CN105063532B - A kind of high corrosion-resistant list plating type zinc-aluminum-magnesium rare earth protective coating and preparation process - Google Patents
A kind of high corrosion-resistant list plating type zinc-aluminum-magnesium rare earth protective coating and preparation process Download PDFInfo
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- CN105063532B CN105063532B CN201510504556.9A CN201510504556A CN105063532B CN 105063532 B CN105063532 B CN 105063532B CN 201510504556 A CN201510504556 A CN 201510504556A CN 105063532 B CN105063532 B CN 105063532B
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 57
- 238000007747 plating Methods 0.000 title claims abstract description 55
- -1 zinc-aluminum-magnesium rare earth Chemical class 0.000 title claims abstract description 54
- 239000011253 protective coating Substances 0.000 title claims abstract description 46
- 238000005260 corrosion Methods 0.000 title claims abstract description 37
- 230000007797 corrosion Effects 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 16
- 239000011777 magnesium Substances 0.000 claims abstract description 16
- 230000005496 eutectics Effects 0.000 claims abstract description 14
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims abstract description 12
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 11
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 10
- 239000000956 alloy Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 229910017708 MgZn2 Inorganic materials 0.000 claims abstract description 7
- 239000007769 metal material Substances 0.000 claims description 38
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910021626 Tin(II) chloride Inorganic materials 0.000 claims description 5
- 229910001627 beryllium chloride Inorganic materials 0.000 claims description 5
- 229910052681 coesite Inorganic materials 0.000 claims description 5
- 229910052906 cristobalite Inorganic materials 0.000 claims description 5
- 238000005202 decontamination Methods 0.000 claims description 5
- 230000003588 decontaminative effect Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052682 stishovite Inorganic materials 0.000 claims description 5
- 229910052905 tridymite Inorganic materials 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 239000011592 zinc chloride Substances 0.000 claims description 2
- AXZWODMDQAVCJE-UHFFFAOYSA-L tin(II) chloride (anhydrous) Chemical compound [Cl-].[Cl-].[Sn+2] AXZWODMDQAVCJE-UHFFFAOYSA-L 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 18
- 239000011248 coating agent Substances 0.000 abstract description 17
- 239000011701 zinc Substances 0.000 abstract description 15
- 150000003839 salts Chemical class 0.000 abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 abstract description 6
- 239000011159 matrix material Substances 0.000 abstract description 6
- 229910000861 Mg alloy Inorganic materials 0.000 abstract description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000007812 deficiency Effects 0.000 abstract description 3
- 238000000280 densification Methods 0.000 abstract description 3
- 238000003618 dip coating Methods 0.000 abstract description 2
- 238000009713 electroplating Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 7
- 239000004094 surface-active agent Substances 0.000 description 7
- 150000002910 rare earth metals Chemical class 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 4
- 125000005227 alkyl sulfonate group Chemical group 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 229910001051 Magnalium Inorganic materials 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 150000002191 fatty alcohols Chemical class 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910018134 Al-Mg Inorganic materials 0.000 description 1
- 229910018467 Al—Mg Inorganic materials 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010960 commercial process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 230000005352 galvanomagnetic phenomena Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
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- Coating With Molten Metal (AREA)
Abstract
The invention discloses a kind of high corrosion-resistant list plating type zinc-aluminum-magnesium rare earth protective coating and preparation process, single plating type zinc-aluminum-magnesium rare earth protective coating technique of the invention can utilize single hot dip coating method to obtain zinc-aluminium Mg Alloy Coating in metal surface.Coating and the original performance of each self-sustaining of metallic matrix, but possess more than 99.9% metallurgical bonding interface, at the same coating structure densification, stable components, without plating leakage, excellent corrosion-proof performance, salt air corrosion is up to 2060h.Alloy layer corrosion resisting property is good compared with conventional hot-dip pure zinc layer, improves service life.The list plating type technique, reusable and industrialized production, overcome metal helps plating difficult with zinc-aluminium liquid magnesium alloy, it is difficult between the two to form excellent combination interface, be also easy to produce the deficiencies of plating leakage, it can be widely used in metal surface and prepare 5% 12%Al, the zinc-aluminum-magnesium alloy electroplating bath of 1% 6%Mg contents, prepared co-penetration layer forms Zn/Al/MgZn2Ternary eutectic and polytype binary eutectic body are that co-penetration layer has the main reason for high corrosion resistance.
