CN117265603A - Galvanized brightening agent composition for ship corrosion prevention and preparation method thereof - Google Patents
Galvanized brightening agent composition for ship corrosion prevention and preparation method thereof Download PDFInfo
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- CN117265603A CN117265603A CN202211195627.8A CN202211195627A CN117265603A CN 117265603 A CN117265603 A CN 117265603A CN 202211195627 A CN202211195627 A CN 202211195627A CN 117265603 A CN117265603 A CN 117265603A
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- galvanized
- brightening agent
- polyoxyethylene ether
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- alcohol polyoxyethylene
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- 238000005282 brightening Methods 0.000 title claims abstract description 54
- 239000000203 mixture Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000005536 corrosion prevention Methods 0.000 title abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000009713 electroplating Methods 0.000 claims abstract description 27
- LXNHXLLTXMVWPM-UHFFFAOYSA-N pyridoxine Chemical compound CC1=NC=C(CO)C(CO)=C1O LXNHXLLTXMVWPM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005238 degreasing Methods 0.000 claims abstract description 20
- BWHOZHOGCMHOBV-UHFFFAOYSA-N Benzalacetone Natural products CC(=O)C=CC1=CC=CC=C1 BWHOZHOGCMHOBV-UHFFFAOYSA-N 0.000 claims abstract description 14
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000012964 benzotriazole Substances 0.000 claims abstract description 14
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims abstract description 14
- 235000010234 sodium benzoate Nutrition 0.000 claims abstract description 14
- 239000004299 sodium benzoate Substances 0.000 claims abstract description 14
- BWHOZHOGCMHOBV-BQYQJAHWSA-N trans-benzylideneacetone Chemical compound CC(=O)\C=C\C1=CC=CC=C1 BWHOZHOGCMHOBV-BQYQJAHWSA-N 0.000 claims abstract description 14
- FPYUJUBAXZAQNL-UHFFFAOYSA-N 2-chlorobenzaldehyde Chemical compound ClC1=CC=CC=C1C=O FPYUJUBAXZAQNL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 235000008160 pyridoxine Nutrition 0.000 claims abstract description 13
- 239000011677 pyridoxine Substances 0.000 claims abstract description 13
- 229940011671 vitamin b6 Drugs 0.000 claims abstract description 13
- UFIVEPVSAGBUSI-REOHCLBHSA-N (S)-dihydroorotic acid Chemical compound OC(=O)[C@@H]1CC(=O)NC(=O)N1 UFIVEPVSAGBUSI-REOHCLBHSA-N 0.000 claims abstract description 12
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 7
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000005498 polishing Methods 0.000 claims abstract description 4
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 45
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 45
- 239000008367 deionised water Substances 0.000 claims description 23
- 229910021641 deionized water Inorganic materials 0.000 claims description 23
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 19
- RZXLPPRPEOUENN-UHFFFAOYSA-N Chlorfenson Chemical compound C1=CC(Cl)=CC=C1OS(=O)(=O)C1=CC=C(Cl)C=C1 RZXLPPRPEOUENN-UHFFFAOYSA-N 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000013527 degreasing agent Substances 0.000 claims description 14
- 238000005237 degreasing agent Methods 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 5
- KJIOQYGWTQBHNH-UHFFFAOYSA-N undecanol Chemical compound CCCCCCCCCCCO KJIOQYGWTQBHNH-UHFFFAOYSA-N 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- XFRVVPUIAFSTFO-UHFFFAOYSA-N 1-Tridecanol Chemical compound CCCCCCCCCCCCCO XFRVVPUIAFSTFO-UHFFFAOYSA-N 0.000 claims description 2
- BVTJGGGYKAMDBN-UHFFFAOYSA-N Dioxetane Chemical compound C1COO1 BVTJGGGYKAMDBN-UHFFFAOYSA-N 0.000 claims description 2
- 125000000373 fatty alcohol group Chemical group 0.000 claims description 2
- 150000002191 fatty alcohols Chemical class 0.000 claims description 2
- 229940087291 tridecyl alcohol Drugs 0.000 claims description 2
- 229940057402 undecyl alcohol Drugs 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 3
- 238000005246 galvanizing Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 18
- 238000005260 corrosion Methods 0.000 abstract description 18
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000004381 surface treatment Methods 0.000 abstract description 3
- 238000007747 plating Methods 0.000 description 37
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 30
- 239000000243 solution Substances 0.000 description 27
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 24
- 229910052725 zinc Inorganic materials 0.000 description 24
- 239000011701 zinc Substances 0.000 description 24
- 238000003756 stirring Methods 0.000 description 21
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 20
- 238000012360 testing method Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 16
- 230000010287 polarization Effects 0.000 description 15
- 239000010960 cold rolled steel Substances 0.000 description 13
- UDIPTWFVPPPURJ-UHFFFAOYSA-M Cyclamate Chemical compound [Na+].[O-]S(=O)(=O)NC1CCCCC1 UDIPTWFVPPPURJ-UHFFFAOYSA-M 0.000 description 12
- KEZYHIPQRGTUDU-UHFFFAOYSA-N 2-[dithiocarboxy(methyl)amino]acetic acid Chemical compound SC(=S)N(C)CC(O)=O KEZYHIPQRGTUDU-UHFFFAOYSA-N 0.000 description 11
- 239000013530 defoamer Substances 0.000 description 11
- SJWFXCIHNDVPSH-UHFFFAOYSA-N octan-2-ol Chemical compound CCCCCCC(C)O SJWFXCIHNDVPSH-UHFFFAOYSA-N 0.000 description 11
- 239000004094 surface-active agent Substances 0.000 description 11
- ODLHGICHYURWBS-LKONHMLTSA-N trappsol cyclo Chemical compound CC(O)COC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](COCC(C)O)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](COCC(C)O)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](COCC(C)O)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](COCC(C)O)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)COCC(O)C)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1COCC(C)O ODLHGICHYURWBS-LKONHMLTSA-N 0.000 description 11
