CN102277022A - Water-based chrome-free Dacromet coating solution and preparation method thereof - Google Patents
Water-based chrome-free Dacromet coating solution and preparation method thereof Download PDFInfo
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- CN102277022A CN102277022A CN2011102360328A CN201110236032A CN102277022A CN 102277022 A CN102277022 A CN 102277022A CN 2011102360328 A CN2011102360328 A CN 2011102360328A CN 201110236032 A CN201110236032 A CN 201110236032A CN 102277022 A CN102277022 A CN 102277022A
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- aqueous chromium
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims description 17
- 239000011248 coating agent Substances 0.000 title abstract description 25
- 238000000576 coating method Methods 0.000 title abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 21
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004411 aluminium Substances 0.000 claims abstract description 19
- 239000002270 dispersing agent Substances 0.000 claims abstract description 9
- 238000009736 wetting Methods 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 36
- 230000000873 masking effect Effects 0.000 claims description 36
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 28
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical group OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims description 16
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 16
- 235000002949 phytic acid Nutrition 0.000 claims description 16
- 239000000467 phytic acid Substances 0.000 claims description 16
- 229940068041 phytic acid Drugs 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 16
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical group [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims description 16
- 239000004327 boric acid Substances 0.000 claims description 14
- 239000001384 succinic acid Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 11
- 238000002161 passivation Methods 0.000 claims description 10
- 230000008719 thickening Effects 0.000 claims description 10
- 150000002696 manganese Chemical class 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 229910002651 NO3 Inorganic materials 0.000 claims description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 6
- 238000004581 coalescence Methods 0.000 claims description 6
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical group [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 claims description 6
- CNFDGXZLMLFIJV-UHFFFAOYSA-L manganese(II) chloride tetrahydrate Chemical compound O.O.O.O.[Cl-].[Cl-].[Mn+2] CNFDGXZLMLFIJV-UHFFFAOYSA-L 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- 150000005846 sugar alcohols Polymers 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims description 2
- 125000005619 boric acid group Chemical group 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000003112 inhibitor Substances 0.000 abstract 1
- 239000002562 thickening agent Substances 0.000 abstract 1
- 239000000080 wetting agent Substances 0.000 abstract 1
- 239000012153 distilled water Substances 0.000 description 42
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 31
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 13
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 12
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 9
- 239000011651 chromium Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 6
- FJMNNXLGOUYVHO-UHFFFAOYSA-N aluminum zinc Chemical compound [Al].[Zn] FJMNNXLGOUYVHO-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- -1 polyoxyethylene Polymers 0.000 description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- BULVZWIRKLYCBC-UHFFFAOYSA-N phorate Chemical compound CCOP(=S)(OCC)SCSCC BULVZWIRKLYCBC-UHFFFAOYSA-N 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 206010020852 Hypertonia Diseases 0.000 description 1
- 235000008098 Oxalis acetosella Nutrition 0.000 description 1
- 240000007930 Oxalis acetosella Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
The invention discloses water-based chrome-free Dacromet coating solution. The coating solution is environment-friendly, is free of environmental pollution and simultaneously has good corrosion and weather resistance. The coating solution comprises components A, components B, a component C and components D, wherein the components A include 18-24% of zinc powder, 2-5% of aluminium powder, 28-34% of wetting and dispersing agent, 1-3% of passivator, 1-3% of corrosion inhibitor and water by mass; the components B include 5-12% of film-forming agent, 0.1-0.5% of forming auxiliaries and water by mass; the component C is 5-12% of film-forming auxiliary by mass; the components D include the balance of thickener and water; and the total mass percent of water is 18-27%.
Description
Technical field
The present invention relates to a kind of Dacroment masking liquid and preparation method thereof, more specifically to a kind of aqueous chromium-free Dacroment masking liquid and preparation method thereof.
Background technology
The corrosion of metal phenomenon is very general, and is very huge to the loss that national economy is brought.Dacromet Technology is the anticorrosion new technology in a kind of metallic surface that development in recent years is got up, and late 1960s is invented by U.S. DIAMOND SHAMROCK company.The great advantage of Dacroment coating is exactly to have splendid anti-corrosion capability, and its corrosion resisting property is compared with traditional galvanizing surface treatment process and can be improved 7-10 doubly; Coating has no hydrogen embrittlement, is specially adapted to the high strength stressed member; The high heat resistance of coating, heat resisting temperature reach 300 ℃, are particularly useful for the high strength component of automobile, motorcycle engine parts; Coating has excellent properties such as hypertonicity, high tack, high anti-attrition, high-weatherability, high resistance to chemicals product stability, nonstaining property simultaneously.But from the strict sense, Dacroment is nonpolluting coating completely, and this is because contain 2% Cr in the Dacroment treatment solution
6+Cr
6+Strong toxicity and human body had carcinogenesis also has very big toxic action to farm crop and microorganism; Simultaneously, although in the Dyclo paint overwhelming majority Cr
6+In being baked into membrane process, participate in reaction and changed into Cr
3+, but still have a spot of chromium with soluble Cr
6+Form be retained in the Dacroment coating, in use human body and environment are worked the mischief.