Description
Technical field：
The present invention relates to steel material surface plating technic technical field, more particularly to a kind of high corrosion-resistant list plating type zinc-aluminium
Magnesium rare earth protective coating and preparation process.
Background technology：
Conventional metals matrix plating zinc protective layer is influenced be subject to natural environment deterioration and transmission line of electricity electromagnetic environment, corrosion speed
Rate is accelerated increasingly, substantially reduces its service life, (such as coastal area, Acid Rain Area, industrial pollution area in heavy corrosion environment
Deng), it has to integral replacing is carried out, considerably increases maintenance cost, reduces electric network security.Especially in highfield, thunder
It hits and waits in electromagnetic fields environment, galvanomagnetic-effect can aggravate the corrosion of coating.Metallic matrix is using zinc-aluminum-magnesium rare earth protective coating than pure
Zinc protective coating possesses superior corrosion resisting property, becomes current research hotspot.In commercial process, aluminium, magnesium, rare earth
Height is required with metallic matrix base steel precursor reactant, the surface quality of protective layer is not only influenced whether, but also protective layer can be caused to adhere to
Property decline cause plating leakage.
[the Computational design and optimization of such as Samuel R.Cross.
multilayered and functionally graded corrosion coatings.Corrosion
Science.2013,77,297-307] have studied the corrosion-resistant influence of zinc-aluminum-magnesium alloy-layer, it is indicated that Al, Mg are to protecting layer surface shadow
It rings and the corrosion resisting property of protective layer entirety is promoted.[the Chemistry of corrosion products on such as S.Sch ü rz
Zn-Al-Mg alloy coated steel.Corrosion Science.2010,52 (10), 3271-3279] prepare height
Al, Mg match zinc-aluminum-magnesium layer, have excellent corrosion resisting property.
The content of the invention：
In order to solve, technological requirement existing for dip galvanized aluminum magnesium in the prior art is high, coating surface is uneven, can not shape
Into the deficiencies of high-performance infiltration layer and problem, the present invention provides a kind of aluminium, content of magnesium suitable for metal material be high, thickness of coating
Comply with standard, bond strength height, high corrosion-resistant, suitable for industrialization promotion production high corrosion-resistant list plating type zinc-aluminum-magnesium rare earth prevent
Protect coating and preparation process.
To achieve these goals, the present invention uses following technical scheme：
A kind of preparation process of high corrosion-resistant list plating type zinc-aluminum-magnesium rare earth protective coating, pretreated metal material is existed
Hot-dip is carried out in the presence of single plating type fluxing agent, then hot submersion processing is carried out to get surface in zinc-aluminium magnesium-rare earth alloy solution
It is coated with the metal material of zinc-aluminum-magnesium rare earth protective coating.
Specifically comprise the following steps：
1) by metallic matrix decontamination, oil removing；
2) to step 1) treated metal material carries out polishing processing of rust removing, derusting grade is not less than Sa21/2Grade；
3) by fluxing agent and step 2), treated that metal material is placed in container, heats 0.2-0.5min, heating temperature
For 70 DEG C -85 DEG C；
4) by step 3), treated that metal material is placed in zinc-aluminium magnesium-rare earth alloy liquid, heats 0.5-3min, heating temperature
Spend for 400 DEG C -470 DEG C to get.
Al 5-12%, Mg 1-6% in zinc-aluminum-magnesium rare earth protective coating prepared by the present invention, prepared zinc-aluminum-magnesium rare earth
Protective coating forms Zn/Al/MgZn2Ternary eutectic and polytype binary eutectic body are zinc-aluminum-magnesium rare earth protective coatings
The main reason for high corrosion resistance.
