 DEG C of temperature condition, be chemical degreasing (free alkalinity 30 ~ 60 point of 30 ~ 50g/L by impregnation concentrations with steel, usually, when result of laboratory test is lower than 35g/L, need to add supplementary), then scrub through the 1st time, the greasy dirt of 95% can be removed;
Inspection and interpolation: when result of laboratory test will be added supplementary lower than 35g/L flow measurement, target value calculates by 35g/L adds (will guarantee the concentration 30g/L that hands over to the next shift);
Described electrochemical degreasing: under 60 ~ 80 DEG C of temperature condition, concentration is grease-removing agent (free alkalinity 45 ~ 80 point of 30 ~ 50g/L, usually when result of laboratory test is lower than 35g/L, need to add and supplement) in solution, adopt bipolar electrolytic method to carry out electrolytic degreasing, band steel removes whole greases after electrolytic degreasing and the 2nd time are scrubbed;
Electric current adjusts by the maximum capacity of every platform rectifier, and every two hours reverse once; Inspection and interpolation: concentration per tour of grease-removing agent detects once, when result of laboratory test will be added supplementary lower than 35g/L flow measurement, target value is pressed 25g/L and is calculated interpolation;
Described pickling: under normal temperature (20 ~ 25 DEG C), utilizes concentration to be the H of 15 ~ 30g/L
2sO
4the aqueous solution (usually when concentration is lower than 20g/L, need to supplement and add), and keep Fe wherein
2+ion≤15g/L (works as Fe
2+during > 15g/L, all should discharge, again prepare; New complex acid washing lotion is not owing to having Fe
2+ion, concentration is joined by 15g/L), adopt bipolar electrolytic method to carry out oxide compound and the activation belt steel surface of the method removing belt steel surface of electrolysis; Scrub for 3rd time: after pickling, scrub whether the clean impact on tin plating electrolyte is very large.Wash-down water is Cl
-content is less than the water of 5mg/L, adopts overflow to change in production;
Inspection and adjustment: per tour is checked once, H
2sO
4concentration will supplement interpolation lower than during 20g/L, and target value is pressed 25g/L and added; Work as Fe
2+during > 15g/L, all should discharge, again prepare; New complex acid washing lotion is not owing to having Fe
2+ion, concentration is joined by 15g/L;
2) eleetrotinplate: in electroplate liquid, the concentration of each component controls:
Sn
+：25～34g/L；
Free acid is (with H
2sO
4meter): 11 ~ 17g/L;
Sodium phosphate (ENSA): 3 ~ 6g/L;
Sn
2+∶[H
+]＝2∶0.9～1.1；
Electroplating temperature: 30 ~ 45 DEG C;
Inspection and adjustment: work as Sn
2+, [H
+] ratio of concentration exceeds normal rates 10%, adjust in time (no matter any situation, plating solution is heated and is not allowed static heating, must circulation limit, limit heat)
Plating solution manages: plating solution volume should control at 35 ~ 45m
3it is interior that (after making work nest, vault storage tanks will have 12m
3more than participate in circulation); General 1# Ethylene recov regulates and controls; Insoluble anode also can be finely tuned; Notice that before coating bath, effect extracted by effect conductive rollers pressure roller together with last of extracting of squeezing roller.Sulfocarbolic acid (PSA) and ENSA is added by assay and carry-over loss.
Addition means: no matter joining PSA, ENSA with plating solution or 1# Ethylene recov all needs fully to stir half an hour more than.Plating solution storage tanks is slowly put into after stirring.
Sn in plating solution
2+concentration controls within the scope of 25 ~ 34g/L, when more than 30g/L, can take measures in advance, uses insoluble anode.When using insoluble anode, add PSA less.Work as Sn
2+when concentration is lower than 25g/L, suitably can increases the addition of PSA by the upper limit, make Sn
2+concentration suitably improves.
During production, zinc-plated strainer will come into operation continuously, and strainer per tour is thoroughly cleaned once.Tin plating electrolyte storagetank mud quarterly clearly once.
