CN109825826A - A kind of chrome-free insulating masking liquid and preparation method thereof and directional silicon steel - Google Patents
A kind of chrome-free insulating masking liquid and preparation method thereof and directional silicon steel Download PDFInfo
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- CN109825826A CN109825826A CN201910143888.7A CN201910143888A CN109825826A CN 109825826 A CN109825826 A CN 109825826A CN 201910143888 A CN201910143888 A CN 201910143888A CN 109825826 A CN109825826 A CN 109825826A
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- free insulating
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- masking liquid
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- 239000007788 liquid Substances 0.000 title claims abstract description 33
- 230000000873 masking effect Effects 0.000 title claims abstract description 33
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 47
- 238000000576 coating method Methods 0.000 claims abstract description 47
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 37
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000243 solution Substances 0.000 claims abstract description 24
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 19
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 19
- 239000010452 phosphate Substances 0.000 claims abstract description 19
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- ODNBVEIAQAZNNM-UHFFFAOYSA-N 1-(6-chloroimidazo[1,2-b]pyridazin-3-yl)ethanone Chemical compound C1=CC(Cl)=NN2C(C(=O)C)=CN=C21 ODNBVEIAQAZNNM-UHFFFAOYSA-N 0.000 claims abstract description 8
- GUNJVIDCYZYFGV-UHFFFAOYSA-K Antimony trifluoride Inorganic materials F[Sb](F)F GUNJVIDCYZYFGV-UHFFFAOYSA-K 0.000 claims abstract description 8
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004327 boric acid Substances 0.000 claims abstract description 8
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 8
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 8
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 8
- IYDGMDWEHDFVQI-UHFFFAOYSA-N phosphoric acid;trioxotungsten Chemical compound O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.OP(O)(O)=O IYDGMDWEHDFVQI-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011975 tartaric acid Substances 0.000 claims abstract description 7
- 235000002906 tartaric acid Nutrition 0.000 claims abstract description 7
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 9
- 239000008199 coating composition Substances 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-L Phosphate ion(2-) Chemical compound OP([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-L 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 230000001976 improved effect Effects 0.000 abstract description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 10
- 239000011651 chromium Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 150000001845 chromium compounds Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 210000000981 epithelium Anatomy 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- SGRJLTOOQLQDRH-UHFFFAOYSA-N 2-[[2,4-dicarboxybutyl(hydroxy)phosphoryl]methyl]pentanedioic acid Chemical compound OC(=O)CCC(C(O)=O)CP(O)(=O)CC(C(O)=O)CCC(O)=O SGRJLTOOQLQDRH-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 description 1
- 229940062672 calcium dihydrogen phosphate Drugs 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- SEGLCEQVOFDUPX-UHFFFAOYSA-N di-(2-ethylhexyl)phosphoric acid Chemical compound CCCCC(CC)COP(O)(=O)OCC(CC)CCCC SEGLCEQVOFDUPX-UHFFFAOYSA-N 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- QQFLQYOOQVLGTQ-UHFFFAOYSA-L magnesium;dihydrogen phosphate Chemical compound [Mg+2].OP(O)([O-])=O.OP(O)([O-])=O QQFLQYOOQVLGTQ-UHFFFAOYSA-L 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 235000019691 monocalcium phosphate Nutrition 0.000 description 1
- 229910000401 monomagnesium phosphate Inorganic materials 0.000 description 1
- 235000019785 monomagnesium phosphate Nutrition 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 208000012802 recumbency Diseases 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- MFXMOUUKFMDYLM-UHFFFAOYSA-L zinc;dihydrogen phosphate Chemical compound [Zn+2].OP(O)([O-])=O.OP(O)([O-])=O MFXMOUUKFMDYLM-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Chemical Treatment Of Metals (AREA)
Abstract
The present invention provides a kind of chrome-free insulating masking liquid and preparation method thereof and directional silicon steel.The chrome-free insulating masking liquid includes following components: phosphate solution 150-200 parts by weight, citric acid 8-15 parts by weight, magnesium hydroxide 2-8 parts by weight, boric acid 7-10, silica solution 160-250 parts by weight, tartaric acid 1-10 parts by weight, antimony trifluoride 1-10 parts by weight, phosphotungstic acid 1-10 parts by weight and water 100-300 parts by weight.The chrome-free insulating masking liquid the preparation method comprises the following steps: phosphate solution, boric acid and water is added, stirring；Antimony trifluoride, citric acid and tartaric acid are sequentially added, is stirred；Magnesium hydroxide and phosphotungstic acid is added, makes pH 1-5；Silica solution is added, stirs to get the chrome-free insulating masking liquid is arrived.Chrome-free insulating coating of the invention has high interface resistance and surface hardness, and has excellent corrosion resistance and extremely strong surface tension, shows brilliant magnetic property improved effect.
