CN114086222A - Control method for shrinkage cavity defect of tin plate painting - Google Patents
Control method for shrinkage cavity defect of tin plate painting Download PDFInfo
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- CN114086222A CN114086222A CN202111321444.1A CN202111321444A CN114086222A CN 114086222 A CN114086222 A CN 114086222A CN 202111321444 A CN202111321444 A CN 202111321444A CN 114086222 A CN114086222 A CN 114086222A
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- tin
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- 239000005028 tinplate Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 54
- 230000007547 defect Effects 0.000 title claims abstract description 21
- 238000010422 painting Methods 0.000 title claims description 6
- 238000002161 passivation Methods 0.000 claims abstract description 52
- 238000000576 coating method Methods 0.000 claims abstract description 34
- 239000011248 coating agent Substances 0.000 claims abstract description 30
- 238000007639 printing Methods 0.000 claims abstract description 28
- 238000001035 drying Methods 0.000 claims abstract description 24
- 239000003973 paint Substances 0.000 claims abstract description 18
- 238000010008 shearing Methods 0.000 claims abstract description 10
- 230000003746 surface roughness Effects 0.000 claims abstract description 9
- 238000010301 surface-oxidation reaction Methods 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 14
- 239000003513 alkali Substances 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000004806 packaging method and process Methods 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 5
- 238000000137 annealing Methods 0.000 claims description 5
- 238000009713 electroplating Methods 0.000 claims description 5
- 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 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000010960 cold rolled steel Substances 0.000 claims description 4
- 238000001978 electrochemical passivation Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000002390 adhesive tape Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 9
- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical compound C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002199 base oil Substances 0.000 abstract description 2
- 239000011247 coating layer Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000000123 paper Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000011651 chromium Substances 0.000 description 3
- VJHINFRRDQUWOJ-UHFFFAOYSA-N dioctyl sebacate Chemical compound CCCCC(CC)COC(=O)CCCCCCCCC(=O)OCC(CC)CCCC VJHINFRRDQUWOJ-UHFFFAOYSA-N 0.000 description 3
- 239000012808 vapor phase Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- XRSBTDBLFNPGOE-UHFFFAOYSA-M O[Cr] Chemical compound O[Cr] XRSBTDBLFNPGOE-UHFFFAOYSA-M 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/30—Electroplating: Baths therefor from solutions of tin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/02—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/38—Chromatising
-
- 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
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention belongs to the technical field of coating layers, and particularly discloses a method for controlling a paint shrinkage cavity defect of a tin plate, wherein a surface structure with good coating property is formed on the surface of the tin plate by controlling a leveling process of a surface structure of the tin plate and controlling a passivation and drying process of a passivation film layer on the surface of the tin plate, the surface structure consists of a passivation film and an oil film, the surface roughness Ra is 0.4-0.6 mu m, and the surface peak density RPc is 70-90 pieces/cm; and the surface oxidation degree is reduced by controlling the environment of the tin plate before printing and coating after shearing, so that the good wettability is kept, the surface of the tin plate before coating has good coatability, and the problem of paint shrinkage of the tin plate is radically solved. The control method is simple and easy to implement, can meet the requirements of coating white Keding, golden yellow base oil and other coatings on the tin plate and using the tin plate in factories in southern humid and hot environments, and greatly reduces the shrinkage cavity incidence rate to be less than 0.02 percent from 0.5 percent of the traditional process.
Description
Technical Field
The invention belongs to the technical field of coating and plating layers, and particularly relates to a method for controlling a paint shrinkage cavity defect of a tin plate.
Background
The paint shrinkage is a common defect of tin plate in the process of tin plate coating, and is characterized in that a coating shrinks at a local position to form a dot-shaped small hole, the root of the paint is that the coating is not well infiltrated into a substrate, the infiltration capacity of the coating to the substrate is different due to various types of the coating, and the production conditions of different tin plate production lines are different, so that the problem of shrinkage is frequently caused, and particularly, the shrinkage is higher in the humid and hot weather in the south, and the steel plate raw material or the tin plate production process is difficult to completely distinguish to cause shrinkage.
