WO2022131386A1 - 철 전기도금용액 및 이를 이용하여 제조된 전기도금 강판 - Google Patents
철 전기도금용액 및 이를 이용하여 제조된 전기도금 강판 Download PDFInfo
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- WO2022131386A1 WO2022131386A1 PCT/KR2020/018283 KR2020018283W WO2022131386A1 WO 2022131386 A1 WO2022131386 A1 WO 2022131386A1 KR 2020018283 W KR2020018283 W KR 2020018283W WO 2022131386 A1 WO2022131386 A1 WO 2022131386A1
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- Prior art keywords
- iron
- plating
- solution
- ions
- electroplating
- Prior art date
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 169
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 105
- 238000009713 electroplating Methods 0.000 title claims abstract description 72
- 229910000831 Steel Inorganic materials 0.000 title claims description 15
- 239000010959 steel Substances 0.000 title claims description 15
- 239000008139 complexing agent Substances 0.000 claims abstract description 55
- -1 iron ions Chemical class 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000012535 impurity Substances 0.000 claims abstract description 5
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims description 59
- 229910001447 ferric ion Inorganic materials 0.000 claims description 47
- 235000001014 amino acid Nutrition 0.000 claims description 35
- 150000001413 amino acids Chemical class 0.000 claims description 35
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 31
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 25
- 229920000642 polymer Polymers 0.000 claims description 11
- YMAWOPBAYDPSLA-UHFFFAOYSA-N glycylglycine Chemical compound [NH3+]CC(=O)NCC([O-])=O YMAWOPBAYDPSLA-UHFFFAOYSA-N 0.000 claims description 10
- ZDXPYRJPNDTMRX-UHFFFAOYSA-N glutamine Natural products OC(=O)C(N)CCC(N)=O ZDXPYRJPNDTMRX-UHFFFAOYSA-N 0.000 claims description 8
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 6
- 108010008488 Glycylglycine Proteins 0.000 claims description 5
- QNAYBMKLOCPYGJ-REOHCLBHSA-N L-alanine Chemical compound C[C@H](N)C(O)=O QNAYBMKLOCPYGJ-REOHCLBHSA-N 0.000 claims description 5
- 235000004279 alanine Nutrition 0.000 claims description 5
- 229940043257 glycylglycine Drugs 0.000 claims description 5
- MTCFGRXMJLQNBG-REOHCLBHSA-N (2S)-2-Amino-3-hydroxypropansäure Chemical compound OC[C@H](N)C(O)=O MTCFGRXMJLQNBG-REOHCLBHSA-N 0.000 claims description 3
- 239000004475 Arginine Substances 0.000 claims description 3
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 claims description 3
- 239000004471 Glycine Substances 0.000 claims description 3
- ODKSFYDXXFIFQN-BYPYZUCNSA-P L-argininium(2+) Chemical compound NC(=[NH2+])NCCC[C@H]([NH3+])C(O)=O ODKSFYDXXFIFQN-BYPYZUCNSA-P 0.000 claims description 3
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 claims description 3
- ZDXPYRJPNDTMRX-VKHMYHEASA-N L-glutamine Chemical compound OC(=O)[C@@H](N)CCC(N)=O ZDXPYRJPNDTMRX-VKHMYHEASA-N 0.000 claims description 3
- AYFVYJQAPQTCCC-GBXIJSLDSA-N L-threonine Chemical compound C[C@@H](O)[C@H](N)C(O)=O AYFVYJQAPQTCCC-GBXIJSLDSA-N 0.000 claims description 3
- MTCFGRXMJLQNBG-UHFFFAOYSA-N Serine Natural products OCC(N)C(O)=O MTCFGRXMJLQNBG-UHFFFAOYSA-N 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- AYFVYJQAPQTCCC-UHFFFAOYSA-N Threonine Natural products CC(O)C(N)C(O)=O AYFVYJQAPQTCCC-UHFFFAOYSA-N 0.000 claims description 3
- 239000004473 Threonine Substances 0.000 claims description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 3
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 3
- ODKSFYDXXFIFQN-UHFFFAOYSA-N arginine Natural products OC(=O)C(N)CCCNC(N)=N ODKSFYDXXFIFQN-UHFFFAOYSA-N 0.000 claims description 3
- 235000013922 glutamic acid Nutrition 0.000 claims description 3
- 239000004220 glutamic acid Substances 0.000 claims description 3
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 3
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 3
- 235000011151 potassium sulphates Nutrition 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 238000007747 plating Methods 0.000 abstract description 149
- 239000010802 sludge Substances 0.000 abstract description 46
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 239000000243 solution Substances 0.000 description 93
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 24
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 230000007423 decrease Effects 0.000 description 11
