CN103397320A - Cathodic electrophoresis pre-treatment liquor used on surface of hot-galvanized plate of automobile - Google Patents
Cathodic electrophoresis pre-treatment liquor used on surface of hot-galvanized plate of automobile Download PDFInfo
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- CN103397320A CN103397320A CN2013103641347A CN201310364134A CN103397320A CN 103397320 A CN103397320 A CN 103397320A CN 2013103641347 A CN2013103641347 A CN 2013103641347A CN 201310364134 A CN201310364134 A CN 201310364134A CN 103397320 A CN103397320 A CN 103397320A
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- 238000001962 electrophoresis Methods 0.000 title abstract description 27
- 238000002203 pretreatment Methods 0.000 title abstract description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 20
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 10
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 9
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011787 zinc oxide Substances 0.000 claims abstract description 8
- 239000008367 deionised water Substances 0.000 claims abstract description 5
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 24
- 150000001282 organosilanes Chemical class 0.000 claims description 23
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 9
- 230000009182 swimming Effects 0.000 claims description 9
- 239000004593 Epoxy Substances 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229940116007 ferrous phosphate Drugs 0.000 claims description 2
- 229910000155 iron(II) phosphate Inorganic materials 0.000 claims description 2
- SDEKDNPYZOERBP-UHFFFAOYSA-H iron(ii) phosphate Chemical compound [Fe+2].[Fe+2].[Fe+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O SDEKDNPYZOERBP-UHFFFAOYSA-H 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 abstract description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 9
- 239000010452 phosphate Substances 0.000 abstract description 9
- 238000012545 processing Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229910000077 silane Inorganic materials 0.000 abstract description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 abstract 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical group CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 33
- 238000003756 stirring Methods 0.000 description 28
- 238000000034 method Methods 0.000 description 21
- 238000012360 testing method Methods 0.000 description 18
- 238000000576 coating method Methods 0.000 description 14
- 239000011248 coating agent Substances 0.000 description 13
- 239000003973 paint Substances 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 12
- 238000005238 degreasing Methods 0.000 description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- 229910052725 zinc Inorganic materials 0.000 description 9
- 239000011701 zinc Substances 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 7
- 239000007864 aqueous solution Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000013049 sediment Substances 0.000 description 6
- 238000004381 surface treatment Methods 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 description 5
- 229910052761 rare earth metal Inorganic materials 0.000 description 5
- -1 silicon ester Chemical group 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004070 electrodeposition Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- AVAGDIXDPQCKCQ-UHFFFAOYSA-N 1-nitro-1,2-dihydroacenaphthylene Chemical compound C1=CC(C([N+](=O)[O-])C2)=C3C2=CC=CC3=C1 AVAGDIXDPQCKCQ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910002808 Si–O–Si Inorganic materials 0.000 description 1
- JBMRMLLHFBHFDV-UHFFFAOYSA-N [Ni].[Mn].[Zn] Chemical compound [Ni].[Mn].[Zn] JBMRMLLHFBHFDV-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000011964 heteropoly acid Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 150000002696 manganese Chemical class 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
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002444 silanisation Methods 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Chemical Treatment Of Metals (AREA)
Abstract
The invention discloses a cathodic electrophoresis pre-treatment liquor used on the surface of a hot-galvanized plate of an automobile, and belongs to the technical field for hot-galvanized plate surface processing. The treatment liquor consists of: by mass, 10-20% of an organic silane, 5-10% of a phosphatized component and the balance deionized water, wherein the phosphatized component consists of 0.8-1 g/L of manganous nitrate, 0.8-1.2 g/L of zinc oxide, 5-15 g/L of phosphoric acid, 0.8-1 g/L of nicdel nitrate and 0.8-1.5 g/L of ferrous(II) phosphate, and the organic silane is 3-(2,3-epoxypropoxy)propyltrimethoxysilane. The treatment liquor is adjusted in pH value to 3-4 by phosphoric acid, stirred for 30 minutes and allowed to stand for 1 hour, and then is usable. The treatment liquor has the characteristics of simple technological flow, rapid film forming, reduced production cost, reduced environmental pollutions and the like.
Description
Technical field:
The invention belongs to the heat zinc coating plate technical field of surface, be specifically related to a kind of for tide of motorism galvanized sheet cathode of surface swimming pretreatment liquid.