Description
Technical field
The invention belongs to silicon steel technical field more particularly to a kind of chrome-free insulating masking liquid and preparation method thereof and orientation silicon steels
Plate.
Background technique
As a kind of important magnetic material, the excellent properties with high magnetic strength, low iron loss are often widely used in orientation silicon steel
The core material of power transformer.The insulating coating of orientation silicon steel surface coating not only has the function of antirust, anti-corrosion and insulation,
The tension that its surface generates can also reduce iron loss, reduce magnetostriction coefficient, reduce transformer energy consumption and noise.Therefore, it insulate
Coating is the important component of orientation silicon steel.
But the used insulating coating solution overwhelming majority is containing chromate at present.Insulating coating solution containing chromate
Coated in steel plate after high temperature drying sintering film forming, Cr VI presence is had in steel plate coating always.If discarded steel plate
If unreasonable recycling, not only it is detrimental to health but also seriously pollutes environment.If the Cr VI in recycling coating,
Entreprise cost can be substantially increased.Therefore, develop high comprehensive performance, in coating final product without toxic Cr VI and
The silicon steel insulating coating being easily recycled is an urgent demand of domestic and international silicon steel industry.As the scheme of substitution chromic anhydride, patent JP is special
The method that 2000169973 propositions addition boron compound replaces chromium compound is opened, patent JP Tetsukai 2000169972 proposes addition oxygen
The method of compound colloid.But no matter above-mentioned any technology being used, the comprehensive performance that all can not achieve coating reaches and contains chromium
The comparable performance of coating.
Summary of the invention
The present invention provides one kind without toxic Cr VI to solve above-mentioned technical problem and is easily recycled, and has excellent performance
Chrome-free insulating masking liquid and preparation method thereof and directional silicon steel.
The object of the invention is realized using following proposal:
A kind of chrome-free insulating masking liquid, the chrome-free insulating masking liquid includes following components: phosphate solution 150-200 weight
Part, citric acid 8-15 parts by weight, magnesium hydroxide 2-8 parts by weight, boric acid 6-10, silica solution 150-250 parts by weight, tartaric acid 1-10
Parts by weight, antimony trifluoride 1-10 parts by weight, phosphotungstic acid 1-10 parts by weight and water 100-300 parts by weight.
In above scheme, the solid content of the chrome-free insulating masking liquid is 20%~40%, and specific gravity is 1.1g/ml~1.3g/
Ml, viscosity are 10s~30s.
In above scheme, the silica solution is that acid or alkaline silica sol, the partial size of silicon dioxide granule are received for 1-10
Rice.
In above scheme, the phosphate solution is the mixing of phosphate dihydrogen aluminum solution and biphosphate magnesium solution.
The preparation method of the chrome-free insulating masking liquid, includes the following steps:
Phosphate solution, boric acid and water, stirring is added；
Antimony trifluoride, citric acid and tartaric acid are sequentially added, is stirred；
Magnesium hydroxide and phosphotungstic acid is added, makes pH 1-5,
Silica solution is added, stirs to get the chrome-free insulating masking liquid is arrived.