- 239000002994 raw material Substances 0.000 description 10
- 230000002829 reductive effect Effects 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 8
- 235000015165 citric acid Nutrition 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 7
- 229910021645 metal ion Inorganic materials 0.000 description 7
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical class [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 6
- 238000010924 continuous production Methods 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 5
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 4
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 4
- 239000010953 base metal Substances 0.000 description 4
- 150000001768 cations Chemical class 0.000 description 4
- 239000010960 cold rolled steel Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000000174 gluconic acid Substances 0.000 description 4
- 235000012208 gluconic acid Nutrition 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 229910000358 iron sulfate Inorganic materials 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 235000010323 ascorbic acid Nutrition 0.000 description 2
- 239000011668 ascorbic acid Substances 0.000 description 2
- 229960005070 ascorbic acid Drugs 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 235000014413 iron hydroxide Nutrition 0.000 description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical class [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 2
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 2
- 239000006174 pH buffer Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- SBJKKFFYIZUCET-JLAZNSOCSA-N Dehydro-L-ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(=O)C1=O SBJKKFFYIZUCET-JLAZNSOCSA-N 0.000 description 1
- SBJKKFFYIZUCET-UHFFFAOYSA-N Dehydroascorbic acid Natural products OCC(O)C1OC(=O)C(=O)C1=O SBJKKFFYIZUCET-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 235000020960 dehydroascorbic acid Nutrition 0.000 description 1
- 239000011615 dehydroascorbic acid Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- C25D3/20—Electroplating: Baths therefor from solutions of iron
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the present invention relates to an iron electroplating solution and an electroplated steel sheet manufactured using the same, and more particularly, has excellent electroplating efficiency and plating adhesion, and does not generate sludge even when electroplating at high current density over a long period of time It relates to an iron electroplating solution and an electroplated steel sheet manufactured using the same.
- Steel sheet has excellent mechanical strength, good workability, and abundant resources, so it is widely used as a structural material for automobiles, home appliances, and building materials. are extending
- iron is a material that is manufactured from steel sheet or steel and used as a general structural material.
- it since it has poor corrosion resistance and appearance properties compared to other metals, it is used for the purpose of utilizing magnetic properties or forming special-purpose alloys. plating was carried out.
- iron has extremely low plating efficiency in the electroplating process, and sludge is generated during long-term use, so it is very difficult to apply industrially.
- Patent Document 1 discloses an iron plating solution for a base of an electrogalvanized steel sheet.
- complexing agents such as gluconic acid, nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA), and citric acid are used to prevent sludge.
- NTA nitrilotriacetic acid
- EDTA ethylenediaminetetraacetic acid
- citric acid citric acid
- Patent Document 2 Patent Document 3, and Patent Document 4 also tried to prevent sludge by using carboxylic acids such as gluconic acid, tartaric acid, citric acid, and dicarboxylic acid as a complexing agent. There is a problem in that the plating layer is easily removed. On the other hand, when ascorbic acid is used, it is possible to temporarily prevent sludge because it serves to reduce ferric ions to ferrous ions, but when ascorbic acid is oxidized to produce dehydroascorbic acid, it is complexed with iron ions. It is not suitable for continuous operation because it sharply lowers the electroplating efficiency.