Background technology:
Existing cathode electro-coating technique generally adopts zinc, manganese, nickel three cation Phosphating Solution to carry out pre-treatment, with the solidity to corrosion of raising electrodeposited paint film and the bonding force of workpiece surface, but generally contain the environmentally harmful materials such as heavy metal phosphoric acid salt and nitrite in Phosphating Solution; Easily produce simultaneously sediment in parkerizing process, thereby affect normally carrying out of producing.
Paper " STUDY ON ALKALI RESISTANCE of electrophoretic painting normal-temperance phosphating process and phosphatize phosphate coat " (" material protection "; 2008; 41 (4): 67 ~ 68) reported by adding nickel salt, manganese salt, carboxyl polymer; take the nitro acenaphthene as promotor; developed a kind of Phosphating Solution, can form the ellipsoid shape phosphate crystal film that one deck is comparatively fine and close, alkali resistance is good under this Phosphating Solution normal temperature in 10 minutes.Chinese patent CN102102200A discloses a kind of Phosphating Solution that is applicable to cathode electro-coating, and this Phosphating Solution use temperature is 25 ~ 45 ℃, phosphating time 2 ~ 6 minutes.Chinese patent CN1749432A discloses a kind of low temperature zinc-manganese-nickel ternary phosphorizing liquid, and this Phosphating Solution use temperature is 30 ~ 45 ℃, phosphating time 2 ~ 3 minutes.Although above-mentioned three kinds of etching solutions form phosphatize phosphate coat at plate surface, phosphorization treatment time is all over 2 minutes, and phosphatization temperature is higher, and the toxic substance quantity discharged is large, is unfavorable for environmental protection.
It is a kind of metal surface treatment technology that developed recently gets up that organosilane is processed, and organosilane is processed simple and safe, gets final product with the alkali neutralization during discharging.Organosilane has unique structure and performance, generally contains X in its molecule
3Si (CH
2)
nY structure (wherein, X represents silicon ester, and Y represents organo-functional group).The silicon ester hydrolyzable is silanol (Si-OH), silanol and metal base surface form hydrogen bond, dehydration forms the Si-O-M (M is as metallic matrix) take covalent bonds, can prevent that sealing or other corrosive mediums touch metallic surface, the intermolecular Si-O-Si that mutually is condensed into of while silanol, final polymerization is formed with certain thickness, comparatively fine and close three-dimensional net structure rete, covers metal base surface, thereby increases substantially the solidity to corrosion of metallic matrix.
Part is arranged about the report of silane-RE compounding technology as the ability cathode electrophoresis pre-treatment, a kind of rare earth fluorine zirconates complex treatment agent technology that is applicable to the ability cathode electrophoresis pre-treatment is disclosed as Chinese patent CN102787311A, this treatment technology can carry out after cleaning by degreasing or pickling, film formation time is 30 seconds.Chinese patent CN102140667A discloses the polyoxometallic acid rare-earth salts that is applicable to a kind of ability cathode electrophoresis pre-treatment-silanization treatment technology, can form in metallic surface silane-silicon-molybdenum heteropoly acid Rare Earth Lanthanum hybridized film.Although it is good that above-mentioned treatment solution can form sticking power, the conversion film of excellent corrosion resistance, the rare-earth salts cost is high, and process for preparation is complicated, length consuming time, and process for preparation need in a large number with an organic solvent, therefore be unfavorable for enterprise practical production.
Summary of the invention:
The present invention is directed to the problems referred to above that prior art exists, provide a kind of for tide of motorism galvanized sheet cathode of surface swimming pretreatment liquid.The erosion resistance that improves electrodeposited paint film by the phosphatization in treatment solution, organosilane component reaches and the metallic surface bonding force, reduces the impact of electrophoresis production process on environment.
A kind of composition and quality percentage composition thereof for the treatment solution before the swimming of tide of motorism galvanized sheet cathode of surface provided by the present invention is as follows:
Organosilane: 10 ~ 20%, the phosphatization component: 5 ~ 10%, all the other are deionized water.
The composition of described phosphatization component and every liter of content thereof are as follows:
Manganous nitrate 0.8 ~ 1g/L
Zinc oxide 0.8 ~ 1.2g/L
Phosphoric acid 5 ~ 15g/L
Nickelous nitrate 0.8 ~ 1g/L
Ferrous phosphate 0.8 ~ 1.5g/L.