- 229910000029 sodium carbonate Inorganic materials 0.000 description 10
- 239000002518 antifoaming agent Substances 0.000 description 9
- 239000004721 Polyphenylene oxide Substances 0.000 description 8
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
- 229920000570 polyether Polymers 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 8
- 229920001296 polysiloxane Polymers 0.000 description 8
- 238000000576 coating method Methods 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- -1 polyoxyethylene Polymers 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000001103 potassium chloride Substances 0.000 description 4
- 235000011164 potassium chloride Nutrition 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 108010010803 Gelatin Proteins 0.000 description 2
- PVNIIMVLHYAWGP-UHFFFAOYSA-N Niacin Chemical compound OC(=O)C1=CC=CN=C1 PVNIIMVLHYAWGP-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- KBPLFHHGFOOTCA-UHFFFAOYSA-N caprylic alcohol Natural products CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- PXQPEWDEAKTCGB-UHFFFAOYSA-N orotic acid Chemical compound OC(=O)C1=CC(=O)NC(=O)N1 PXQPEWDEAKTCGB-UHFFFAOYSA-N 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- WBYWAXJHAXSJNI-VOTSOKGWSA-M .beta-Phenylacrylic acid Natural products [O-]C(=O)\C=C\C1=CC=CC=C1 WBYWAXJHAXSJNI-VOTSOKGWSA-M 0.000 description 1
- WBYWAXJHAXSJNI-SREVYHEPSA-N Cinnamic acid Chemical compound OC(=O)\C=C/C1=CC=CC=C1 WBYWAXJHAXSJNI-SREVYHEPSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 241000519995 Stachys sylvatica Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- 229930016911 cinnamic acid Natural products 0.000 description 1
- 235000013985 cinnamic acid Nutrition 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- WBYWAXJHAXSJNI-UHFFFAOYSA-N methyl p-hydroxycinnamate Natural products OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229960003512 nicotinic acid Drugs 0.000 description 1
- 235000001968 nicotinic acid Nutrition 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229960005010 orotic acid Drugs 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000015424 sodium Nutrition 0.000 description 1
- 229960003885 sodium benzoate Drugs 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/22—Electroplating: Baths therefor from solutions of zinc
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—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
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
Abstract
The invention provides a galvanized brightening agent composition for ship corrosion prevention and a preparation method thereof, belonging to the field of metal corrosion protection and surface treatment. The brightening agent for the galvanized composition provided by the invention comprises an anionic surfactant, a nonionic surfactant, benzalacetone, o-chlorobenzaldehyde, sodium benzoate, L-4, 5-dihydro-orotic acid, pyridoxine and benzotriazole. The preparation method of the galvanized sheet for the ship provided by the invention comprises the following steps: pretreating the cold-rolled sheet, degreasing, preparing electroplating liquid for electroplating, polishing, washing with water and drying. Therefore, the brightening agent for the galvanized composition and the preparation method thereof have the advantages of being low in cost and capable of effectively improving the dispersing capacity and the depth capacity of the galvanized liquid. The galvanized sheet for the ship and the preparation method thereof have the advantages of good glossiness, strong corrosion resistance and strong practicability.
Description
Technical Field
The invention belongs to the field of metal corrosion protection and surface treatment, and particularly relates to a galvanization brightening agent composition for ship corrosion prevention and a preparation method thereof.
Background
The ship is a transportation means capable of sailing or berthing in a water area for transportation or operation, and rapid development has been achieved in the years, however, due to the specificity (high humidity, high salt, etc.) of the surrounding environment of the ship, the service life of the metal materials of the ship is short. The galvanization is a surface treatment technology for plating a layer of zinc on the surface of metal, alloy or other materials to play roles of beautiful appearance, rust prevention and the like, can greatly prolong the service life, and is used for various industries.
At present, the combined brightening agent for the potassium chloride galvanization technology in China is mainly prepared from a proper amount of main brightening agent, carrier brightening agent and auxiliary brightening agent. The main brightening agent mainly uses benzalacetone as a main raw material; carrier brightening agents are commonly used such as OP-emulsifying agents, polyoxyethylene fatty alcohol ethers and the like; the auxiliary brightening agent is usually aromatic carboxylic acid, aromatic sulfonate and nitrogen-containing heterocyclic compound, such as cinnamic acid, sodium benzoate, sodium methylenedinaphthyl sulfonate, nicotinic acid, etc. The combined brightening agent is formed by mixing several brightening agents according to a certain proportion, and because of these auxiliary brightening agents and combined brightening agent, the current density and working temperature range are limited [ (A/d m) 2 ）1.5（0.5-2.0）]The current density is ultrahigh, and the coking and blackening rejection rate is higher when the plating part is passivated. Always puzzles engineering technicians, and needs improvement.