- carboxylic acids such as gluconic acid, tartaric acid, citric acid, and dicarboxylic acid
- the conventional iron plating solution contains ferrous ions (Fe 2+ ), but when it is oxidized to ferric ions (Fe 3+ ) during the continuous electroplating process, the plating efficiency is rapidly reduced and sludge is generated. There is a problem being Therefore, the ferric ions must be reduced to ferrous ions or the solution must be periodically replaced, which is difficult to apply in a large-scale continuous electroplating process.
- a method of inhibiting the formation of ferric iron in a solution by using a soluble anode has been proposed, but since the soluble anode is gradually dissolved and consumed as plating proceeds, the inter-electrode distance and surface condition change as well as periodically replace it. It is very difficult to manage because it has to be given.
- An object of the present invention is to provide a non-iron electroplating solution and an electroplated steel sheet manufactured using the same.
- iron ions including ferrous ions and ferric ions; complexing agent; and unavoidable impurities, wherein the content of ferric ions in the iron ions is 5 to 60 wt%.
- the iron ion concentration may be 1 to 80 g per 1 liter of the iron electroplating solution.
- the molar concentration ratio of the iron ion and the complexing agent may be 1: 0.05 to 2.0.
- the complexing agent may be at least one selected from amino acids and amino acid polymers.
- the complexing agent may be at least one selected from alanine, glycine, serine, threonine, arginine, glutamine, glutamic acid and glycylglycine.
- the iron electroplating solution may have a pH of 1.2 to 4.0.
- 200 g or less of a conduction aid per 1 liter of the iron electroplating solution may be additionally included.
- the conduction aid may be at least one selected from sodium sulfate, potassium sulfate and ammonium sulfate.
- a plated steel sheet plated with iron with the iron electroplating solution there is provided a plated steel sheet plated with iron with the iron electroplating solution.
- the electroplating efficiency is high, the plating efficiency does not decrease due to the continuous plating operation, and the sludge generation is prevented, so that the plating solution management is easy.
- the plating solution since the concentration of ferric ions generated by the plating reaction is maintained constant, the plating solution does not need to be replaced, so it is suitable for a continuous plating process.
- Example 1 is an initial scanning electron microscope photograph of a specimen plated for 0.7 seconds at a current density of 50 A/dm 2 using the plating solution of Example 3.
- Figure 2 is a final scanning electron microscope photograph of a specimen plated for 0.7 seconds at a current density of 50 A/dm 2 using the plating solution of Example 3.
- the present invention relates to an iron electroplating solution and an electroplated steel sheet manufactured using the same, and more particularly, has excellent electroplating efficiency and plating adhesion, and does not generate sludge even when electroplating at high current density over a long period of time It relates to an iron electroplating solution and an electroplated steel sheet manufactured using the same.
- Electroplating is used as a method of forming a uniform and pure iron plating layer in a continuous plating process.
- iron can exist as a ferrous ion (Fe 2+ ), which is a divalent ion, and a ferric ion (Fe3 + ), which is a trivalent ion, and the ferric ion is easily produced even in an acidic solution with a pH of 2 or higher. sludge is formed.
- ferric ions are naturally formed in the solution when they come into contact with atmospheric oxygen or oxygen generated during the electroplating process.
- ferrous ions are directly oxidized to ferric ions by the oxidation reaction of the anode. If a soluble anode is used to suppress this, oxidation of iron ions can be somewhat suppressed, but iron ion oxidation cannot be fundamentally suppressed. Therefore, when ferric iron is formed, a filtration device for removing sludge is essential, and since the electrolyte must be periodically replaced to remove accumulated ferric ions, raw materials are inevitably wasted.
- the complexing agent refers to a substance that strongly bonds with metal ions in an aqueous solution to form complex ions, which inhibits the binding of hydroxide ions (OH ⁇ ) with metal ions in water to prevent sludge generation.