A kind of directional silicon steel comprising substrate and the chrome-free insulating coating for being formed in the substrate surface, the Chrome-free
Insulating coating is by the way that the chrome-free insulating masking liquid to be coated in obtained by substrate surface.
In above scheme, the preparation method of the chrome-free insulating coating specifically:
The chrome-free insulating masking liquid is coated on orientation silicon steel steel plate, by the coating composition of coating at 350-500 DEG C
At a temperature of dry 30s~80s, then in 800 DEG C~1000 DEG C of at a temperature of sintering curing 50s~150s, i.e., in orientation silicon steel
Surface of steel plate forms chrome-free insulating coating.
In above scheme, the chrome-free insulating coating with a thickness of 1-5 microns.
In above scheme, dry film coated weight is controlled in 2.0-7.0g/m2In range.
Compared with prior art, the present invention having the positive effect that:
1. chrome-free insulating coating of the invention is free of chromium compound (+6 valence Cr and+trivalent Cr), without RoHS defined
The toxic substance such as (Pb, Cr, Hg, Cd, PBB, PBDA), is easily recycled.
2. chrome-free insulating coating of the invention can stablize preservation 3 months or more (viscosity change value is less than 5s) at normal temperature,
Levelability and wetability are good, are easy to coat in orientation silicon steel surface of steel plate, and can satisfy 800 DEG C~1000 DEG C after coating operation
Silicon steel plate sintering curing temperature and directly cooling.
3. chrome-free insulating coating coating of the invention shows outstanding adhesion, corrosion resistance, resistance to skin on the steel plate
The exudative and outstanding adhesion resistance of film, lubricity, stampability, the excellent in performance such as weldability.
4. chrome-free insulating coating of the invention has high interface resistance and surface hardness, and has extremely strong surface
Tension shows brilliant magnetic property improved effect.Its oriented silicon steel can fully meet high-power transformer and extra-high
The requirements such as pressure transformer.
Specific embodiment
It is further below in conjunction with specific embodiment for the contents of the present invention, technical solution and advantage is more clearly understood
Illustrate the present invention, these embodiments are merely to illustrate the present invention, and the present invention is not limited only to following embodiment.
The present invention provides a kind of chrome-free insulating masking liquid, and the chrome-free insulating masking liquid includes following components: phosphate solution
150-200 parts by weight, citric acid 8-15 parts by weight, magnesium hydroxide 2-8 parts by weight, boric acid 7-10, silica solution 160-250 weight
Part, tartaric acid 1-10 parts by weight, antimony trifluoride 1-10 parts by weight, phosphotungstic acid 1-10 parts by weight and water 100-300 parts by weight.
The solid content of the coating composition be 20%~40%, specific gravity be 1.1g/ml~1.3g/ml, viscosity be 10s~
30s (4# Ford cup)；The quality of water is mainly adjusted according to the viscosity of composition.
The solid content of phosphate solution is 40%-60%, and phosphate is preferably dihydric phosphate.Dihydric phosphate is preferably
Any one in aluminium dihydrogen phosphate, calcium dihydrogen phosphate, biphosphate nickel, phosphate dihydrogen manganese, magnesium dihydrogen phosphate or zinc dihydrogen phosphate
Or the mixed solution of two or more arbitrary proportions.Further, phosphate solution is preferably phosphate dihydrogen aluminum solution and di(2-ethylhexyl)phosphate
The mixing of hydrogen magnesium solution.
The partial size of silicon dioxide granule is 1-10 nanometers in silica solution.The quality percentage of silica dioxide granule contains in silica solution
Amount is 20-30%.Silicon dioxide granule is acid or alkaline silicon dioxide particle, preferably acid silicon dioxide particle.