Described phosphatization component is at the auxiliary for the treatment of processes as organosilane, and heavy metallic salt content is low, need not to carry out the mensuration of free acid and total acidity.
Described organosilane is 3-(2,3-epoxy the third oxygen) propyl trimethoxy silicane (KH-560), KH-560 is a kind of silane coupling agent that contains epoxy group(ing), in its molecule, contained epoxy group(ing) makes it have excellent physicochemical property, be mainly used to improve the cementability of organic materials and inorganic material surface and the physical strength that improves matrix material, and higher conservation rate is arranged under hygrometric state, while guaranteeing into groove, condition of surface is stable.Organosilane configures with deionized water, is mixed with the organosilane aqueous solution.
This treatment solution is prepared by the following method: under normal temperature, add deionized water for stirring even phosphoric acid, add successively again zinc oxide, manganous nitrate, nickelous nitrate, Iron nitrate, rear and organosilane aqueous solution stir, regulating treatment solution pH value with phosphoric acid is 3 ~ 4, stirs use in standing 1 hour after 30 minutes.
The top condition that the prepared treatment solution of the present invention is used for heat zinc coating plate surface formation organosilane phosphatize phosphate coat is: tank liquor pH value: 3 ~ 4, treatment temp: 25 ~ 30 ℃, the treatment time: 60 ~ 80 seconds, take processing parameter to be during electrophoretic painting: voltage: 150V, time: 2 minutes, temperature: 35 ℃.
The cathode electro-coating technical process that the prepared treatment solution of the present invention is used for the heat zinc coating plate surface is: pre-degreasing → degreasing → washing → oven dry → surface treatment → electrophoresis.
Estimate the performance that product of the present invention is used for heat zinc coating plate surface formation organosilane phosphatize phosphate coat, mainly by the quality to cathodic electrophoretic paint after application, test to realize.Evaluation result can obtain by following experiment content:
(1) stability for the treatment of solution
Treatment solution is placed under room temperature condition airtight preservation three months, the state of observation treatment solution.
(2) neutral salt spray test
With reference to the GB10125-1997 standard, paint film is carried out neutral salt spray test.The etchant solution of this experiment is 5% sodium chloride solution, pH value of solution=7 (± 0.5), in spray box, temperature is 35 (± 2) ℃, sinkability is 2mL/ (80cm
2H), sample becomes 30 ° of placements with salt fog frame vertical direction, after spraying continuously 1000 hours, observes workpiece surface and draws the width of fork place corrosion.
(3) impulse withstand test
With reference to GB/T1732, it is that the weight of 1Kg is fallen along cylinder from the height of 50cm that test is adopted, and the distance that drift enters groove is greater than 2mm.Observe impact place paint film spalling situation.
(4) adhesion test
Sticking power uses special determinator to draw a string circle that overlaps mutually and intersect at coating surface, observes the situation of pull-away in the area that the circle of these overlapping intersections surrounds, and is divided into 7 grades during evaluation.
Product of the present invention has following characteristic advantage:
(1) in treatment solution of the present invention, contained phosphatization component, mainly as the auxiliary of organosilane, need not the parameters such as its total acid of results of regular determination, free acid, has reduced production cost;
(2) treatment solution of the present invention soaks dissolution rate after 2 minutes and, less than 2%, can keep higher stability in electrophoresis process in electrophoresis chamber.In treatment solution, the phosphatization component can improve the alkali resistance of organosilane phosphatize phosphate coat, and with respect to general silane conversion film and phosphatize phosphate coat, alkali resistance has improved respectively 10.67% and 16.83%;
(3) in treatment solution, the phosphatization component concentration is few, can reduce the discharging of phosphorus-containing wastewater, reduces the pollution to environment;
(4) thin organosilane phosphatize phosphate coat under the effect of phosphatization component, increases with respect to common organosilane film solidity to corrosion, and the experiment of copper sulfate drop surpasses 1 minute, more than the electrochemical AC impedance value reaches 8000 Ω;
(5) in treatment solution, organosilane content is few, and the treatment time is short, can not cause painting effect poor because of the blocked up reduction surface conduction of rete ability;
(6) the present invention and traditional electrophoresis negative electrode coating process and equipment are basic identical, technical process is simple, film forming is rapid, only need to add one drying and processing step and reduced table and transferred processing step, after conversion film is processed, the program of washing can be according to the requirement of follow-up industry, regulate and adopt voluntarily, can effectively reduce the quantity discharged of process water;
(7) with an organic solvent do not reduced fire risk in preparation process of the present invention, and the metal-salt that the phosphatization composition uses is cheap with respect to rare-earth salts, has more promotional value and economic benefit;
(8) treatment solution provided by the invention produces without sediment in treating processes, need not that treatment trough is carried out regular slagging-off and processes.