The sexavalent chrome problem is the global problem that exists at present, has therefore limited the application extensively and profoundly of this technology.Under this background, the appearance of chromium-free Dyclo technology is the certainty of Dacromet Technology development.At present, the chromium-free Dyclo coating of having reported mainly contains three kinds: the Geomet coating of U.S. MCI company, European Dakero B.V., Japanese NDS company and the Brazilian washing MCB of company cooperative development, the BNC aqueous chromium-free Aluminum Coating that the Delta coating of being released by German Delta company and Beijing Yongtaihe Metal Anticorrosion Technology Co., Ltd. release.Wherein, the Geomet coating is not accepted by domestic vast manufacturer by the influence of its price factor; And the Delta coating causes its production environment abominable because it adopts resin as its filmogen, can't obtain to approve widely; BNC aqueous chromium-free Aluminum Coating is then used less at home.Therefore, be badly in need of developing a kind of moderate cost, accepting aqueous chromium-free Dacroment masking liquid and preparation method thereof widely.
Summary of the invention:
The objective of the invention is to solve above-mentioned problems of the prior art with not enough, a kind of aqueous chromium-free Dacroment masking liquid is provided, this masking liquid environmental protection, non-environmental-pollution, nuisanceless, anti-corrosion good weatherability simultaneously.
The present invention also provides the preparation method of this aqueous chromium-free Dacroment masking liquid, and preparation method's technology is simple, applicable to suitability for industrialized production.
The present invention is achieved by the following technical solutions:
Aqueous chromium-free Dacroment masking liquid of the present invention, it is made up of following each component:
The A component is made up of zinc powder, aluminium powder, wetting dispersing agent, passivator, inhibiter and water;
The B component is made up of membrane-forming agent, shaping assistant and water;
The C component is a film coalescence aid;
The D component is that thickening material and water are formed;
Wherein the raw material in each component accounts for the mass percent of masking liquid and is: zinc powder 18%-24%, aluminium powder 2%-5%, wetting dispersing agent 28%-34%, passivator 1%-3%, inhibiter 1%-3%, water 18%-27%, membrane-forming agent 5%-12%, shaping assistant 0.1%-0.5%, film coalescence aid 5%-12%, remainder is a thickening material.
Aqueous chromium-free Dacroment masking liquid of the present invention, its further technical scheme are that described membrane-forming agent is Organic Manganese salt or inorganic manganese salt, and wherein said Organic Manganese salt is preferably manganous acetate; Described inorganic manganese salt is preferably manganous nitrate or Manganous chloride tetrahydrate.
Aqueous chromium-free Dacroment masking liquid of the present invention, its further technical scheme can also be that described passivator is phytic acid, the mass content of phytic acid 〉=70.0% wherein, the mass content of calcium≤0.02%; Described inhibiter is a Sodium orthomolybdate, wherein Na in the Sodium orthomolybdate
2MoO
42H
2The mass content of O 〉=99.0%.
Aqueous chromium-free Dacroment masking liquid of the present invention, its further technical scheme can also be that described wetting dispersing agent is pure and mild polyalcohols; Described shaping assistant is boric acid and Succinic Acid; Wherein said alcohol is preferably ethylene glycol, ethanol or glycerol; Described polyalcohols is preferably alkylphenol polyoxyethylene or polyoxyethylene glycol.
Aqueous chromium-free Dacroment masking liquid of the present invention, its further technical scheme can also be that described film coalescence aid is a silane coupling agent, wherein said silane coupling agent is preferably KH-550, KH560, KH570, KH792, DL602 or DL171, its purity requirement 〉=97.0%.
Aqueous chromium-free Dacroment masking liquid of the present invention, its further technical scheme can also be that described thickening material is the ether of cellulose or derivatives thereof; Wherein said thickening material is preferably Walocel MT 20.000PV or Natvosol.