The parts by weight for obtaining each component of single plating type zinc-aluminum-magnesium rare earth protective coating are：Al 5-8%, Mg 1-6%,
Zn76-96%, rare earth element 0.1%-0.5%, remaining is metal base..
Preferably, in step 1), the oil removal treatment is at 90 DEG C -100 DEG C, is distinguished with NaOH solution and clear water clear
Wash metal material.
The optimum temperature of quickening liquid is 70 DEG C -85 DEG C in the present invention, and temperature is relatively low, and fluxing agent attachment is uneven and plating is helped to imitate
Fruit is bad；Temperature is higher, then fluxing agent attachment is too thick, increases consumption.If the thicker fluxing agent of attachment zinc gray on workpiece is produced certainly
Life can reduce.But then into minus effect when too thick.
The attached layer of fluxing agent that 0.2-0.5min can be got well generally is needed in the present invention, metal material is also allowed fully to heat with
Help drying.
Preferably, in step 3), the heating temperature is 410 DEG C -460 DEG C.
Preferably, in step 3), the parts by weight for obtaining each component in single plating type zinc-aluminium magnesium-rare earth alloy liquid are：Al
5-12%, Mg 1-6%, Zn 76-96%, rare earth element 0.1%-0.5%..
Preferably, in step 3), in single plating type zinc-aluminum-magnesium rare earth fluxing agent, the grain size of each component is less than 70 μ
m.Particle is small, ensures that each component is uniformly dispersed in fluxing agent, improves reactivity.
Preferably, in step 3), single plating type fluxing agent is ZnCl230-40%；NaF 1-3%；KHF25-
8%；PCl30.5-1.0%；SnCl22-3%；BeCl21-1.5%；SiO20.5-1.5%；ZnMnO40.05-0.1%；Composite table
Face activating agent 1%, remaining is water.Wherein ZnMnO4Effect is to form hydrate with other compositions, promotes hot-dip process；It is compound
Surfactant is alkylsulfonate, fatty alcohol ether phosphate ester salt, the compound of N- alkyl amino dipropionic acids.
Single plating type zinc-aluminum-magnesium rare earth protective coating prepared by any of the above-described method, thickness are 85-120 μm.Thinner thickness
Plating leakage phenomenon easily occurs, thickness is excessively high, and the corrosion resistance of metal material is promoted less, not only easily makes brittle coating, but also expends big
Measure the energy and raw material.The thickness of currently preferred list plating type zinc-aluminum-magnesium rare earth protective coating is 85-120 μm.
The application of single plating type zinc-aluminum-magnesium rare earth protective coating prepared by the above method in manufacture grid power transmission steel tower protection.
The advantageous effects of the present invention：
1. the present invention is provided for single plating type zinc-aluminum-magnesium guard technology with high alumina, high content of magnesium, high corrosion-resistant, combination
Densification, coating morphology is excellent, bond strength is high, realizes that the plating of metal material surface single can prepare zinc-aluminum-magnesium coating.The preparation
Method is at low cost, prepared by easy industrialized production.
2. protective coating prepared by the present invention has carried out neutral salt spray test test, the results showed that the rust spot time occur is
2060h, and it is only 140h that the rust spot time, which occurs, in traditional galvanizing, therefore, possesses the requirement used under the conditions of exceedingly odious,
It is used widely in grid power transmission steel tower is manufactured.
3. Al 5-12%, Mg 1-6% in zinc-aluminum-magnesium rare earth protective coating prepared by the present invention, prepared zinc-aluminum-magnesium are dilute
Native protective coating forms Zn/Al/MgZn2Ternary eutectic and polytype binary eutectic body are co-penetration layers with high anti-corrosion
The main reason for performance.