The prior art starts from the production or printing and coating process of a tin plate on one side, and specifically comprises the following steps: the Chinese invention patent (application number: 201810469928.2) discloses a tin plate surface wettability evaluation method, which can effectively find a tin plate with a possibility of shrinkage cavity defects; the Chinese utility model patent (application number: 201320600394.5) discloses a roller coating device for a coating thin steel plate, which can control the coating thickness, adjust the speed, prevent the reverse side waiting material and adjust the plate thickness, and can identify various coating defects such as shrinkage cavity, fish eye, bubble and the like; the Chinese invention patent (application number: 201710295976. X) discloses a flexible control method for a surface passivation film structure of a tinned product, which can effectively adjust and flexibly control the content ratio of hydroxyl chromium and chromium oxide of a surface passivation film of the tinned product, and reduce the incidence rate of shrinkage cavity defects in the printing and coating of the tinned plate.
Although the prior art can predict the paint wettability of the tin plate or partially improve the coating performance of the tin plate, the problem of shrinkage cavity is difficult to solve fundamentally. Therefore, how to comprehensively improve the anti-shrinkage performance of the tin plate and reduce the deterioration of the coating performance of the steel plate before metal printing so as to enhance the adaptability of the coating and reduce the shrinkage rate in the production of the metal printing still remains a technical problem to be solved in the field.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a control method of the paint shrinkage cavity defect of the tin plate, which ensures that the surface of the tin plate before being coated has good coatability by controlling the leveling process of the surface structure of the tin plate, the passivation and drying process of the passivation film layer on the surface of the tin plate and combining the uncoiling, shearing and storage using methods before the tin plate is coated, and radically solves the paint shrinkage cavity problem of the tin plate.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a control method of the shrinkage cavity defect of the tin plate painting comprises a tin plate production process and an iron printing process; the tin plate production process is characterized in that a surface structure with good coating property is formed on the surface of the tin plate by controlling a flattening process of a tin plate surface structure and controlling a passivation and drying process of a passivation film layer on the surface of the tin plate, the surface structure consists of a passivation film and an oil film, the surface roughness Ra is 0.4-0.6 mu m, and the surface peak density RPc is 70-90 pieces/cm; the tin plate printing process reduces the surface oxidation degree by controlling the environment of the tin plate stored before printing and coating after the tin plate is sheared, so as to keep good wettability.
The improvement is that the production process of the tin plate comprises the following specific steps:
1) taking a low-carbon cold-rolled steel plate as a substrate, and carrying out alkali washing, annealing, flattening and coiling processes to obtain a tinned substrate;
2) and (2) carrying out alkali washing, acid washing, electroplating, fluxing, reflow, passivation, rinsing, drying, oiling and coiling on the tinned substrate obtained in the step 1) to obtain a tinned steel coil.
The improvement is that in the step 1), the leveling process is a dry leveling process which adopts a double-frame leveling machine and does not add leveling liquid, the roughness Ra of the roll surface of the No. 1 frame leveling roll is 1.6-1.7 mu m, the surface peak density RPc is 100-120/cm, the roughness Ra of the surface of the No. 2 frame leveling roll is 0.5-0.6 mu m, and the surface peak density RPc is 150-200/cm.
The improvement is that in the step 2), the passivation process adopts two passivation tanks for passivation, the passivation mode is electrochemical passivation, the passivation temperature is 41-43 ℃, the concentration of sodium dichromate in passivation solution is 18-22 g/L, the pH value of passivation solution is 4.5-4.6, and the electric quantity density of the No. 1 passivation tank is 1.0-1.2C/dm2The electric quantity density of the 2# passivation tank is 1.2-1.4C/dm2The thickness of the passivation film is 5-8 mg/m in terms of Cr content2。
The improvement is that in the step 2), the drying process is two-stage drying, wherein the drying temperature of No. 1 is 120-130 ℃, the drying time is 1-2 s, the drying temperature of No. 2 is 140-150 ℃, and the drying time is 1-2 s.
The improvement is that in the step 2), the oil coating process adopts DOS oil, and the oil coating amount is 2-4 mg/m2。
The improvement is that the iron printing process comprises the following specific steps: and (3) uncoiling, shearing, stacking, transferring, printing and baking the tinned steel coil obtained in the tinned plate production process to obtain a finished product of the tin printing plate.