- the bond between the complexing agent and the metal ion is weak compared to the bond between the hydroxide ion and the metal ion, it cannot serve as a complexing agent for sludge prevention, whereas if the bond between the complexing agent and the metal ion is too strong, sludge generation is prevented, but the plating process The separation of the complexing agent and the metal ion becomes difficult in the metal ion, which increases the plating overvoltage, so there is a problem in that the plating efficiency is lowered.
- chelating molecules as an effective organic complexing agent for preventing sludge in solution is conceivable.
- Representative chelates include oxalic acid and citric acid containing two or more carboxyl groups in one molecule, and NTA and EDTA containing a plurality of carboxyl groups and amines. Since two or more carboxyl groups in one complexing agent molecule form a strong bond with iron ions, a complexing agent containing a plurality of carboxyl groups can inhibit sludge generation by inhibiting the binding of iron ions with hydroxide ions. Since it becomes difficult to separate iron ions and complexing agent molecules in the process, as described above, there is a problem of a decrease in plating efficiency due to an increase in plating overvoltage.
- the carboxyl group dissociates hydrogen in weak acidity to form a negative charge.
- a complexing agent having two or more carboxyl groups forms monovalent or divalent anions in the pH 2 to 4 region, and the complexing agent and iron ions are combined The resulting complex ion also has a negative charge.
- an electrical repulsive force is generated with the cathode where the electroplating reaction occurs, making mass transfer difficult and plating efficiency lowered. The easier it is, the more ferric ions are weighted.
- ferric ions have a much stronger binding force with the complexing agent than ferrous ions, ferric ions generated in the solution do not form sludge, but are not used at all in the plating reaction and accumulate. Therefore, when plating is carried out in a continuous process for a long time, only the concentration of ferrous ions participating in the plating reaction is sharply lowered and the concentration of ferric ions increases, so the plating efficiency is lowered to obtain the target level of plating. Since the plating quality is deteriorated due to burning, the solution must be replaced periodically, and raw material waste is severe.
- the present inventors have conducted research to solve the above problems, and when a certain level of ferric ions are included in the iron electroplating solution, the ferrous ions are oxidized at the anode to suppress the formation of ferric ions. , the cathode accelerates the reaction of ferric ions to ferrous ions, so ferric ions can be used as raw materials for iron electroplating, and the pH and ferric concentration change are small, so Since the state does not change significantly, the plating efficiency can be secured even after long-term use, and when amino acids or amino acid polymers are used as complexing agents in the electrolyte for iron electroplating, high plating efficiency while suppressing the generation of sludge due to the formation of ferric iron It was found that it was possible to obtain the present invention was completed.
- ferrous iron is oxidized to ferric iron to suppress the formation of sludge, and at the same time, by reusing ferric ions as a raw material for iron plating, the deterioration of the solution is suppressed and constant plating is performed. efficiency can be maintained.
- iron ions including ferrous ions and ferric ions; complexing agent; and unavoidable impurities, wherein the content of ferric ions in the iron ions is 5 to 60 wt%.
- the unavoidable impurity means, for example, an alloy component such as manganese or silicon eluted from the steel sheet or a component contained in a solution raw material.
- the iron electroplating solution contains ferrous ions and ferric ions.
- ferrous ions In order to obtain high plating efficiency, it may be advantageous to include only ferrous ions.
- the solution deteriorates and the plating efficiency rapidly decreases, which is preferable because it causes quality deviation in the continuous electroplating process. can't
- the content of ferric ions among the iron ions is preferably 5 to 60% by weight, more preferably 5 to 40% by weight.
- the rate at which ferric iron is reduced to ferrous iron at the cathode is smaller than the rate at which ferrous iron is oxidized to ferric iron at the anode, so that the ferric concentration sharply rises and the pH sharply drops, resulting in a decrease in plating efficiency. continuously degraded.
- the concentration of ferric ions exceeds 60%, the reaction amount of ferric iron to ferrous iron at the cathode increases significantly than the reaction amount in which ferrous iron is reduced and precipitated as metallic iron, so the plating efficiency decreases.