The preparation method of aqueous chromium-free Dacroment masking liquid of the present invention, it may further comprise the steps:
1) preparation of passivation A slurry: after zinc powder, aluminium powder and wetting dispersing agent be uniformly dispersed, after adding entry and stirring 5-10min, add passivator and inhibiter and carry out passivation, obtain passivation A behind the passivation 1-2h and starch;
2) mixing of B, C slurry: slurry B, C slurry independently prepare finish after, slurry B, the mixing of C slurry, stirring 1-2h;
3) in passivation A slurry, add B, the C slurry that mixes;
4) after masking liquid stirs 6-12h, add thickening material and continue to stir, adjust dope viscosity to 40-60s according to being coated with 4 glasss.
Compared with prior art the present invention has following beneficial effect:
1, non-environmental-pollution, nuisanceless
The starting material that the present invention relates to do not contain any material to environment, human body harmful, and this has fundamentally stopped the source of polluting.In use simultaneously, a whole set of processing unit can adopt the provision for sealing of original Dacroment, can not produce waste water and the waste gas such as acid, alkali, chromium that environment there are pollution in process of production.Can not produce so in process of production yet and pollute environment.Therefore, aqueous chromium-free Dacroment masking liquid of the present invention is a kind of eco-friendly novel environment friendly coating.
2, energy consumption is low in the production process
Aqueous chromium-free Dacroment masking liquid of the present invention solidification value in solidification process has chromium Dacroment coating curing temperature to reduce about 50 ℃-100 ℃ than tradition, has so just saved a large amount of electric energy, has reduced production cost.
3, coating wear resistance is better
The more traditional Dacroment coating of hardness, the sticking power of aqueous chromium-free Dacroment coating of the present invention is enhanced, and the hardness of coating can reach 7H, and this makes coating have the better wear resistance energy.
Embodiment:
By following examples the present invention is described for example further, and do not limit the present invention in any way, under the prerequisite that does not deviate from technical solution of the present invention, the present invention is said that any change or the change of realization all will fall within the claim scope of the present invention this area plain metal personnel that make easily.
Embodiment 1:
A component: zinc powder 70g, aluminium powder 10g, OP-1060ml, ethylene glycol 60ml, distilled water 40ml, phytic acid 6ml, Sodium orthomolybdate 7g; The B component: manganous acetate 32g, boric acid 1g, Succinic Acid 1g, distilled water 60ml form; C component: KH-57041ml; D component: Walocel MT 20.000PV 0.3g, distilled water 10ml.
The preparation method:
1. with behind zinc powder 70g, aluminium powder 10g, OP-1060ml, the ethylene glycol 60ml uniform mixing, add 20ml distilled water reaction 5～10mim;
2. then with distilled water 20ml, phytic acid 6ml, Sodium orthomolybdate 7g uniform mixing, add the prepared aluminum zinc powder mixed system reaction 1～2h of step 1, make the A component;
3. manganous acetate 32g, boric acid 1g, Succinic Acid 1g, distilled water 60ml are mixed, make the B component;
4. the C component is joined in the B component and react 1～2h;
Walocel MT 20.000PV 0.3g, distilled water 10ml mixed the D component;
6. the B that step 4 is made, C mixed system and D component join in the A component simultaneously, make final masking liquid.
Embodiment 2:
A component: zinc powder 80g, aluminium powder 13g, polyoxyethylene glycol 70ml, ethanol 70ml, distilled water 40ml, phytic acid 7ml, Sodium orthomolybdate 8g; B component: manganous acetate 34g, boric acid 2g, Succinic Acid 2g, distilled water 70ml; C component: KH-550 50ml; D component: Natvosol 0.3g, distilled water 10ml.
The preparation method:
1. with behind zinc powder 80g, aluminium powder 13g, polyoxyethylene glycol 70ml, the ethanol 70ml uniform mixing, add 20ml distilled water reaction 5～10mim;
2. then with distilled water 20ml, phytic acid 7ml, Sodium orthomolybdate 8g uniform mixing, add the prepared aluminum zinc powder mixed system reaction 1～2h of step 1, make the A component;
3. manganous acetate 34g, boric acid 2g, Succinic Acid 2g, distilled water 70ml are mixed, make the B component;
4. the C component is joined in the B component and react 1～2h;
Natvosol 0.3g, distilled water 10ml mixed the D component;
6. the B that step 4 is made, C mixed system and D component join in the A component simultaneously, make final masking liquid.