The improvement is that the steel coil shearing time t2 is determined according to the production plan printing and coating time t1, and the requirements of t1-t2 are less than or equal to 72 hours; when t1-t2 is less than 8 hours, transferring the tin plate of the shear stack to a cool and dry area for standby; and when t1-t2 is more than or equal to 8 hours, packaging and protecting the sheared and stacked tinned plate, wrapping the inner layer by using a plastic film, and packaging the outer layer by using gas phase anti-rust paper and sealing by using an adhesive tape. The vapor phase antirust paper is a packaging material prepared by coating a vapor phase corrosion inhibitor on special kraft base paper, and corrosion inhibition gas molecules automatically volatilized from the vapor phase corrosion inhibitor impregnated in the paper at normal temperature are adsorbed on the metal surface to saturate the whole packaging space and moisture, so that a layer of molecular-level passivation film which has a corrosion inhibition effect on metal products and can inhibit the metal from rusting is formed, and the safe, clean and reliable metal antirust effect is achieved.
Has the advantages that:
the control method for the shrinkage cavity defect of the tin plate painting is simple and easy to implement, can meet the requirements that the tin plate is coated with white Kendin, golden yellow base oil and other coatings and is used in factories in a southern damp and hot environment, and the shrinkage cavity occurrence rate is greatly reduced to below 0.02 percent from 0.5 percent of the traditional process.
Detailed Description
The present invention will be described in further detail with reference to examples. The reagents or instruments used are not indicated by manufacturers, and are regarded as conventional products which can be purchased in the market.
In the production process of the tin plate, the processes of alkali washing, annealing and coiling in the step 1), the processes of alkali washing, acid washing, electroplating, fluxing, reflowing, rinsing and coiling in the step 2) and the processes of uncoiling, shearing, stacking, printing and baking in the process of iron printing are all known processes of technicians in the field, and specific operation steps and related parameters are not described again.
Example 1
The production process of the tin plate comprises the following steps: 1) taking a low-carbon cold-rolled steel plate as a substrate, performing alkali washing and annealing by adopting a conventional process, then adopting a double-rack temper mill and a dry temper rolling process without adding a temper rolling liquid, wherein the surface roughness Ra of a 1# rack temper rolling roller is 1.5 mu m, the surface peak density RPc is 100/cm, the surface roughness Ra of a 2# rack temper rolling roller is 0.6 mu m, and the surface peak density RPc is 200/cm, and then coiling to obtain a tinned substrate; 2) carrying out alkali washing, acid washing, electroplating, fluxing and reflow on the tin-plated substrate by adopting a conventional process, and then passivating by adopting two passivation tanks, wherein the passivation mode is electrochemical passivation, the passivation temperature is 42 ℃, the concentration of sodium dichromate in passivation solution is 20g/L, the pH value of passivation solution is 4.5, and the electric quantity density of a No. 1 passivation tank is 1.2C/dm2The electric quantity density of the 2# passivation tank is 1.4C/dm2The thickness of the passivation film (calculated by Cr content) reaches 8mg/m2(ii) a After rinsing, carrying out two-stage drying at the drying temperature of 120 ℃ for 1# for 2s, at the drying temperature of 150 ℃ for 2 s; then coating DOS oil (dioctyl sebacate) on the surface of the steel plate, wherein the oil coating amount is 2mg/m2(ii) a And coiling to obtain the tinned steel coil.
The iron printing process: according to a production plan, uncoiling and shearing a tinned steel coil 24 hours after shearing, packaging and protecting the sheared and stacked tinned plate after shearing, wrapping an inner layer by using a plastic film, packaging an outer layer by using gas-phase anti-rust paper and sealing by using an adhesive tape, removing the package before printing production, and carrying out normal printing and baking to obtain a finished product of the tin printing.
Comparative example 1
The production process of the tin plate comprises the following steps: 1) taking a low-carbon cold-rolled steel plate as a substrate, performing alkali washing and annealing by adopting a conventional process, then adopting a double-rack temper mill and a dry temper rolling process without adding a temper rolling liquid, wherein the surface roughness Ra of a 1# rack temper rolling roller is 1.0 mu m, the surface peak density RPc of the RPc is 60 pieces/cm, the surface roughness Ra of a 2# rack temper rolling roller is 0.4 mu m, and the surface peak density RPc of the RPc is 100 pieces/cm, and then coiling to obtain a tinned substrate; 2) the tin-plated substrate is subjected to alkali washing, acid washing, electroplating, fluxing and reflow by adopting a conventional process, and then is passivated by adopting two passivation tanks, wherein the passivation mode is electrochemical passivation, the passivation temperature is 50 ℃, the concentration of sodium dichromate in passivation solution is 15g/L, the pH value of passivation solution is 4.8, and the electric quantity density of a No. 1 passivation tank is 0.5C/dm2The electric quantity density of the 2# passivation tank is 0.8C/dm2The thickness of the passivation film (calculated by Cr content) reaches 3mg/m2(ii) a Carrying out one-stage drying after rinsing, wherein the drying temperature is 120 ℃, and the drying time is 2 s; then coating DOS oil on the surface of the steel plate, wherein the oil coating amount is 6mg/m2(ii) a And coiling to obtain the tinned steel coil.