4. single plating type zinc-aluminum-magnesium rare earth protective coating technique of the present invention can utilize single hot dip coating method in metal watch
Face obtains zinc-aluminium Mg Alloy Coating.Coating and the original performance of each self-sustaining of metallic matrix, but it is metallurgical to possess more than 99.9%
Combination interface, at the same coating structure densification, stable components, without plating leakage, excellent corrosion-proof performance, salt air corrosion reaches 2060h.Alloy Plating
Layer corrosion resisting property is good compared with conventional hot-dip pure zinc layer, improves service life.The list plating type technique, reusable and industrialization
Production overcomes metal and helps plating difficult with zinc-aluminium liquid magnesium alloy, difficult between the two to form excellent combination interface, be also easy to produce plating leakage etc.
Deficiency can be widely used in the zinc-aluminum-magnesium alloy electroplating bath that metal surface prepares 5%-12%Al, 1%-6%Mg content.
Description of the drawings
The mono- rare earth coated Cross Section Morphologies of plating type zinc-aluminum-magnesium of Fig. 1
Specific embodiment：
It is further illustrated with reference to embodiment：
Embodiment 1：A kind of high corrosion-resistant list plating type zinc-aluminum-magnesium rare earth protective coating, includes the following steps：
1) dirt of decontamination metal material surface, be respectively washed metal material 3 times with NaOH solution and clear water at 85 DEG C,
Remove the grease of metal material surface；
2) to step 1) treated metal material carries out polishing processing of rust removing, derusting grade is not less than Sa21/2Grade；
3) it is ZnCl by single plating type fluxing agent230%；NaF 1%；KHF25%；PCl30.5%；SnCl22%；
BeCl21%；SiO20.5%；ZnMnO40.05%；Complexed surfactant 1%, remaining is water, wherein ZnMnO4Effect be with
Other compositions form hydrate, promote hot-dip process；Complexed surfactant is alkylsulfonate, fatty alcohol ether phosphate
The compound of salt, N- alkyl amino dipropionic acids.Treated that metal material is placed in container with step 2), heats 0.5min, adds
Hot temperature is 70 DEG C；
4) by step 3), treated that metal material is placed in zinc-aluminium magnesium-rare earth alloy liquid, heats 3min, and heating temperature is
410 DEG C to get；
The parts by weight for obtaining each component of single plating type zinc-aluminum-magnesium rare earth protective coating are：Al 5%, Mg 1%, Zn
92%th, rare earth metal 0.3%, remaining is metal base.Prepared zinc-aluminum-magnesium rare earth protective coating forms Zn/Al/MgZn2Three
First eutectic and polytype binary eutectic body are that zinc-aluminum-magnesium rare earth protective coating has the main reason for high corrosion resistance.
Prepared single plating type zinc-aluminum-magnesium rare earth protective coating, thickness is about 85-95 μm.
Research is found：When magnalium ratio is 5 in protective coating:When 1, when thickness of coating is 85-95 μm, metal material surface
Obtain preferable corrosion resistance.
Embodiment 2：A kind of high corrosion-resistant list plating type zinc-aluminum-magnesium rare earth protective coating, includes the following steps：
1) dirt of decontamination metal material surface, be respectively washed metal material 3 times with NaOH solution and clear water at 80 DEG C,
Remove the grease of metal material surface；
2) to step 1) treated metal material carries out polishing processing of rust removing, derusting grade is not less than Sa21/2Grade；
3) it is ZnCl by single plating type fluxing agent235%；NaF 2%；KHF26.5%；PCl30.75%；SnCl22.5%；
BeCl21.2%；SiO21%；ZnMnO40.075%；Complexed surfactant 1%, remaining is water, wherein ZnMnO4Effect be with
Other compositions form hydrate, promote hot-dip process；Complexed surfactant is alkylsulfonate, fatty alcohol ether phosphate
The compound of salt, N- alkyl amino dipropionic acids.Treated that metal material is placed in container with step 2), heats 0.3min, adds
Hot temperature is 75 DEG C；
4) by step 3), treated that metal material is placed in that zinc-aluminum-magnesium is closed in rare earth gold liquid, heats 2min, heating temperature is
430 DEG C to get；
The parts by weight for obtaining each component of single plating type zinc-aluminum-magnesium rare earth protective coating are：Al 7.8%, Mg 2%, Zn
90%, rare earth metal 0.2%.Prepared zinc-aluminum-magnesium rare earth protective coating forms Zn/Al/MgZn2Ternary eutectic and a variety of
The binary eutectic body of type is that zinc-aluminum-magnesium rare earth protective coating has the main reason for high corrosion resistance.