The present invention also provides the preparation methods of the chrome-free insulating masking liquid, include the following steps:
Phosphate solution, boric acid and water, stirring is added；
Antimony trifluoride, citric acid and tartaric acid are sequentially added, is stirred；
Magnesium hydroxide and phosphotungstic acid is added, makes pH 1-5；
Silica solution is added, stirs to get the chrome-free insulating masking liquid is arrived.
The present invention also provides a kind of directional silicon steels comprising substrate and the chrome-free insulating for being formed in the substrate surface apply
Layer, the chrome-free insulating coating be as by chrome-free insulating masking liquid be coated in substrate surface obtained by, method particularly includes: in orientation silicon steel
The chrome-free insulating masking liquid is coated on steel plate, at a temperature of drying 30s~80s by the coating composition of coating at 350-500 DEG C,
Then in 800 DEG C~1000 DEG C of at a temperature of sintering curing 50s~150s, i.e., chrome-free insulating is formed in orientation silicon steel surface of steel plate
Coating controls dry film coated weight in 2.0-7.0g/m2In range.Chrome-free insulating coating with a thickness of 1-5 microns.
With specific embodiment, invention is further explained below, and table 1 lists the chrome-free insulating of different formulations
Masking liquid.
The chrome-free insulating masking liquid of the different compositions of 1 embodiment of the present invention of table and comparative example
It should be noted that the quality of water can be added according to the requirement of the viscosity of composition and solid content.
Being coated in orientation silicon steel plate surface by coating made from examples and comparative examples of the present invention, (orientation silicon steel presses thickness
There are 0.18mm, 0.2mm, 0.23mm, 0.27mm, 0.3mm equal-specification, test, which is chosen, passes through the annealing of high temperature secondary recrystallization
0.23mm grain-oriented Si steel sheet), before coating, grain-oriented Si steel sheet is put into soak at room temperature 1min in 3.0% dilution heat of sulfuric acid,
Then cleaning scrub is carried out with deionized water and fur brush, quickly dries up surface moisture, it is floating grey to remove surface oxidation magnesium etc.
The coating experiment is carried out to clean directional silicon steel.
Insulating coating solution is coated to orientation silicon steel surface of steel plate by coating machine paint roller, the coating composition of obtained coating
Steel plate is directly entered in 450 DEG C of continuous stove and dries, and coated weight is controlled in 2.0-7.0g/m2In range；And it is continuously moving back
900 DEG C of progress 1min sintering in stove form uniform chrome-free insulating coating, work after progress in surface of steel plate after taking out cooling
Continuous processing.
After the completion of coated test, salt fog, the test such as interface resistance and magnetic property are carried out to breadboard.
The test of 2 coating performance of table
The specific test method is as follows for the measurement performance being related in table 2:
1) test method of epithelium tension are as follows:
Double-coated coating composition is formed into the silicon steel sheet of chrome-free insulating coating by the examination rolled to cutting 30mm × 280mm
Piece is tested, the insulating coating of test film one side is removed, test film recumbency is erected, one end is fixed with 30mm, measures the curved of the other end
Qu great little brings data into following equation and calculates:
σ (MPa)=1.2152 × 105 (MPa) × plate thickness (mm) × bending (mm)/250 (mm)/250 (mm).
2) test method that substance oozes out in resistance to epithelium are as follows:
30 minutes 100 DEG C of vapor is sprayed to test film, observes the appearance color change situation of coating.
Evaluation method: zero: substantially constant color △: a part discoloration ×: discoloration completely.
3) test method of coating adhesion are as follows:
Evaluation method: test film is bent to20, the circle of 30mm is stained with transparent rubberized fabric in bending section, then again
Transparent rubberized fabric is opened, to visually observe the peeling situation of insulating coating.
Evaluation criterion: zero: a little without peeling off △: a part peeling ×: it is a large amount of to peel off
4) test method of corrosion resistance are as follows:
Evaluation method: before annealing: SST 12 hours；After annealing: SST 5 hours.