The prior art, such as Chinese patent publication No. CN 107400906B, discloses a high corrosion resistant galvanization brightening agent and a preparation method thereof. The high corrosion resistance galvanization brightening agent comprises the following components in parts by weight: 25-35 parts of anionic surfactant, 10-15 parts of nonionic surfactant, 1-2 parts of benzotriazole, 4-8 parts of NNF, 10-15 parts of brightening agent and 25-50 parts of water. The beneficial effects of the invention are as follows: the high corrosion-resistant zinc plating brightening agent can improve the corrosion resistance of the zinc plating layer, reduce oxidized white spots and prolong the maintenance time of the brightness of the surface of the zinc plating layer while improving the brightness of the zinc plating layer of metal.
Disclosure of Invention
The invention aims to provide a galvanization combined brightening agent and a preparation method thereof, which can improve the cathode polarization degree of a plating solution and improve the dispersion capacity and depth capacity of the plating solution.
The technical scheme adopted by the invention for achieving the purpose is as follows:
the preparation method of the galvanized composite brightening agent comprises the following steps:
dissolving anionic surfactant, nonionic surfactant, benzalacetone, o-chlorobenzaldehyde, sodium benzoate, L-4, 5-dihydro-orotic acid and pyridoxine in water, mixing uniformly, and adding benzotriazole dissolved in water at 90-100 ℃ to obtain the galvanized composite brightening agent.
In some specific embodiments, the anionic surfactant is an isomeric alcohol polyoxyethylene ether sulfonate.
In some specific embodiments, the nonionic surfactant is a fatty alcohol polyoxyethylene ether.
In some specific embodiments, the isomeric alcohol polyoxyethylene ether sulfonate is selected from one of isomeric decyl alcohol oxyethylene ether sulfonate, isomeric undecyl alcohol polyoxyethylene ether sulfonate and isomeric tridecyl alcohol polyoxyethylene ether sulfonate.
In some specific embodiments, the EO number of the isomeric alcohol polyoxyethylene ether sulfonates described above is an integer from 5 to 10.
In some specific embodiments, the fatty alcohol-polyoxyethylene ether is selected from one of n-octanol polyoxyethylene ether, n-hexanol polyoxyethylene ether, and n-decanol polyoxyethylene ether.
In some specific embodiments, the fatty alcohol-polyoxyethylene ether has an EO number of from 6 to 18.
In some specific embodiments, the galvanized composite brightening agent contains 150-180g/L of isomeric alcohol polyoxyethylene ether sulfonate, 60-80g/L of fatty alcohol polyoxyethylene ether, 18-25g/L of benzalacetone, 50-70g/L of o-chlorobenzaldehyde, 60-80g/L of sodium benzoate, 5-10g/L L-4, 5-dihydro orotic acid, 5-10g/L of pyridoxine and 4-8g/L of benzotriazole. The zinc plating combined brightening agent containing the L-4, 5-dihydro-orotic acid and pyridoxine components can increase the polarization degree of the zinc plating solution, enhance the dispersion capacity and depth capacity of the zinc plating solution, and the obtained zinc plating layer has fine and bright crystallization and lower internal stress of the plating layer. The galvanized layer has excellent ductility and binding force due to low stress, is suitable for parts which need bending and curling after plating, and has higher application prospect.
Provides a brightening agent for a galvanized composition, which is prepared by adopting the preparation method.
The invention further aims to provide the galvanized sheet for the ship and the preparation method thereof, and the galvanized sheet for the ship has the advantages of good glossiness, low internal stress, low porosity and good corrosion resistance.
The invention also provides a preparation method of the galvanized sheet for the ship, which comprises the following steps:
A. pretreatment: polishing the cold-rolled plate until the surface is flat and bright, flushing the cold-rolled plate with deionized water for 3-5 times, and then carrying out ultrasonic treatment with acetone for 20-40min;
B. degreasing: soaking the pretreated cold-rolled sheet with degreasing agent to remove fat, and then flushing with deionized water for 3-5 times;
C. electrogalvanizing: electroplating is carried out by adding an electroplating solution into the electroplating bath, wherein the electroplating solution comprises the following components: 180-210g/L KCl, 50-70g/L ZnCl 2 、25-40g/L H 3 BO 3 2-5ml/L of the brightening agent for the galvanized composition, and regulating the pH value to 5-5.8;
D. light emitting, water washing and drying.
In some specific embodiments, the degreasing agent comprises, in mass volume percent (g/mL): 3 to 8 percent of potassium hydroxide, 0.4 to 0.6 percent of sodium carbonate, 0.6 to 0.8 percent of sodium metasilicate pentahydrate, 1.0 to 1.5 percent of sec-octyl alcohol polyoxyethylene ether, 0.6 to 0.8 percent of degreasing surfactant and 0.4 to 0.6 percent of defoaming agent.
In some specific embodiments, the degreasing agent further comprises 0.2-0.4% sodium cyclohexylsulfamate, 0.1-0.3% hydroxypropyl-beta-cyclodextrin. The sodium cyclohexylsulfamate has a promoting effect on removing oil stains on the metal surface, can play a synergistic effect when the sodium cyclohexylsulfamate and the hydroxypropyl-beta-cyclodextrin coexist, further promotes the removal of the oil stains on the surface of a plating piece, is beneficial to the electroplating of the metal surface, reduces and prevents pinhole pits, and improves the corrosion resistance.