Prepared single plating type zinc-aluminum-magnesium rare earth protective coating, thickness is about 95-105 μm.
Research is found：When magnalium ratio is 3.9 in protective coating:When 1, when thickness of coating is 95-105 μm, metal material
Surface obtains preferable corrosion resistance.
Embodiment 3：A kind of high corrosion-resistant list plating type zinc-aluminum-magnesium rare earth protective coating, includes the following steps：
1) dirt of decontamination metal material surface, be respectively washed metal material 3 times with NaOH solution and clear water at 85 DEG C,
Remove the grease of metal material surface；
2) to step 1) treated metal material carries out polishing processing of rust removing, derusting grade is not less than Sa21/2Grade；
3) it is ZnCl by single plating type fluxing agent240%；NaF 3%；KHF28%；PCl31.0%；SnCl23%；
BeCl21.5%；SiO21.5%；ZnMnO40.1%；Complexed surfactant 1%, remaining is water, wherein ZnMnO4Effect be with
Other compositions form hydrate, promote hot-dip process；Complexed surfactant is alkylsulfonate, fatty alcohol ether phosphate
The compound of salt, N- alkyl amino dipropionic acids.Treated that metal material is placed in container with step 2), heats 0.2min, adds
Hot temperature is 85 DEG C；
4) by step 3), treated that metal material is placed in zinc-aluminium liquid magnesium alloy, heats 0.5min, heating temperature 460
DEG C to get；
The parts by weight for obtaining each component of single plating type zinc-aluminum-magnesium rare earth protective coating are：Al 12%, Mg 6%, Zn
76%, rare earth metal 0.5%, remaining is metal base.Prepared zinc-aluminum-magnesium rare earth protective coating forms Zn/Al/MgZn2Three
First eutectic and polytype binary eutectic body are that zinc-aluminum-magnesium rare earth protective coating has the main reason for high corrosion resistance.
Prepared single plating type zinc-aluminum-magnesium rare earth protective coating, thickness is about 105-120 μm.
Research is found：When magnalium ratio is 2 in protective coating:When 1, when thickness of coating is 105-120 μm, metal material table
Face obtains preferable corrosion resistance.I.e. in the range of almag configuration proportion of the present invention, almag ratio with
Target thickness of coating is into subtraction function relation.
Performance test：
The ternary co-osmosized layer of zinc-aluminum-magnesium prepared in the embodiment of the present invention is tested through neutral salt spray test, the results showed that：Implement
The rust spot time of occurrence of single plating type zinc-aluminum-magnesium rare earth protective coating prepared by example 1-3 is all more than 2060h.