- the content of ferric ions in the iron ions is 5 to 60 wt% It is preferable to become
- a method such as dissolving pure metallic iron, iron oxide or iron hydroxide in high concentration of sulfuric acid or mixing and dissolving a ferrous sulfate salt and a ferric sulfate salt can be used. , but is not limited to the above raw materials and methods.
- an iron electroplating solution containing ferric ions a sulfate, iron oxide, iron hydroxide, etc. containing ferric iron are mixed and dissolved, or a sulfuric acid-based electrolyte containing only ferrous iron is prepared and then hydrogen peroxide, etc.
- Sulfuric acid-based plating solution (electrolyte solution) including ferric iron can be prepared by oxidizing by inputting an oxidizing agent or by injecting air, or by applying an anode to electrically oxidize, but is not limited thereto.
- the iron ion concentration is preferably 1 to 80 g per 1 liter of the iron electroplating solution, and more preferably 10 to 50 g per 1 liter. If it is less than 1g/L, there is a problem that plating efficiency and plating quality are rapidly reduced. On the other hand, if it exceeds 80g/L, solubility may be exceeded and precipitation may occur, and loss of raw materials due to solution loss in the continuous plating process increase, so it is not economical.
- the iron electroplating solution of the present invention contains a complexing agent. It is preferable to use an amino acid or an amino acid polymer as a complexing agent in order to not generate sludge while containing a large amount of ferric iron and to maintain high plating efficiency.
- Amino acid refers to an organic molecule in which a carboxyl group (-COOH) and an amine group (-NH 2 ) are bonded
- an amino acid polymer refers to an organic molecule formed by polymerization of two or more amino acids
- an amino acid polymer is a complexing agent similar to an amino acid. indicates characteristics. Therefore, in the following description, amino acids and amino acid polymers are collectively referred to as amino acids.
- the amine When an amino acid is dissolved in neutral water, the amine binds to a hydrogen ion and has a positive charge, and the carboxyl group has a negative charge because the hydrogen ion is dissociated, so that the amino acid molecule maintains charge neutrality.
- the carboxyl group When the solution is acidified, the carboxyl group recombines with the hydrogen ion to become charge neutral, and the amine has a positive charge, so the amino acid molecule forms a cation. That is, amino acids form charge neutral or cations in weakly acidic aqueous solutions.
- a conventional complexing agent having a plurality of carboxyl groups exhibits a characteristic electrically opposite to that of a negative charge in a weakly acidic aqueous solution.
- amino acids form fewer bonds with iron ions than complexing agents containing a plurality of carboxyl groups, such as citric acid and EDTA, and have weak binding force, but have sufficiently strong binding force with ferric ions that generate sludge. Precipitation by ions can be prevented.
- the ferric ions are easily transferred to the anode and are reduced to ferrous ions to participate in the plating reaction, while movement to the anode is inhibited to prevent the ferric ions from moving to the anode. Since the rate of generation of ions is slowed, the concentration of ferric ions is maintained at a constant level even when continuous plating is performed for a long period of time, the plating efficiency is maintained constant, and there is no need to replace the electrolyte.
- the complexing agent is preferably added in an amount such that the molar concentration ratio of the iron ion to the complexing agent is 1: 0.05 to 2.0, and more preferably 1: 0.5 to 1.0. If it is less than 0.05, the excessively contained ferric ions cannot be combined with hydroxide ions or oxygen to inhibit the formation of sludge, and even if ferric is not included, the plating efficiency is greatly reduced, and further, it causes burning, resulting in plating quality this gets worse On the other hand, even if it exceeds 2.0, the sludge suppression effect and plating quality are maintained, but the plating efficiency is lowered due to an increase in overvoltage, and the relatively expensive amino acids compared to raw materials containing iron ions such as iron sulfate are included unnecessarily and excessively. It is not economical because the cost increases.