Embodiment 3:
A component: zinc powder 30g, aluminium powder 5g, glycerol 30ml, OP-1030ml, distilled water 20ml, phytic acid 2.5ml, Sodium orthomolybdate 3g; B component: manganous nitrate 21g, boric acid 1g, Succinic Acid 1g, distilled water 30ml; C component: DL60220ml; D component: Natvosol 0.3g, distilled water 10ml.
The preparation method:
1. with behind zinc powder 30g, aluminium powder 5g, OP-1030ml, the glycerol 30ml uniform mixing, add 10ml distilled water reaction 5～10mim;
2. then with distilled water 10ml, phytic acid 2.5ml, Sodium orthomolybdate 3g uniform mixing, add the prepared aluminum zinc powder mixed system reaction 1～2h of step 1, make the A component;
3. manganous nitrate 21g, boric acid 1g, Succinic Acid 1g, distilled water 30ml are mixed, make the B component;
4. the C component is joined in the B component and react 1～2h;
Natvosol 0.3g, distilled water 10ml mixed the D component;
6. the B that step 4 is made, C mixed system and D component join in the A component simultaneously, make final masking liquid.
Embodiment 4:
A component: zinc powder 40g, aluminium powder 7g, ethylene glycol 35ml, OP-535ml, distilled water 20ml, phytic acid 3.5ml, Sodium orthomolybdate 4g; B component: manganous nitrate 25g, boric acid 1g, Succinic Acid 1g, distilled water 40ml; C component: KH-79225ml; D component: sodium cellulose glycolate 0.3g, distilled water 20ml.
The preparation method:
1. with behind zinc powder 40g, aluminium powder 7g, OP-535ml, the ethylene glycol 35ml uniform mixing, add 10ml distilled water reaction 5～10mim;
2. then with distilled water 10ml, phytic acid 3.5ml, Sodium orthomolybdate 4g uniform mixing, add the prepared aluminum zinc powder mixed system reaction 1～2h of step 1, make the A component;
3. manganous nitrate 25g, boric acid 1g, Succinic Acid 1g, distilled water 60ml are mixed, make the B component;
4. the C component is joined in the B component and react 1～2h;
Sodium cellulose glycolate 0.3g, distilled water 10ml mixed the D component;
6. the B that step 4 is made, C mixed system and D component join in the A component simultaneously, make final masking liquid.
Embodiment 5:
A component: zinc powder 30g, aluminium powder 5g, polyoxyethylene glycol 30ml, ethanol 30ml, distilled water 20ml, phytic acid 2.5ml, Sodium orthomolybdate 3g; The B component: Manganous chloride tetrahydrate 15g, boric acid 1g, Succinic Acid 1g, distilled water 30ml form; C component: KH-56020ml; D component: Walocel MT 20.000PV 0.3g, distilled water 10ml.
The preparation method:
1. with behind zinc powder 30g, aluminium powder 5g, polyoxyethylene glycol 30ml, the ethanol 30ml uniform mixing, add 10ml distilled water reaction 5～10mim;
2. then with distilled water 10ml, phytic acid 2.5ml, Sodium orthomolybdate 3g uniform mixing, add the prepared aluminum zinc powder mixed system reaction 1～2h of step 1, make the A component;
3. Manganous chloride tetrahydrate 15g, boric acid 1g, Succinic Acid 1g, distilled water 30ml are mixed, make the B component;
4. the C component is joined in the B component and react 1～2h;
Walocel MT 20.000PV 0.3g, distilled water 10ml mixed the D component;
6. the B that step 4 is made, C mixed system and D component join in the A component simultaneously, make final masking liquid.
Embodiment 6:
A component: zinc powder 40g, aluminium powder 7g, ethylene glycol 35ml, OP-1035ml, distilled water 20m, phytic acid 3.5ml, Sodium orthomolybdate 4g; B component Manganous chloride tetrahydrate 25g, boric acid 1g, Succinic Acid 1g, distilled water 40ml; C component DL17125ml; D component: Natvosol 0.3g, distilled water 20ml.
The preparation method:
1. with behind zinc powder 40g, aluminium powder 7g, OP-1035ml, the ethylene glycol 35ml uniform mixing, add 10ml distilled water reaction 5～10mim;
2. then with distilled water 10ml, phytic acid 3.5ml, Sodium orthomolybdate 4g uniform mixing, add the prepared aluminum zinc powder mixed system reaction 1～2h of step 1, make the A component;
3. Manganous chloride tetrahydrate 25g, boric acid 1g, Succinic Acid 1g, distilled water 60ml are mixed, make the B component;
4. the C component is joined in the B component and react 1～2h;
Natvosol 0.3g, distilled water 10ml mixed the D component;
6. the B that step 4 is made, C mixed system and D component join in the A component simultaneously, make final masking liquid.