In some specific embodiments, the preparation method of the degreasing agent includes: adding deionized water into a beaker, adding potassium hydroxide into the deionized water while stirring to completely dissolve the deionized water, and then adding sodium carbonate while stirring; then adding sodium metasilicate pentahydrate, and stirring until the sodium metasilicate pentahydrate is completely dissolved; and adding the sec-octyl alcohol polyoxyethylene ether, the sodium cyclohexylsulfamate, the hydroxypropyl-beta-cyclodextrin and the degreasing surfactant in sequence, stirring until the sec-octyl alcohol polyoxyethylene ether, the sodium cyclohexylsulfamate, the hydroxypropyl-beta-cyclodextrin and the degreasing surfactant are completely dissolved, finally adding the defoaming agent, continuously stirring to enable the defoaming agent to be fully dissolved, and standing for standby.
In some specific embodiments, the step D specifically includes: the galvanized plate after the electroplating is taken out and immersed into the prepared dilute HNO with the concentration of 0.5 weight percent 3 And (3) continuously dissolving the yellow film layer on the surface of the galvanized sheet in the solution for 5-10s, taking out the galvanized sheet after the surface is observed to be silvery white and bright, washing the galvanized sheet with deionized water, and drying the galvanized sheet.
The galvanized sheet for the ship is prepared by adopting the preparation method.
The zinc plating combination brightening agent is prepared from anionic surfactant, nonionic surfactant, benzalacetone, o-chlorobenzaldehyde, sodium benzoate, orotic acid, pyridoxine and benzotriazole according to a certain proportion, so that the zinc plating combination brightening agent has the following beneficial effects: the polarization degree of the zinc plating solution can be increased, the dispersion capacity and the depth capacity of the zinc plating solution are enhanced, the obtained zinc plating layer is fine and bright in crystallization, and the internal stress of the plating layer is low. The galvanized layer has excellent ductility and binding force due to low stress, is suitable for parts which need bending and curling after plating, and has higher application prospect.
Therefore, the invention is a galvanization combined brightening agent with lower cost and capable of effectively improving the dispersion capacity and depth capacity of galvanization liquid and a preparation method thereof.
The galvanized sheet for the ship is prepared by adopting the galvanization combined brightening agent, so the galvanized sheet has the following beneficial effects: the prepared galvanized sheet has good glossiness, strong corrosion resistance, good ductility and binding force, improves the aesthetic degree of ships, prolongs the service life, and can be widely used for corrosion prevention of various parts of ships.
Therefore, the zinc plate for ship plating and the preparation method thereof have the advantages of good glossiness, strong corrosion resistance and strong practicability.
Drawings
FIG. 1 is a cathode polarization curve in test example 1 of the present invention;
FIG. 2 is a graph showing the dispersibility of the zinc plating bath prepared in the different examples of test example 1 according to the present invention;
FIG. 3 shows the covering power of the zinc plating bath prepared in the different examples of test example 1 according to the present invention;
FIG. 4 is a graph showing the gloss of galvanized sheet made in accordance with various examples of test example 1 of the present invention;
FIG. 5 is a measurement result of the contact angle of the surface of the cold rolled steel sheet after degreasing treatment in test example 1 of the present invention;
FIG. 6 is a measurement result of the porosity of the galvanized sheet in test example 1 according to the invention;
FIG. 7 is a graph showing the corrosion resistance time of the galvanized sheet in test example 1 according to the invention.
Detailed Description
The invention is described in further detail below with reference to examples:
example 1:
1. a method for preparing a galvanization combined brightening agent, which comprises the following steps:
160g of isomerism deca alcohol polyoxyethylene ether sulfonate (EO=8), 80g of normal decyl alcohol polyoxyethylene ether (EO=10), 20g of benzalacetone, 60g of o-chlorobenzaldehyde, 70g of sodium benzoate, 7g L-4, 5-dihydro-orotic acid and 5g of pyridoxine are dissolved in 750mL of water, and after being uniformly mixed, 4g of benzotriazole dissolved in 250mL of 100 ℃ water is added, and uniformly mixed, so that the galvanized composite brightening agent is obtained.
2. The preparation method of the galvanized sheet comprises the following steps:
2.1 pretreatment: cutting a cold-rolled steel plate into the size of 70mm multiplied by 40mm multiplied by 1mm, sequentially polishing the cold-rolled steel plate by 200-mesh, 500-mesh and 2000-mesh sand paper until the surface is smooth and bright, flushing the cold-rolled steel plate with deionized water for 3 times, and soaking the cold-rolled steel plate in acetone for ultrasonic treatment for 30min;
2.2 adding 5g of potassium hydroxide into 100mL of deionized water to dissolve completely, then adding 0.5g of sodium carbonate, stirring while adding, then adding 0.7g of sodium metasilicate pentahydrate, and stirring to dissolve completely; then, 1.3g of sec-octanol polyoxyethylene ether, 0.35g of sodium cyclohexylsulfamate, 0.22g of hydroxypropyl-beta-cyclodextrin and 0.6g of degreasing surfactant (RQ-322H of Rong strong technology Co., shenzhen, inc.) are sequentially added, stirred until the materials are completely dissolved, and finally, 0.5g of defoaming agent (Silok 4680 aqueous polyether silicone defoaming agent of Guangzhou St.Luo Ke Gao molecular polymer Co., ltd.) is added, and the materials are continuously stirred until the materials are completely dissolved, thereby obtaining the degreasing agent.