- the complexing agent is preferably at least one selected from amino acids or amino acid polymers, and for example, may be at least one selected from alanine, glycine, serine, threonine, arginine, glutamine, glutamic acid and glycylglycine.
- the pH of the iron electroplating solution is preferably 1.2 to 6.0, more preferably 2 to 4.
- the pH is less than 1.2, the reduction reaction of hydrogen ions rapidly decreases and the electroplating efficiency is sharply reduced, whereas when the pH exceeds 6, the ferrous ions also form sludge, so that even if a large amount of complexing agent is contained, the solution It becomes difficult to keep clean.
- the pH is 4 to 6, although the solution itself may be kept clean while electroplating is not performed, sludge may be temporarily generated during the plating process by applying electricity, which may cause turbidity.
- the pH adjustment may be acid and alkali solutions including sulfuric acid, sodium hydroxide, potassium hydroxide, ammonia, and the like, but is not limited thereto.
- the iron electroplating solution may further contain 200 g or less of a conduction aid (except 0) per 1 liter of the iron electroplating solution.
- a conduction aid except 0
- the iron ion concentration is low, the pH is high, and a high current operation is required, a plating voltage can be reduced by using a conductive aid.
- it exceeds 200 g/L the conductivity does not increase significantly and the specific gravity of the solution increases, which is unfavorable to solution circulation and precipitation may occur at low temperatures. desirable.
- the type of the conduction aid is not specifically limited, but, for example, at least one selected from sodium sulfate, potassium sulfate, and ammonium sulfate may be used.
- an iron-plated steel sheet plated with the iron electroplating solution plated with the iron electroplating solution.
- the iron electroplating solution at a temperature of 80° C. or less and a current density of 0.5 to 150 A/dm 2 , high electroplating efficiency can be maintained without sludge generation, and a high-quality iron plating layer is formed.
- An iron-coated steel sheet can be obtained.
- Ferrous sulfate and ferric sulfate were used to prepare the iron plating solution.
- One of amino acids was selected as the complexing agent, and the concentration of the complexing agent was dissolved by calculating the weight in a molar concentration ratio according to the iron ion concentration.
- the pH of the solution was adjusted using sulfuric acid or sodium hydroxide.
- a complexing agent and a conduction aid were first dissolved in pure water, and then iron sulfate was added.
- iron sulfate is first dissolved, sludge is generated during the dissolution process, and since the sludge is not easily dissolved even if a complexing agent is added thereafter, iron sulfate is preferably added after the complexing agent is completely dissolved.
- Copper plate and cold rolled steel plate were used as the base metal.
- the surface of the metal base was washed with alcohol, degreased under normal alkaline degreasing conditions, immersed in 1 to 5% sulfuric acid solution within about 10 seconds, and then pickled, washed with pure water and then plated.
- the iron plating solution of the present invention is designed to be used for a long time in a continuous process as well as the plating efficiency immediately after the solution is prepared and whether sludge is generated, iron ions are consumed in a continuous process by a certain amount or more, and the pH decreases,
- the electroplating efficiency and the generation of sludge when the solution is denatured such as when a significant amount of ferrous ions are oxidized to ferric iron
- step 1 each solution was prepared and the temperature was raised, and after connecting a rectifier to the base metal and the positive electrode plate, the current density and plating time were controlled to prepare a plating specimen in the initial plating solution. Copper plate and cold-rolled steel plate were used as the base metal, and the plating efficiency was measured from the result of plating on the copper plate, and the plating adhesion was evaluated from the result of plating on the cold-rolled steel sheet.
- the plating layer was dissolved in a sample plated on a copper plate with a hydrochloric acid solution, and the total amount of iron components in the solution was measured to calculate the plating amount, which was expressed as the initial plating efficiency.
- step 2 in order to confirm the change in the properties of the solution when electroplating with the above solution for a long period of time, the total amount of current in which 10% of the total amount of iron ions contained in the plating solution can be precipitated was calculated and the current was continuously applied, The city metal was replaced periodically.