The control of tin coating weight: under the strip width of specifying and strip speed situation, tin coating weight is controlled by total current substantially, and relational expression is:
G＝3.69×10－2×(I/B·V)·y；
In formula: G: tin coating weight (g/m
2); I: zinc-plated total current (A); B: strip width (m); V: strip speed (m/ divides); Y: cathode efficiency;
The using and changing of anode: the profile of anode and size should meet the requirements, uses Anodic thickness >=20mm, use only be left 20mm before must change;
Anode arrangement width should 30-40mm narrower than strip width; Different steel width needs radical as following table:
| Strip width mm | 650～750 | 750～860 | 860～940 | 940～1000 |
| Need radical | 6 | 7 | 8 | 9 |
Rectifier using priciple:
In order to alleviate white edge and anode striped, avoid the rectifier with opening an aqueduct front and back as far as possible;
The easy long tin flower of one side do not opened after use arranged out by rectifier.More than per tour must be changed and use rectifier once;
During Gao Xiliang plating, first row anode arrangement is wanted evenly, dispersion.
3) electroplate liquid reclaims: after pot, be provided with two electroplate liquid accumulator tanks, has both play and has reclaimed plating solution effect, and played fusing assistant again;
1# reclaims: ratio Sn
2+/ H
+can not control, but best=1:1; Work as Sn
2+during>=10g/L, be suitably recovered to pot; Add PSA in right amount by its concentration during recovery, stir well even after put into underground storage tank; During reprovision 1# Ethylene recov, guarantee H
+> 2g/L.
2# reclaims: Sn
2+/ H
+=1: 2 (Sn
2+concentration is: 1 ~ 2g/L, H
+concentration is: 2 ~ 4g/L), at any time with PSA adjustment, guarantee that reclaim ratio at 1: 2; Sn
2+during > 2g/L, add to 1# accumulator tank; Temperature: normal temperature
4) 1# is dried: dry wind-warm syndrome: 90 ~ 120 DEG C; Dry air quantity: 150Nm
3/ min;
5) soft heat: by treating that zinc-plated band steel is heated to more than 232 DEG C, making its surface-brightening and forming tin iron alloy layer, to improve solidity to corrosion and tin layers to the sticking power of base steel;
Soft heat: alloy layer thickness general control is at 0.3 ~ 1.5g/m
2in enclosing, control alloy layer by different tin coating weight;
Hardening: tin layers at high temperature rapid oxidation and carry out hardening process, the water temperature of hardening groove after preventing soft heat: 65 DEG C ~ 85 DEG C; There is hardening defect will adjust water temperature and nozzle angle, or dredging nozzle;
6) Passivation Treatment: band steel, after soft heat, and then carries out passivation, improves the anti-corrosion capability on tin layers surface, mainly sulfur resistance and anti-heating discoloration;
Treatment process: sodium dichromate 99 (Na
2cr
2o
7): 20 ~ 30g/L; PH value: 4.0 ~ 5.5; Temperature: 45 ~ 55 DEG C;
When pH value higher than 5.5 time, add appropriate chromic anhydride and regulate, regulate target value to be 4.8;
Should carry out stringency wash and drying after Passivation Treatment, spray adopts Cl
-content is less than the Water spray of 5mg/L; Finally spray temperature together: 60 ~ 80 DEG C;
7) 2# is dried: dry wind-warm syndrome: 110 ~ 140 DEG C; Dry air quantity: 200Nm
3/ min;
8) oiling: can play corrosion protection effect, lubrication after coating oil film, reduces transit rub, improves processing characteristics during tank processed.
The present invention has following beneficial effect: the tin plate that continuous tin plating method disclosed by the invention obtains, its thickness uniformity, tin layers all uniform smooth on the whole surface, the defect that fault, indenture, wrinkle, rust staining etc. are unfavorable for using must not be there is, in normal storage with under using, its whole surface should be suitable for coating and printing.
Embodiment
Below by embodiment, the present invention is specifically described.
Embodiment
Raw sheet
1) specification
2) mechanical property:
Tensile strength: 451N/mm
2;
Yield strength: 294N/mm
2;
3) hardness value:
4) raw sheet surface appearance: raw sheet surface should be cleaned rustless, oiling is even, and being coated with oil mass is 30 ~ 70mg/ ㎡ (two-sided), general employing bag face, pitted skin, wet look.