2.3 Taking out the cold-rolled steel plate from the acetone, soaking and degreasing the cold-rolled steel plate with a degreasing agent prepared by 2.2 at 50 ℃ for 3min, and then flushing the cold-rolled steel plate with deionized water for 3-5 times;
2.4 200g KCl, 60g ZnCl 2 、35g H 3 BO 3 Dissolving in deionized water, adding 3mL/L of the galvanization combined brightening agent prepared in the step 1, adding deionized water to supplement 1000mL, and regulating the pH value to 5 to obtain the electroplating solution.
2.5 pouring the prepared electroplating solution into an electroplating bath, starting electroplating after the temperature is raised to 25 ℃, regulating the output voltage to 5.0V by using an RS-1603DN adjustable direct current stabilized current power supply in the electroplating process, outputting the current of 0.55A, adopting a double positive electrode double-sided electroplating mode for electroplating, connecting a positive electrode lead to two zinc plates with 99% purity, connecting a negative electrode to a degreased cold-rolled steel plate, placing the electroplating solution into a self-made electroplating bath, fixing the positive electrode and the negative electrode, continuously bubbling the electroplating whole process by using a bubbling machine, ensuring that each ion of the electroplating solution can be uniformly distributed at each part of the electroplating bath, and setting the electroplating time to be 35min.
2.6, after electroplating, washing with deionized water, putting into dilute nitric acid solution with the concentration of 0.5wt% for 8s to carry out light emission, taking out after the surface presents bright luster, washing with deionized water, and drying to obtain the galvanized sheet.
Example 2:
1. a method for preparing a galvanization combined brightening agent, which comprises the following steps:
160g of isomerism deca alcohol polyoxyethylene ether sulfonate (EO=8), 80g of normal decyl alcohol polyoxyethylene ether (EO=10), 20g of benzalacetone, 60g of o-chlorobenzaldehyde, 70g of sodium benzoate, 7g L-4, 5-dihydro-orotic acid and 5g of pyridoxine are dissolved in 750mL of water, and after being uniformly mixed, 4g of benzotriazole dissolved in 250mL of 100 ℃ water is added, and uniformly mixed, so that the galvanized composite brightening agent is obtained.
2. A method for preparing a galvanized sheet, which is the same as in example 1.
Example 2:
1. a method for preparing a galvanization combined brightening agent, which comprises the following steps:
160g of isomerism deca alcohol polyoxyethylene ether sulfonate (EO=8), 80g of normal decyl alcohol polyoxyethylene ether (EO=10), 20g of benzalacetone, 60g of o-chlorobenzaldehyde, 70g of sodium benzoate, 7g L-4, 5-dihydro-orotic acid and 5g of pyridoxine are dissolved in 750mL of water, and after being uniformly mixed, 4g of benzotriazole dissolved in 250mL of 100 ℃ water is added, and uniformly mixed, so that the galvanized composite brightening agent is obtained.
2. A method for preparing a galvanized sheet, which is the same as in example 1.
Example 3:
1. a method for preparing a galvanization combined brightening agent, which comprises the following steps:
160g of isomerism deca alcohol polyoxyethylene ether sulfonate (EO=8), 80g of normal decyl alcohol polyoxyethylene ether (EO=10), 20g of benzalacetone, 60g of o-chlorobenzaldehyde, 70g of sodium benzoate, 7g L-4, 5-dihydro-orotic acid and 5g of pyridoxine are dissolved in 750mL of water, and after being uniformly mixed, 4g of benzotriazole dissolved in 250mL of 100 ℃ water is added, and uniformly mixed, so that the galvanized composite brightening agent is obtained.
2. A method for preparing a galvanized sheet, which is the same as in example 1.
Example 4:
1. a method for preparing a galvanization combined brightening agent, which comprises the following steps:
160g of isomerism deca alcohol polyoxyethylene ether sulfonate (EO=8), 80g of normal decyl alcohol polyoxyethylene ether (EO=10), 20g of benzalacetone, 60g of o-chlorobenzaldehyde, 70g of sodium benzoate and 5g of pyridoxine are dissolved in 750mL of water, and after being uniformly mixed, 4g of benzotriazole dissolved in 250mL of 100 ℃ water is added, and uniformly mixed, the galvanized composite brightening agent is obtained.
2. A method for preparing a galvanized sheet, which is the same as in example 1.
Example 5:
1. a method for preparing a galvanization combined brightening agent, which comprises the following steps:
160g of isomerism deca alcohol polyoxyethylene ether sulfonate (EO=8), 80g of normal decyl alcohol polyoxyethylene ether (EO=10), 20g of benzalacetone, 60g of o-chlorobenzaldehyde, 70g of sodium benzoate and 7g L-4, 5-dihydro orotic acid are dissolved in 750mL of water, and after being uniformly mixed, 4g of benzotriazole dissolved in 250mL of 100 ℃ water is added, and uniformly mixed, so that the galvanized composite brightening agent is obtained.