- step 3 a plating specimen was prepared in the same manner as in step 1 using a solution denatured by applying an electric current for a long time, and plating quality and final plating efficiency were measured.
- the surface shape of the iron plating layer obtained by using a cold-rolled steel sheet as a base metal was analyzed using a scanning electron microscope, and whether the plating layer fell off using a tape on the surface of the plated specimen was visually confirmed. They are shown together, and the evaluation criteria are as follows.
- ⁇ The level at which the plating layer is dropped in the form of powder and can be checked with the naked eye
- Examples 1 to 4 and Comparative Example 1 show the results according to the iron ion concentration using glutamine, one of the amino acids, as a complexing agent.
- the concentration of glutamine was adjusted to be 0.5 times the iron ion concentration as a molar concentration ratio, the pH was adjusted to be 2 to 4, and the plating current density was 10 to 50A/dm 2 depending on the iron ion concentration in the solution.
- the plating current density was 10 to 50A/dm 2 depending on the iron ion concentration in the solution.
- the iron ion concentration was 1 g/L or more, the plating adhesion was good, sludge was not generated due to long-term use, and the plating efficiency tended to increase as the iron concentration increased.
- FIG. 1 shows an initial scanning electron microscope photograph of a specimen plated with a current density of 50 A/dm 2 , 0.7 seconds using the plating solution of Example 3.
- FIG. 2 is a scanning electron micrograph of the end of the specimen.
- the plating time is increased, the plating structure becomes denser and the plating is performed for more than 2.0 seconds.
- a dense plating layer was formed.
- Examples 8 to 11 and Comparative Example 4 used glutamine as a complexing agent, and showed plating efficiency and sludge generation according to the content of the complexing agent.
- Comparative Example 4 when the complexing agent concentration is 0.01 or less compared to the molar concentration of iron, the plating efficiency is also low, sludge is easily generated during plating, and stable electroplating is difficult, such as the plating layer is also dropped.
- the molar concentration was 0.05 or more, the plating efficiency was high, and no sludge was generated.
- Examples 12 to 16 show the results of measuring plating efficiency using glycylglycine, a kind of amino acid polymer, as a complexing agent. In the initial stage as well as in a sufficiently denatured solution, the plating efficiency was good, and no sludge was generated.
- electroplating was performed by adjusting the pH of the iron electroplating solution to 1 to 6.
- the iron electroplating solution having a pH of less than 1.2 was very stable and could maintain cleanliness, but the plating efficiency was too low.
- the plating efficiency gradually increased as the pH increased.
- the pH exceeded 4 the cleanliness of the solution was maintained while not plating, but a small amount of precipitate was generated during the continuous plating process, and most of them were dissolved when stirred.
- the pH exceeds 5 the precipitate generated during the plating process is not naturally re-dissolved even with stirring, and the plating layer is easily removed and the plating efficiency is rather decreased.
- the plating efficiency was measured by changing the current density to 0.5 to 150A/dm 2 . As the current density was lower, the plating efficiency tended to decrease because hydrogen generation and side reactions in which ferric ions were reduced to ferrous ions were relatively increased compared to the current consumed in plating. On the other hand, the plating efficiency increased significantly as the current density increased up to the current density of 100A/dm 2 , and when the current density was increased to 150A/dm 2 beyond this, the plating efficiency decreased slightly, but the plating quality was still maintained while maintaining high plating efficiency. It was good, and no sludge was generated.
- Example 24 alanine, a type of amino acid, was used as a complexing agent, and in Comparative Examples 7 and 8, electroplating was performed with a solution prepared using citric acid and gluconic acid having only carboxyl groups in the molecule as complexing agents.
- the plating efficiency at the initial and late stages similar to that when glutamine, an amino acid, or glycylglycine, a type of amino acid polymer, was used as a complexing agent was obtained, and no sludge was generated during the plating process.
- citric acid and gluconic acid were used as complexing agents, although sludge was not generated, the initial plating efficiency was very low, and the plating layer was easily removed so that good plating quality could not be obtained. decreased sharply.