The iron printing process: according to the production plan, the printing and coating time is 75 hours after the cutting, the tinned steel coil is uncoiled and cut, the common wrapping paper is covered on the sheared and stacked tinned plate after the cutting, and the tin plate finished product is obtained by normal printing and baking.
And (3) comparison statistics: the service condition of the tin plate produced by the traditional conventional process is tracked for 100 rolls (weighing 650 tons), the weight of the tin plate with the problem of paint shrinkage is counted to be 3.26 tons, and the shrinkage rate is 0.502%. The weight of the tin plate which is produced by the method and is tracked by 100 rolls (with the weight of 660 tons) and has the problem of paint shrinkage is counted to be 0.127 ton, and the shrinkage incidence rate is 0.019 percent. Therefore, the method effectively reduces the proportion of the shrinkage cavity defect of the tin plate paint.
The protection of the present invention is not limited to the above embodiments. Variations and advantages that may occur to those skilled in the art may be incorporated into the invention without departing from the spirit and scope of the inventive concept and the scope of the appended claims is intended to be protected.
Claims (8)
1. A control method for the shrinkage cavity defect of tin plate painting is characterized in that: comprises a tin plate production process and an iron printing process; the tin plate production process is characterized in that a surface structure with good coating property is formed on the surface of the tin plate by controlling a flattening process of a tin plate surface structure and controlling a passivation and drying process of a passivation film layer on the surface of the tin plate, the surface structure consists of a passivation film and an oil film, the surface roughness Ra is 0.4-0.6 mu m, and the surface peak density RPc is 70-90 pieces/cm; the tin plate printing process reduces the surface oxidation degree by controlling the environment of the tin plate stored before printing and coating after the tin plate is sheared, so as to keep good wettability.
2. The method for controlling paint shrinkage cavity defects of tin plate as claimed in claim 1, wherein: the production process of the tin plate comprises the following specific steps:
1) taking a low-carbon cold-rolled steel plate as a substrate, and carrying out alkali washing, annealing, flattening and coiling processes to obtain a tinned substrate;
2) and (2) carrying out alkali washing, acid washing, electroplating, fluxing, reflow, passivation, rinsing, drying, oiling and coiling on the tinned substrate obtained in the step 1) to obtain a tinned steel coil.
3. The method for controlling paint shrinkage cavity defects of tin plate as claimed in claim 2, wherein: in the step 1), the leveling process is a dry leveling process which adopts a double-frame leveling machine and does not add leveling liquid, the surface roughness Ra of the leveling roller of the No. 1 frame is 1.6-1.7 mu m, the surface peak density RPc is 100-120/cm, the surface roughness Ra of the leveling roller of the No. 2 frame is 0.5-0.6 mu m, and the surface peak density RPc is 150-200/cm.
4. A tinplate coating according to claim 2The control method of the paint shrinkage cavity defect is characterized by comprising the following steps: in the step 2), the passivation process adopts two passivation tanks for passivation, the passivation mode is electrochemical passivation, the passivation temperature is 41-43 ℃, the concentration of sodium dichromate in passivation solution is 18-22 g/L, the pH value of the passivation solution is 4.5-4.6, and the electric quantity density of the No. 1 passivation tank is 1.0-1.2C/dm2The electric quantity density of the 2# passivation tank is 1.2-1.4C/dm2The thickness of the passivation film is 5-8 mg/m in terms of Cr content2。
5. The method for controlling paint shrinkage cavity defects of tin plate as claimed in claim 2, wherein: in the step 2), the drying process is two-stage drying, wherein the drying temperature of No. 1 is 120-130 ℃, the drying time is 1-2 s, the drying temperature of No. 2 is 140-150 ℃, and the drying time is 1-2 s.