2. A method for preparing a galvanized sheet, which is the same as in example 1.
Example 6:
1. a method for preparing a galvanization combined brightening agent, which comprises the following steps:
160g of isomerism deca alcohol polyoxyethylene ether sulfonate (EO=8), 80g of normal decyl alcohol polyoxyethylene ether (EO=10), 20g of benzalacetone, 60g of o-chlorobenzaldehyde and 70g of sodium benzoate are dissolved in 750mL of water, and after being uniformly mixed, 4g of benzotriazole dissolved in 250mL of 100 ℃ water is added, and uniformly mixed, the galvanized composite brightening agent is obtained.
2. A method for preparing a galvanized sheet, which is the same as in example 1.
Example 7:
2.2 adding 5g of potassium hydroxide into 100mL of deionized water to dissolve completely, then adding 0.5g of sodium carbonate, stirring while adding, then adding 0.7g of sodium metasilicate pentahydrate, and stirring to dissolve completely; then, 1.3g of sec-octanol polyoxyethylene ether, 0.25g of sodium cyclohexylsulfamate, 0.2g of hydroxypropyl-beta-cyclodextrin and 0.6g of degreasing surfactant (RQ-322H of Rong strong technology Co., shenzhen) are sequentially added, stirred until the materials are completely dissolved, and finally, 0.5g of defoamer (Silok 4680 aqueous polyether silicone defoamer of Guangzhou Stokes Lo Ke Gao molecular polymer Co., silok) is added, and the mixture is continuously stirred until the materials are completely dissolved, so that a degreasing agent is obtained. The remainder is identical to example 1.
Example 8:
2.2 adding 5g of potassium hydroxide into 100mL of deionized water to dissolve completely, then adding 0.5g of sodium carbonate, stirring while adding, then adding 0.7g of sodium metasilicate pentahydrate, and stirring to dissolve completely; then, 1.3g of sec-octanol polyoxyethylene ether, 0.4g of sodium cyclohexylsulfamate, 0.2g of hydroxypropyl-beta-cyclodextrin and 0.6g of degreasing surfactant (RQ-322H of Rong strong science and technology Co., shenzhen) are sequentially added, stirred until the materials are completely dissolved, and finally, 0.5g of defoaming agent (Silok 4680 aqueous polyether silicone defoaming agent of Guangzhou St.Luo Ke Gao molecular polymer Co., ltd.) is added, and the materials are continuously stirred until the materials are completely dissolved, so that the degreasing agent is obtained. The remainder is identical to example 1.
Example 9:
2.2 adding 5g of potassium hydroxide into 100mL of deionized water to dissolve completely, then adding 0.5g of sodium carbonate, stirring while adding, then adding 0.7g of sodium metasilicate pentahydrate, and stirring to dissolve completely; then, 1.3g of sec-octanol polyoxyethylene ether, 0.6g of sodium cyclohexylsulfamate, 0.4g of hydroxypropyl-beta-cyclodextrin and 0.6g of degreasing surfactant (RQ-322H of Rong strong technology Co., shenzhen) are sequentially added, stirred until the materials are completely dissolved, and finally, 0.5g of defoamer (Silok 4680 aqueous polyether silicone defoamer of Guangzhou Stokes Luo Ke Gao molecular polymer Co., guangzhou) is added, and the materials are continuously stirred until the materials are completely dissolved, so that the degreasing agent is obtained. The remainder is identical to example 1.
Example 10:
2.2 adding 5g of potassium hydroxide into 100mL of deionized water to dissolve completely, then adding 0.5g of sodium carbonate, stirring while adding, then adding 0.7g of sodium metasilicate pentahydrate, and stirring to dissolve completely; then, 1.3g of sec-octanol polyoxyethylene ether, 0.1g of sodium cyclohexylsulfamate, 0.1g of hydroxypropyl-beta-cyclodextrin and 0.6g of degreasing surfactant (RQ-322H of Rong strong technology Co., shenzhen) are sequentially added, stirred until the materials are completely dissolved, and finally, 0.5g of defoamer (Silok 4680 aqueous polyether silicone defoamer of Guangzhou Stokes Luo Ke Gao molecular polymer Co., guangzhou) is added, and the materials are continuously stirred until the materials are completely dissolved, so that the degreasing agent is obtained. The remainder is identical to example 1.
Example 11:
2.2 adding 5g of potassium hydroxide into 100mL of deionized water to dissolve completely, then adding 0.5g of sodium carbonate, stirring while adding, then adding 0.7g of sodium metasilicate pentahydrate, and stirring to dissolve completely; then, 1.3g of sec-octanol polyoxyethylene ether, 0.22g of hydroxypropyl-beta-cyclodextrin and 0.6g of degreasing surfactant (RQ-322H of Shenzhen Rong strong science and technology Co., ltd.) are sequentially added, stirred until the mixture is completely dissolved, finally, 0.5g of defoaming agent (Silok 4680 aqueous polyether silicone defoaming agent of Guangzhou Stokes Luo Ke Gao molecular polymer Co., ltd.) is added, and the mixture is continuously stirred until the mixture is fully dissolved, thereby obtaining the degreasing agent. The remainder is identical to example 1.