- FIG. 3 shows a photograph of a specimen plated with the solution of Comparative Example 7 using citric acid as a complexing agent observed with a scanning electron microscope.
- the plating structure obtained from the iron plating solution containing citric acid was plated with very fine and coarse particles, and the plating layer contained a very large amount of hydroxide.
- a solution containing an amino acid or an amino acid polymer as a complexing agent is different from a plating solution using a carboxylic acid complexing agent, which is a commonly used complexing agent, preventing the mixing of hydroxides and suppressing burning to obtain a high-quality plating layer.
- a carboxylic acid complexing agent which is a commonly used complexing agent, preventing the mixing of hydroxides and suppressing burning to obtain a high-quality plating layer.
- the electroplating efficiency is high, the plating efficiency is maintained even after long-term use, and sludge generation is suppressed, it is expected that high-speed continuous operation is possible.
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Abstract
Description
Claims (9)
- 제1철 이온 및 제2철 이온을 포함하는 철 이온; 착화제; 및 불가피한 불순물을 포함하며,상기 철 이온 중 제2철 이온의 함량은 5 내지 60 중량%인 철 전기도금용액.
- 제1항에 있어서,상기 철 이온의 농도가 상기 철 전기도금용액 1ℓ당 1 내지 80g인 것을 특징으로 하는 철 전기도금용액.
- 제1항에 있어서,상기 철 이온과 착화제의 몰 농도비는 1: 0.05 내지 2.0인 것을 특징으로 하는 철 전기도금용액.
- 제1항에 있어서,상기 착화제가 아미노산 및 아미노산 중합체 중에서 선택된 1종 이상인 것을 특징으로 하는 철 전기도금용액.
- 제1항에 있어서,상기 착화제가 알라닌, 글리신, 세린, 트레오닌, 아르기닌, 글루타민, 글루탐산 및 글리실글리신 중에서 선택된 1종 이상인 것을 특징으로 하는 철 전기도금용액.
- 제1항에 있어서,상기 철 전기도금용액의 pH가 1.2 내지 4.0인 것을 특징으로 하는 철 전기도금용액.
- 제1항에 있어서,상기 철 전기도금용액 1ℓ당 200g 이하(단, 0은 제외)의 전도보조제를 추가로 포함하는 것을 특징으로 하는 철 전기도금용액.
- 제7항에 있어서,상기 전도보조제가 황산나트륨, 황산칼륨 및 황산암모늄 중에서 선택된 1종 이상인 것을 특징으로 하는 철 전기도금용액.
- 제1항 내지 제8항 중 어느 한 항에 따른 철 전기도금용액으로 도금된 도금 강판.
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CN202080107937.2A CN116568870A (zh) | 2020-12-14 | 2020-12-14 | 铁电镀溶液及利用该铁电镀溶液制造的电镀钢板 |
US18/267,010 US20240044032A1 (en) | 2020-12-14 | 2020-12-14 | Solution for electroplating iron, and electroplated steel sheet manufactured by using same |
PCT/KR2020/018283 WO2022131386A1 (ko) | 2020-12-14 | 2020-12-14 | 철 전기도금용액 및 이를 이용하여 제조된 전기도금 강판 |
JP2023536012A JP2023553487A (ja) | 2020-12-14 | 2020-12-14 | 鉄電気めっき溶液及びこれを用いて製造された電気めっき鋼板 |
EP20966040.6A EP4261328A4 (en) | 2020-12-14 | 2020-12-14 | SOLUTION FOR ELECTROPLATED IRON AND ELECTROPLATED STEEL SHEET PRODUCED THEREFROM |
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- 2020-12-14 JP JP2023536012A patent/JP2023553487A/ja active Pending
- 2020-12-14 WO PCT/KR2020/018283 patent/WO2022131386A1/ko active Application Filing
- 2020-12-14 EP EP20966040.6A patent/EP4261328A4/en active Pending
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