6. The method for controlling paint shrinkage cavity defects of tin plate as claimed in claim 2, wherein: in the step 2), the oiling process adopts DOS oil, and the oiling amount is 2-4 mg/m2。
7. The method for controlling paint shrinkage cavity defects of tin-plated sheet according to any one of claims 1 to 6, wherein: the iron printing process comprises the following specific steps: and (3) uncoiling, shearing, stacking, transferring, printing and baking the tinned steel coil obtained in the tinned plate production process to obtain a finished product of the tin printing plate.
8. The method for controlling paint shrinkage cavity defects of tin plate as claimed in claim 7, wherein: determining the steel coil shearing time t2 according to the production plan printing and painting time t1, wherein t1-t2 is less than or equal to 72 hours; when t1-t2 is less than 8 hours, transferring the tin plate of the shear stack to a cool and dry area for standby; and when t1-t2 is more than or equal to 8 hours, packaging and protecting the sheared and stacked tinned plate, wrapping the inner layer by using a plastic film, and packaging the outer layer by using gas phase anti-rust paper and sealing by using an adhesive tape.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111321444.1A CN114086222B (en) | 2021-11-09 | 2021-11-09 | Control method for tin plate painting shrinkage defect |
| PCT/CN2022/119331 WO2023082835A1 (en) | 2021-11-09 | 2022-09-16 | Method for controlling painting shrinkage cavity defect of tinplate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111321444.1A CN114086222B (en) | 2021-11-09 | 2021-11-09 | Control method for tin plate painting shrinkage defect |
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| CN114086222A true CN114086222A (en) | 2022-02-25 |
| CN114086222B CN114086222B (en) | 2023-11-10 |
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| CN202111321444.1A Active CN114086222B (en) | 2021-11-09 | 2021-11-09 | Control method for tin plate painting shrinkage defect |
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| WO (1) | WO2023082835A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115261856A (en) * | 2022-07-21 | 2022-11-01 | 首钢京唐钢铁联合有限责任公司 | Tin plate and preparation method thereof |
| CN115627502A (en) * | 2022-12-20 | 2023-01-20 | 张家港扬子江冷轧板有限公司 | Method for manufacturing tin-plated steel plate |
| WO2023082835A1 (en) * | 2021-11-09 | 2023-05-19 | 江苏沙钢集团有限公司 | Method for controlling painting shrinkage cavity defect of tinplate |
| CN117187900A (en) * | 2023-11-03 | 2023-12-08 | 江苏省沙钢钢铁研究院有限公司 | Coated tin plate for eight-treasure porridge pot and manufacturing method thereof |
| CN118028704A (en) * | 2024-04-11 | 2024-05-14 | 张家港扬子江冷轧板有限公司 | Shrink-resistant tin plate and production method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023082835A1 (en) * | 2021-11-09 | 2023-05-19 | 江苏沙钢集团有限公司 | Method for controlling painting shrinkage cavity defect of tinplate |
| CN115261856A (en) * | 2022-07-21 | 2022-11-01 | 首钢京唐钢铁联合有限责任公司 | Tin plate and preparation method thereof |
| CN115261856B (en) * | 2022-07-21 | 2024-04-09 | 首钢京唐钢铁联合有限责任公司 | Tinning plate and preparation method thereof |
| CN115627502A (en) * | 2022-12-20 | 2023-01-20 | 张家港扬子江冷轧板有限公司 | Method for manufacturing tin-plated steel plate |
| WO2024131067A1 (en) * | 2022-12-20 | 2024-06-27 | 张家港扬子江冷轧板有限公司 | Manufacturing method for tinplate |
| CN117187900A (en) * | 2023-11-03 | 2023-12-08 | 江苏省沙钢钢铁研究院有限公司 | Coated tin plate for eight-treasure porridge pot and manufacturing method thereof |
| CN117187900B (en) * | 2023-11-03 | 2024-02-09 | 江苏省沙钢钢铁研究院有限公司 | Coated tin plate for eight-treasure porridge pot and manufacturing method thereof |
| CN118028704A (en) * | 2024-04-11 | 2024-05-14 | 张家港扬子江冷轧板有限公司 | Shrink-resistant tin plate and production method thereof |
| CN118028704B (en) * | 2024-04-11 | 2024-06-28 | 张家港扬子江冷轧板有限公司 | Shrink-resistant tin plate and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114086222B (en) | 2023-11-10 |
| WO2023082835A1 (en) | 2023-05-19 |
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