Example 12:
2.2 adding 5g of potassium hydroxide into 100mL of deionized water to dissolve completely, then adding 0.5g of sodium carbonate, stirring while adding, then adding 0.7g of sodium metasilicate pentahydrate, and stirring to dissolve completely; then, 1.3g of sec-octanol polyoxyethylene ether, 0.35g of sodium cyclohexylsulfamate and 0.6g of degreasing surfactant (RQ-322H of Shenzhen Rong strong science and technology Co., ltd.) are sequentially added, stirred until the mixture is completely dissolved, finally, 0.5g of defoamer (Silok 4680 aqueous polyether silicone defoamer of Guangzhou Stokes Luo Ke Gao molecular polymer Co., ltd.) is added, and the mixture is continuously stirred until the mixture is fully dissolved, thereby obtaining the degreasing agent. The remainder is identical to example 1.
Example 13:
2.2 adding 5g of potassium hydroxide into 100mL of deionized water to dissolve completely, then adding 0.5g of sodium carbonate, stirring while adding, then adding 0.7g of sodium metasilicate pentahydrate, and stirring to dissolve completely; then, 1.3g of sec-octyl alcohol polyoxyethylene ether and 0.6g of degreasing surfactant (RQ-322H of Shenzhen Rong, inc. of strong science and technology) are sequentially added, stirred until the mixture is completely dissolved, and finally, 0.5g of defoamer (Silok, 4680 aqueous polyether silicone defoamer of Guangzhou Silo Ke Gao molecular polymer Co., ltd.) is added, and the mixture is continuously stirred until the defoamer is fully dissolved, thereby obtaining the degreasing agent. The remainder is identical to example 1.
Test example 1:
1.1 determination of cathodic polarization curve: electrochemical tests were performed on a PGSTAT-30 electrochemical workstation (Autolab, netherlands) using a three electrode system, all with a platinum sheet as the counter electrode and a Saturated Calomel Electrode (SCE) as the reference electrode. With platinum disk electrode (0.02 cm) 2 ) The working electrode was a 3mL/L electrolyte solution of the zinc plating combination brightener prepared in the various examples above and 200g/L KCl, 35g/L H 3 BO 3 Composition, scan rate was 10mV/s. Before each measurement, the working electrode is soaked in 10mL/L dilute hydrochloric acid for 1min, deoiled by ethanol and rinsed with distilled water. The cathode polarization curve is shown in FIG. 1, wherein A is the polarization curve of the electrolyte prepared by the galvanization brightener prepared in example 1, B is the polarization curve of the electrolyte prepared by the galvanization brightener prepared in example 2, C is the polarization curve of the electrolyte prepared by the galvanization brightener prepared in example 3, D is the polarization curve of the electrolyte prepared by the galvanization brightener prepared in example 4, E is the polarization curve prepared by the galvanization brightener prepared in example 5The polarization curve of the electrolyte and F are the polarization curves of the electrolyte prepared by the galvanization brightening agent prepared in example 6.
1.2 the dispersion ability of the zinc plating solution prepared in the above examples was tested by the Hull cell test method and the covering ability of the zinc plating solution was measured by the tubular inner hole method, respectively. The dispersibility of the zinc plating solutions prepared in the different examples is shown in fig. 2, wherein a is example 1, B is example 2, C is example 3, D is example 4, E is example 5, and F is example 6. The covering power of the zinc plating solutions prepared in the different examples is shown in fig. 3, wherein a is example 1, B is example 2, C is example 3, D is example 4, E is example 5, and F is example 6.
1.3 performance test of galvanized sheet:
1.3.1 gloss test: measured using a Mergan gloss meter, the measurement range is 0.1 to 100, and the resolution is 0.1 gloss units. The test selects 3 points in the center of the high, medium and low current density regions for measurement and then takes an average value. The gloss of the galvanized sheet produced in the different examples is shown in fig. 4, wherein a is example 1, B is example 2, C is example 3, D is example 4, E is example 5, and F is example 6.
1.3.2 testing of binding force: and (3) baking the galvanized sheet sample for 1h at 200 ℃ by adopting a thermal shock test method, taking out, immediately putting into room-temperature water, and circulating for 10 times.
1.3.3 testing of ductility: and (3) performing a cup test by using a GB-6 cup tester of Wu Zhong material experiment factories, and comparing the cup heights when cracks are generated. The binding force and ductility of the coating are tested in table 1.
TABLE 1 testing of the adhesion and ductility of coatings
As can be seen from fig. 1, the current densities of example 1, example 2 and example 3 at the same potential are smaller than those of example 4, example 5 and example 6, which indicates that the galvanization compositions of example 1, example 2 and example 3 can better enhance the cathode polarization; as can be seen from fig. 2 and 3, the zinc plating solutions of examples 1, 2 and 3 have a higher dispersibility and coverage than those of examples 4,5 and 6; as can be seen from fig. 4 and table 1, the galvanized sheets prepared in example 1, example 2 and example 3 have better plating gloss, plating binding force and plating ductility than those prepared in example 4, example 5 and example 6, which means that the combined brightening agent for galvanization containing L-4, 5-dihydroorotic acid and pyridoxine components can increase the polarization degree of the plating solution, enhance the dispersion and depth capabilities of the plating solution, and the obtained galvanized layer has fine and bright crystals and lower internal stress of the plating layer.
1.4 measurement of contact angle: deionized water was added dropwise to the surface of the cold rolled steel sheet after degreasing treatment in the above-described different examples, respectively, and the contact angle formed by the water drops with the surface was measured by using a CA-X type contact angle meter. The measurement results of the contact angle of the surface of the cold-rolled steel sheet after degreasing treatment are shown in fig. 5, wherein a is example 1, G is example 7, H is example 8, I is example 9, J is example 10, K is example 11, L is example 12, and M is example 13.