It is as follows that aqueous chromium-free Dyclo paint of the present invention is tested its performance index according to GB/T 18684-2002: coat-thickness: one is coated with a baking 6-8 μ m; Two are coated with two baking 10-14 μ m.
Outward appearance: similar to conventional Dacroment coating, color is yellow slightly partially.
Sticking power: good.
Salt spray resistance: by 1000h (6-8 μ m).
Claims (10)
1. aqueous chromium-free Dacroment masking liquid is characterized in that being made up of following each component:
The A component is made up of zinc powder, aluminium powder, wetting dispersing agent, passivator, inhibiter and water;
The B component is made up of membrane-forming agent, shaping assistant and water;
The C component is a film coalescence aid;
The D component is thickening material and water;
Wherein the raw material in each component accounts for the mass percent of masking liquid and is: zinc powder 18%-24%, aluminium powder 2%-5%, wetting dispersing agent 28%-34%, passivator 1%-3%, inhibiter 1%-3%, water 18%-27%, membrane-forming agent 5%-12%, shaping assistant 0.1%-0.5%, film coalescence aid 5%-12%, remainder is a thickening material.
2. aqueous chromium-free Dacroment masking liquid according to claim 1 is characterized in that described membrane-forming agent is Organic Manganese salt or inorganic manganese salt.
3. aqueous chromium-free Dacroment masking liquid according to claim 2 is characterized in that described Organic Manganese salt is manganous acetate; Described inorganic manganese salt is manganous nitrate or Manganous chloride tetrahydrate.
4. aqueous chromium-free Dacroment masking liquid according to claim 1 is characterized in that described passivator is phytic acid, the mass content of phytic acid 〉=70.0% wherein, the mass content of calcium≤0.02%; Described inhibiter is a Sodium orthomolybdate, wherein Na in the Sodium orthomolybdate
2MoO
42H
2The mass content of O 〉=99.0%.
5. aqueous chromium-free Dacroment masking liquid according to claim 1 is characterized in that described wetting dispersing agent is pure and mild polyalcohols; Described shaping assistant is boric acid and Succinic Acid.
6. aqueous chromium-free Dacroment masking liquid according to claim 1 is characterized in that described film coalescence aid is a silane coupling agent.
7. aqueous chromium-free Dacroment masking liquid according to claim 6 is characterized in that described silane coupling agent is KH-550, KH560, KH570, KH792, DL602 or DL171, its purity requirement 〉=97.0%.
8. aqueous chromium-free Dacroment masking liquid according to claim 1 is characterized in that described thickening material is the ether of cellulose or derivatives thereof.
9. aqueous chromium-free Dacroment masking liquid according to claim 8 is characterized in that described thickening material is Walocel MT 20.000PV, Natvosol etc.
10. preparation method as the arbitrary described aqueous chromium-free Dacroment masking liquid of claim 1-10 is characterized in that may further comprise the steps:
1) preparation of passivation A slurry: after zinc powder, aluminium powder and wetting dispersing agent be uniformly dispersed, after adding entry and stirring 5-10min, add passivator and inhibiter and carry out passivation, obtain passivation A behind the passivation 1-2h and starch;
2) mixing of B, C slurry: slurry B, C slurry independently prepare finish after, slurry B, the mixing of C slurry, stirring 1-2h;
3) in passivation A slurry, add B, the C slurry that mixes;
4) after masking liquid stirs 6-12h, add thickening material and continue to stir, adjust dope viscosity to 40-60s according to being coated with 4 glasss.
Priority Applications (1)
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| CN201110236032.8A CN102277022B (en) | 2011-08-17 | 2011-08-17 | Water-based chrome-free Dacromet coating solution and preparation method thereof |
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Date of cancellation: 20220429 Granted publication date: 20131030 Pledgee: Nanjing Bank Co.,Ltd. Nanjing North Branch Pledgor: NANJING XINHUAYUAN NANO TECHNOLOGY Co.,Ltd. Registration number: Y2019320000215 |
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Effective date of registration: 20220607 Address after: Room 402, No. 134, Qingshi village, Gulou District, Nanjing, Jiangsu 210037 Patentee after: Zhu Chengfei Address before: 210009, No. 5, new exemplary Road, Nanjing, Jiangsu Patentee before: NANJING XINHUAYUAN NANO TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20131030 |