Evaluation criterion: applicable is 10 methods.
10: red rust area 0%9: red rust area 0~1%8: red rust area 1~5%7: red rust area 5~10%6: red rust
Area 10~15%5: red rust area 15~25%4: red rust area 25~35%3: red rust area 35~45%2: red rust area
45~65%1: 65% or more red rust area.
It should be noted that the foregoing is merely presently preferred embodiments of the present invention, various modifications to these embodiments pair
Will be apparent for those skilled in the art, therefore, the present invention be not intended to be limited to it is shown in this article this
A little embodiments, any changes and modifications in accordance with the scope of the present application should belong to patent of the invention and cover
Within the scope of.
Claims (9)
1. a kind of chrome-free insulating masking liquid, which is characterized in that the chrome-free insulating masking liquid includes following components: phosphate solution 150-
200 parts by weight, citric acid 8-15 parts by weight, magnesium hydroxide 2-8 parts by weight, boric acid 7-10, silica solution 160-250 parts by weight, wine
Stone acid 1-10 parts by weight, antimony trifluoride 1-10 parts by weight, phosphotungstic acid 1-10 parts by weight and water 100-300 parts by weight.
2. chrome-free insulating masking liquid as described in claim 1, which is characterized in that the solid content of the chrome-free insulating masking liquid is 20%
~40%, specific gravity is 1.1g/ml~1.3g/ml, and viscosity is 10s~30s.
3. chrome-free insulating masking liquid as described in claim 1, which is characterized in that the silica solution is acid or alkaline silica sol,
The partial size of its silicon dioxide granule is 1-10 nanometers.
4. chrome-free insulating masking liquid as described in claim 1, which is characterized in that the phosphate solution is phosphate dihydrogen aluminum solution
With the mixing of biphosphate magnesium solution.
5. the preparation method of chrome-free insulating masking liquid according to any one of claims 1-4, which is characterized in that including walking as follows
It is rapid: phosphate solution, boric acid and water, stirring is added；
Antimony trifluoride, citric acid and tartaric acid are sequentially added, is stirred；
Magnesium hydroxide and phosphotungstic acid is added, makes pH 1-5；
Silica solution is added, stirs to get the chrome-free insulating masking liquid is arrived.
6. a kind of directional silicon steel, which is characterized in that it includes substrate and the chrome-free insulating coating for being formed in the substrate surface,
The chrome-free insulating coating is by the way that the described in any item chrome-free insulating masking liquids of Claims 1-4 are coated in substrate surface institute
?.
7. directional silicon steel as claimed in claim 6, which is characterized in that the preparation method of the chrome-free insulating coating is specific
Are as follows: the chrome-free insulating masking liquid is coated on orientation silicon steel steel plate, by the coating composition of coating 350-500 DEG C at a temperature of
Dry 30s~80s, then in 800 DEG C~1000 DEG C of at a temperature of sintering curing 50s~150s, i.e., in orientation silicon steel steel plate table
Face forms chrome-free insulating coating.
8. directional silicon steel as claimed in claim 7, which is characterized in that the chrome-free insulating coating with a thickness of 1-5 microns.
9. directional silicon steel as claimed in claim 7, which is characterized in that control dry film coated weight is in 2.0-7.0g/m2Range
It is interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910143888.7A CN109825826B (en) | 2019-02-27 | 2019-02-27 | Chromium-free insulating coating liquid, preparation method thereof and oriented silicon steel plate |
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| CN115651464A (en) * | 2022-11-03 | 2023-01-31 | 武汉科技大学 | Non-oriented silicon steel insulation coating liquid, preparation method thereof and non-oriented silicon steel plate |
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| CN115651464B (en) * | 2022-11-03 | 2023-11-14 | 武汉科技大学 | Non-oriented silicon steel insulating coating liquid and preparation method thereof and non-oriented silicon steel plate |
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