1.5 determination of porosity of galvanized sheet: the porosity of the coating is detected by adopting a filter paper pasting method. And (3) spreading the filter paper immersed with the color development solution on the coating, reacting micropores on the coating with chemicals on the filter paper, displaying colored points, and calculating the porosity of the coating through the points. Preparing detection solution, soaking 20g gelatin in 500mL distilled water, and heating until the gelatin solution is a colloid solution; 10g of potassium ferricyanide and 15g of sodium chloride are weighed again and dissolved in 200mL of distilled water. The two solutions were added with water to 1L. The measurement results of the porosity of the galvanized sheet are shown in fig. 6, wherein a is example 1, G is example 7, H is example 8, I is example 9, J is example 10, K is example 11, L is example 12, and M is example 13.
1.6 corrosion resistance test of galvanized sheet: the galvanized sheets prepared in the above examples were individually subjected to zinc-and-chromium-free passivation, left for 24 hours, and then subjected to a neutral salt spray test (NSS) in accordance with GB/T10125-1997 salt spray test for artificial atmosphere corrosion test. The time of the red spot on the surface is taken as corrosion resistance time. The corrosion resistance time of the galvanized sheet is shown in fig. 7, wherein a is example 1, G is example 7, H is example 8, I is example 9, J is example 10, K is example 11, L is example 12, and M is example 13.
As can be seen from fig. 5, the surface contact angle of the cold-rolled steel sheets after degreasing treatment in examples 1, 7 and 8 is smaller than that in examples 9, 10, 11, 12 and 13, i.e., the degreasing effect of the cold-rolled steel sheets in examples 1, 7 and 8 is better; as can be seen from fig. 6, the porosity of the galvanized sheets prepared in examples 1, 7 and 8 is smaller than that of the galvanized sheets prepared in examples 9, 10, 11, 12 and 13; as can be seen from fig. 7, the galvanized sheets prepared in examples 1, 7 and 8 have a corrosion resistance time after passivation longer than that of examples 9, 10, 11, 12 and 13, which shows that when sodium cyclohexylsulfamate and hydroxypropyl- β -cyclodextrin coexist, the synergistic effect can be exerted, further promote the removal of greasy dirt on the surface of the galvanized sheet, facilitate the electroplating of the metal surface, reduce and prevent pinhole pits, and improve the corrosion resistance of the galvanized sheet.
The conventional technology in the above embodiments is known to those skilled in the art, and thus is not described in detail herein.
The above embodiments are merely for illustrating the present invention and not for limiting the same, and various changes and modifications may be made by one of ordinary skill in the art without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions are also within the scope of the present invention, which is defined by the claims.
Claims (8)
1. A preparation method of a galvanization combined brightening agent is characterized by comprising the following steps: comprising the following steps:
dissolving anionic surfactant, nonionic surfactant, benzalacetone, o-chlorobenzaldehyde, sodium benzoate, L-4, 5-dihydro-orotic acid and pyridoxine in water, mixing uniformly, and adding benzotriazole dissolved in water at 90-100 ℃ to obtain the galvanized composite brightening agent.
2. The method of manufacturing according to claim 1, characterized in that: the anionic surfactant is isomeric alcohol polyoxyethylene ether sulfonate.
3. The method of manufacturing according to claim 1, characterized in that: the nonionic surfactant is fatty alcohol polyoxyethylene ether.
4. The preparation method according to claim 2, characterized in that: the isomeric alcohol polyoxyethylene ether sulfonate is selected from one of isomeric decyl alcohol oxyethylene ether sulfonate, isomeric undecyl alcohol polyoxyethylene ether sulfonate and isomeric tridecyl alcohol polyoxyethylene ether sulfonate.
5. The method of manufacturing according to claim 1, characterized in that: the galvanized composite brightening agent contains 150-180g/L of isomeric alcohol polyoxyethylene ether sulfonate, 60-80g/L of fatty alcohol polyoxyethylene ether, 18-25g/L of benzalacetone, 50-70g/L of o-chlorobenzaldehyde, 60-80g/L of sodium benzoate, 5-10g/L L-4, 5-dihydro orotic acid, 5-10g/L of pyridoxine and 4-8g/L of benzotriazole.
6. A galvanization composition brightening agent, characterized in that: a method according to any one of claims 1 to 5.
7. The preparation method of the galvanized sheet for the ship is characterized by comprising the following steps of:
A. pretreatment: polishing the cold-rolled plate until the surface is flat and bright, flushing the cold-rolled plate with deionized water for 3-5 times, and then carrying out ultrasonic treatment with acetone for 20-40min;
B. degreasing: soaking the pretreated cold-rolled sheet with degreasing agent to remove fat, and then flushing with deionized water for 3-5 times;
C. electrogalvanizing: electroplating is carried out by adding an electroplating solution into the electroplating bath, wherein the electroplating solution comprises the following components: 180-210g/L KCl, 50-70g/L ZnCl 2 、25-40g/L H 3 BO 3 2-5ml/L of the galvanising composition brightening agent as claimed in claim 6, p being regulatedH to 5-5.8;
D. and (5) emitting light, washing with water and drying.
8. The utility model provides a galvanized sheet for boats and ships which characterized in that: the method of claim 7.
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