5) tolerance of dimension: steel plate maximum ga(u)ge tolerance must not exceed ± and 8.5%, target value≤± 4%; With plate difference maximum must not more than 4%, target value≤2%; Width tolerance+3 ,-0.
6) other: the raw sheet state of batching should be that edge is neat, and degree of tightness is suitable, do not allowed turriform, heart, etc. phenomenon occur.Template requires good.Have limit wave, the middle wave more than 3mm, though or have the limit wave, the middle wave that are less than 3mm, continued presence has rectifys that uneven horizontal wooden dipper is bent, oppositely wooden dipper is bent; Have wrinkle, limit damage, hole, spot, be mingled with, limit is split, be rolled into the raw sheet of the defects such as oil stain volume all do defective coil process.
7) tin coating weight: specify by GB-2520 and JIS G3303 standard.Nominal tin coating weight is as following table:
8) alloy layer (target value): 10# 0.4 ~ 0.9g/m
2
25# 0.5～1.2g/m
2
50# 0.6～1.4g/m
2
10#/25#; 25#/50#; The alloy layer of the thick tin coating weight of difference of specification is determined by intermediate value.
9) passivation: the total chrome target value of passive film: 4 ~ 10mg/m
2, the chrome content of passive film also can be adjusted according to the requirement of user.
10) oil film: with DOS oil
Micro-oiling target value: 1 ~ 3mg/m
2(one side);
Dab oil target value: 3 ~ 6mg/m
2(one side).
Visual appearance: the thickness uniformity of certified products tin plate, tin layers all uniform smooth on the whole surface, must not there is the defect that fault, indenture, wrinkle, rust staining etc. are unfavorable for using, in normal storage with under using, its whole surface should be suitable for coating and printing.
Claims (5)
1., with the method that steel is zinc-plated, the steps include:
1) pre-treatment: band steel by chemical degreasing, scrub for the 1st time, electrochemical degreasing, to scrub for the 2nd time, pickling, scrub for the 3rd time and pre-treatment is carried out to band steel;
2) eleetrotinplate: by pretreated band steel eleetrotinplate under 30 ~ 45 DEG C of temperature condition, in electroplating process, in electroplate liquid, the concentration of each component is:
Sn
+：25～34g/L；
Free acid, with H
2sO
4meter: 11 ~ 17g/L;
Sodium phosphate: 3 ~ 6g/L;
[Sn
2+]∶[H
+]＝2∶0.9～1.1；
In electroplating process, the control of tin coating weight: under appointment strip width and strip speed situation, tin coating weight is controlled by total current, and relational expression is:
G＝3.69×10－2×(I/B·V)·y；
In relational expression: G: tin coating weight, unit g/ ㎡; I: zinc-plated total current, unit A; B: strip width, unit m; V: strip speed, unit m/min; Y: cathode efficiency;
3) 1# is dried: dried by the band steel after zinc-plated, dry wind-warm syndrome: 90 ~ 120 DEG C; Dry air quantity: 150Nm
3/ min;
4) soft heat: zinc-plated band steel is heated to more than 232 DEG C, makes its surface form tin iron alloy layer;
5) Passivation Treatment: band steel after soft heat, then carries out passivation;
6) 2# is dried: dried by the zinc-plated band steel after Passivation Treatment, dry wind-warm syndrome: 110 ~ 140 DEG C; Dry air quantity: 200Nm
3/ min;
7) oiling: zinc-plated belt steel surface evenly coats oil film.
2. a kind of method zinc-plated with steel according to claim 1, is characterized in that: described chemical degreasing processing condition: under 60 ~ 80 DEG C of temperature condition, and band steel is chemical degreasing in the grease-removing agent of 30 ~ 50g/L by impregnation concentrations;
Described electrochemical degreasing: under 60 ~ 80 DEG C of temperature condition, concentration is in the grease-removing agent solution of 30 ~ 50g/L, adopts bipolar electrolytic method to carry out electrolytic degreasing to band steel;
Described pickling: under 20 ~ 25 DEG C of temperature condition, utilizes concentration to be the H of 15 ~ 30g/L
2sO
4the aqueous solution carries out pickling, and keeps the Fe in solution
2+ionic concn≤15g/L.