Embodiment:
Embodiment 1: treatment solution calculates according to 1000g.At 30 ℃ of temperature, add 780g water in reaction flask 1, after starting to stir, with the speed of 10g/min, add 120g KH560, uniform stirring was made A liquid (the organosilane aqueous solution) in 30 minutes.
At 30 ℃ of temperature, add 90g water in reaction flask 2, after starting stirring, add 6g phosphoric acid with the speed of 1g/ minute, then add 1g zinc oxide, stir to make in 10 minutes and mix, speed with 0.5g/min adds the 1g nickelous nitrate successively again, 1g manganous nitrate, 1g Iron nitrate.Stir and made B liquid in 30 minutes.
B liquid is slowly added uniformly in the reaction flask that A liquid is housed and at the uniform velocity stirs, stir the treatment solution that obtains preparing after 30 minutes.
The technical process that the swimming of heat zinc coating plate cathode of surface is taked is: pre-degreasing → degreasing → washing → oven dry → surface treatment → electrophoresis.
This implementing process is simple, carries out before electrophoresis need not showing to transfer, and the pretreatment liquid of configuration is placed after three months without sediment, good stability.The processing parameter of taking during electrophoresis is voltage 150V, 2 minutes time, 35 ℃ of temperature.Salt mist experiment rear electrophoresis coating surface was drawn fork place corrosion width less than 1cm in 1000 hours.Impulse withstand test finds that paint film drift recess does not have pull-away.It is 1 grade that adhesion test tests out paint film adhesion.
Embodiment 2: treatment solution calculates according to 1000g.At 30 ℃ of temperature, add 750g water in reaction flask 1, after starting to stir, with the speed of 10g/min, add 150gKH560, uniform stirring was made A liquid (the organosilane aqueous solution) in 30 minutes.
At 30 ℃ of temperature, add 90g water in reaction flask 2, after starting stirring, add 7g phosphoric acid with the speed of 1g/ minute, then add 1g zinc oxide, stir to make in 10 minutes and mix, speed with 0.5g/min adds the 0.5g nickelous nitrate successively again, 0.5g manganous nitrate, 1g Iron nitrate.Stir and made B liquid in 30 minutes.
The technical process that the swimming of heat zinc coating plate cathode of surface is taked is: pre-degreasing → degreasing → washing → oven dry → surface treatment → electrophoresis.
This implementing process is simple, carries out before electrophoresis need not showing to transfer, and the pretreatment liquid of configuration is placed after three months without sediment, good stability.The processing parameter of taking during electrophoresis is voltage 150V, 2 minutes time, 35 ℃ of temperature.Salt mist experiment rear electrophoresis coating surface was drawn fork place corrosion width less than 1cm in 1000 hours.Impulse withstand test finds that paint film drift recess does not have pull-away.It is 1 grade that adhesion test tests out paint film adhesion.
Embodiment 3: the electrophoresis pretreatment liquid is calculated according to 1000g.At 30 ℃ of temperature, add 800g water in reaction flask 1, after starting to stir, with the speed of 10g/min, add 100gKH560, uniform stirring was made A liquid (the organosilane aqueous solution) in 30 minutes.
At 30 ℃ of temperature, add 90g water in reaction flask 2, after starting stirring, add 6g phosphoric acid with the speed of 1g/ minute, then add 1g zinc oxide, stir to make in 10 minutes and mix, speed with 0.5g/min adds the 1g nickelous nitrate successively again, 1g manganous nitrate, 1g Iron nitrate.Stir and made B liquid in 30 minutes.
B liquid is slowly added uniformly in the reactor that A liquid is housed and at the uniform velocity stirs, stir the treatment solution that obtains preparing after 30 minutes.
The technical process that the swimming of heat zinc coating plate cathode of surface is taked is: pre-degreasing → degreasing → washing → oven dry → surface treatment → electrophoresis.