3. a kind of method zinc-plated with steel according to claim 1 and 2, is characterized in that: in described reflow step: alloy layer thickness controls at 0.3 ~ 1.5g/m
2;
Zinc-plated band steel after soft heat carries out hardening process in 65 DEG C ~ 85 DEG C water.
4. a kind of method zinc-plated with steel according to claim 1 and 2, is characterized in that: described Passivation Treatment step process processing condition: sodium dichromate 99: 20 ~ 30g/L; PH value: 4.0 ~ 5.5; Temperature: 45 ~ 55 DEG C;
Cl is adopted after Passivation Treatment
-content is less than the Water spray of 5mg/L.
5. a kind of method zinc-plated with steel according to claim 1 and 2, is characterized in that: the electroplate liquid recycling after plating terminates: after plating terminates, and electroplate liquid is carried out 1# and reclaims and 2# recovery;
Described 1# reclaims: not control Sn
2+/ H
+ratio; Work as Sn
2+during>=10g/L, be recovered to pot;
Described 2# reclaims: under 20-25 DEG C of condition, utilizes sulfocarbolic acid to adjust control Sn
2+/ H
+=1: 2 ± 0.2; Work as Sn
2+during > 2g/L, add to 1# accumulator tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510033576.2A CN104562120A (en) | 2015-01-23 | 2015-01-23 | Steel strip tinning method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510033576.2A CN104562120A (en) | 2015-01-23 | 2015-01-23 | Steel strip tinning method |
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|---|---|
| CN104562120A true CN104562120A (en) | 2015-04-29 |
Family
ID=53079168
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|---|---|---|---|
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105506725A (en) * | 2015-12-17 | 2016-04-20 | 天津市富仁板带有限公司 | Steel strip degreasing process |
| CN105543922A (en) * | 2015-12-17 | 2016-05-04 | 天津市富仁板带有限公司 | Steel strip tinning technique |
| CN107739808A (en) * | 2017-09-14 | 2018-02-27 | 首钢京唐钢铁联合有限责任公司 | Water quenching process method and device for electroplated tin wire |
| CN107740173A (en) * | 2017-09-15 | 2018-02-27 | 首钢京唐钢铁联合有限责任公司 | Edge quality control method of high-tin-content tin plate |
| CN107893246A (en) * | 2017-10-24 | 2018-04-10 | 首钢京唐钢铁联合有限责任公司 | Production method of low-lead tin-plated plate |
| CN107904638A (en) * | 2017-10-30 | 2018-04-13 | 河钢集团衡水板业有限公司 | The production method of high adhesion force electrolytic tinplate |
| CN108342767A (en) * | 2018-02-28 | 2018-07-31 | 首钢京唐钢铁联合有限责任公司 | Automatic liquid feeding system of electrotinning production line chromic acid |
| CN108796584A (en) * | 2017-04-28 | 2018-11-13 | 宝山钢铁股份有限公司 | A kind of tin-plated product surface passivated membrane structural flexibility control method |
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| CN110551997A (en) * | 2018-06-04 | 2019-12-10 | 上海梅山钢铁股份有限公司 | Chromium-free passivation solution for electrotinning steel plate and use method thereof |
| CN110565127A (en) * | 2019-09-04 | 2019-12-13 | 首钢京唐钢铁联合有限责任公司 | Method for eliminating tin surface defect of K plate |
| CN110885999A (en) * | 2018-09-10 | 2020-03-17 | 上海梅山钢铁股份有限公司 | Chromic acid passivation method for cold-rolled electroplated tin steel plate |
| CN111139462A (en) * | 2020-01-16 | 2020-05-12 | 鲍合祥 | Electrotinning treatment process |
| CN112538591A (en) * | 2019-09-23 | 2021-03-23 | 上海梅山钢铁股份有限公司 | Cold-rolled electroplated tin steel plate with excellent coating performance and manufacturing method thereof |
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