This implementing process is simple, carries out before electrophoresis need not showing to transfer, and the pretreatment liquid of configuration is placed after three months without sediment, good stability.The processing parameter of taking during electrophoresis is voltage 150V, 2 minutes time, 35 ℃ of temperature.Salt mist experiment rear electrophoresis coating surface was drawn fork place corrosion width less than 1cm in 1000 hours.Impulse withstand test finds that paint film drift recess does not have pull-away.It is 1 grade that adhesion test tests out paint film adhesion.
Embodiment 4: treatment solution calculates according to 1000g.At 30 ℃ of temperature, add 800g water in reaction flask 1, after starting to stir, with the speed of 10g/min, add 100gKH560, uniform stirring was made A liquid (the organosilane aqueous solution) in 30 minutes.
At 30 ℃ of temperature, add 90g water in reaction flask 2, after starting stirring, with the speed of 1g/ minute, add 7g phosphoric acid, then add 1.5g zinc oxide, stirred 10 minutes, then add successively the 1g nickelous nitrate with the speed of 0.5g/min, 1g manganous nitrate, 0.5g Iron nitrate.Stir and made B liquid in 30 minutes.
B liquid is slowly added uniformly in the reactor that A liquid is housed and at the uniform velocity stirs, stir the treatment solution that obtains preparing after 30 minutes.
The technical process that the swimming of heat zinc coating plate cathode of surface is taked is: pre-degreasing → degreasing → washing → oven dry → surface treatment → electrophoresis.
This implementing process is simple, carries out before electrophoresis need not showing to transfer, and the pretreatment liquid of configuration is placed after three months without sediment, good stability.The processing parameter of taking during electrophoresis is voltage 150V, 2 minutes time, 35 ℃ of temperature.Salt mist experiment rear electrophoresis coating surface was drawn fork place corrosion width less than 1cm in 1000 hours.Impulse withstand test finds that paint film drift recess does not have pull-away.It is 1 grade that adhesion test tests out paint film adhesion.
Claims (1)
1. one kind is used for tide of motorism galvanized sheet cathode of surface swimming pretreatment liquid, it is characterized in that this treatment solution forms and the quality percentage composition is as follows:
Organosilane: 10 ~ 20%, the phosphatization component: 5 ~ 10%, all the other are deionized water;
The composition of described phosphatization component and every liter of content thereof are as follows:
Manganous nitrate 0.8 ~ 1g/L
Zinc oxide 0.8 ~ 1.2g/L
Phosphoric acid 5 ~ 15g/L
Nickelous nitrate 0.8 ~ 1g/L
Ferrous phosphate 0.8 ~ 1.5g/L;
Described organosilane is 3-(2,3-epoxy the third oxygen) propyl trimethoxy silicane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310364134.7A CN103397320B (en) | 2013-08-20 | 2013-08-20 | Cathodic electrophoresis pre-treatment liquor used on surface of hot-galvanized plate of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310364134.7A CN103397320B (en) | 2013-08-20 | 2013-08-20 | Cathodic electrophoresis pre-treatment liquor used on surface of hot-galvanized plate of automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103397320A true CN103397320A (en) | 2013-11-20 |
| CN103397320B CN103397320B (en) | 2015-07-15 |
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| CN105925970A (en) * | 2016-07-14 | 2016-09-07 | 南京科润工业介质股份有限公司 | Surface treatment agent used before metal material cathode electrophoresis coating |
| CN107502879A (en) * | 2017-09-27 | 2017-12-22 | 荆门市拓达科技有限公司 | One kind is used for metallic surface inorganic agent and preparation method thereof |
| CN107699880A (en) * | 2017-09-28 | 2018-02-16 | 荆门市拓达科技有限公司 | Die casting aluminium chrome-free phosphating agent and preparation method thereof |
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| EP3428314B1 (en) * | 2017-07-14 | 2019-11-13 | Ewald Dörken Ag | Composition and method for passivating galvanized components |
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| CN107502879A (en) * | 2017-09-27 | 2017-12-22 | 荆门市拓达科技有限公司 | One kind is used for metallic surface inorganic agent and preparation method thereof |
| CN107699880A (en) * | 2017-09-28 | 2018-02-16 | 荆门市拓达科技有限公司 | Die casting aluminium chrome-free phosphating agent and preparation method thereof |
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| CN103397320B (en) | 2015-07-15 |
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