The list rare earth coated Cross Section Morphology of plating type zinc-aluminum-magnesium of the invention is as shown in Figure 1, concrete analysis result such as following table：
Treatment Options：All elements (normalization) are analyzed
All results shown by weight percentage
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (3)
1. a kind of preparation process of high corrosion-resistant list plating type zinc-aluminum-magnesium rare earth protective coating, which is characterized in that will be pretreated
Metal material carries out hot-dip in the presence of single plating type fluxing agent, then is carried out in zinc-aluminium magnesium-rare earth alloy solution at hot submersion
Reason is coated with the metal material of zinc-aluminum-magnesium rare earth protective coating to get surface；
Specifically comprise the following steps：
1）By metal material decontamination, oil removing；
2）To step 1）Treated, and metal material carries out polishing processing of rust removing, and derusting grade is not less than Sa21/2Grade；
3）By fluxing agent and step 2）Treated, and metal material is placed in container, heats 0.2-0.5min, heating temperature 70
℃-85℃；
4）By step 3）Treated, and metal material is placed in zinc-aluminium magnesium-rare earth alloy liquid, heats 0.5-3min, and heating temperature is
410 DEG C -460 DEG C to get；
Step 4）In, the parts by weight of each component are in the zinc-aluminium magnesium-rare earth alloy liquid：Al 5-8%、Mg 1-6%、Zn
76-93.5%, rare earth element 0.1%-0.5%；
The oil removal treatment is at 90 DEG C -95 DEG C, and metal material is cleaned with NaOH solution；
Step 4）In, the parts by weight for obtaining each component of single plating type zinc-aluminum-magnesium rare earth protective coating are：Al 5-12%、Mg
1-6%, Zn 76-96%, rare earth element 0.1%-0.5%, remaining is metal base；
In single plating type fluxing agent, the grain size of each component is less than 70 μm；
The weight part ratio of each component is in single plating type fluxing agent：ZnCl230-40%；NaF 1-3%；KHF25-8%；
PCl30.5-1.0%；SnCl2 2-3%；BeCl21-1.5%；SiO20.5-1.5%；ZnMnO4 0.05-0.1%；Composite surface is lived
Property agent 1%, remaining is water；
The zinc-aluminum-magnesium rare earth protective coating is by Zn/Al/MgZn2Ternary eutectic and polytype binary eutectic body composition.
2. single plating type zinc-aluminum-magnesium protective coating prepared by technique described in claim 1, which is characterized in that the list plating type zinc-aluminum-magnesium
The thickness of protective coating is 85-120 μm.
3. application of single plating type zinc-aluminum-magnesium protective coating in grid power transmission steel tower is manufactured described in claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510504556.9A CN105063532B (en) | 2015-08-17 | 2015-08-17 | A kind of high corrosion-resistant list plating type zinc-aluminum-magnesium rare earth protective coating and preparation process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510504556.9A CN105063532B (en) | 2015-08-17 | 2015-08-17 | A kind of high corrosion-resistant list plating type zinc-aluminum-magnesium rare earth protective coating and preparation process |
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| Publication Number | Publication Date |
|---|---|
| CN105063532A CN105063532A (en) | 2015-11-18 |
| CN105063532B true CN105063532B (en) | 2018-05-29 |
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| CN102373401A (en) * | 2010-08-21 | 2012-03-14 | 中国石油化工股份有限公司 | Method for preparing alloy coating on iron and steel surface |
| CN104178719A (en) * | 2014-09-02 | 2014-12-03 | 国家电网公司 | Method for carrying out hot-dipping on aluminum-zinc alloy on steel surface |
| CN104404444A (en) * | 2014-11-05 | 2015-03-11 | 西安航空动力股份有限公司 | Alumina powder for solid aluminizing agent, processing method thereof, and aluminizing technology using aluminizing agent of alumina powder |
| CN104611667A (en) * | 2015-01-27 | 2015-05-13 | 国家电网公司 | Co-permeation agent for rare-earth co-permeation layers of zinc, aluminum and magnesium |
| CN104630697A (en) * | 2014-12-17 | 2015-05-20 | 国家电网公司 | Zinc/aluminum/magnesium three-element co-permeation layer and preparation method thereof |
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| US20120118437A1 (en) * | 2010-11-17 | 2012-05-17 | Jian Wang | Zinc coated steel with inorganic overlay for hot forming |
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|---|---|---|---|---|
| CN102373401A (en) * | 2010-08-21 | 2012-03-14 | 中国石油化工股份有限公司 | Method for preparing alloy coating on iron and steel surface |
| CN104178719A (en) * | 2014-09-02 | 2014-12-03 | 国家电网公司 | Method for carrying out hot-dipping on aluminum-zinc alloy on steel surface |
| CN104404444A (en) * | 2014-11-05 | 2015-03-11 | 西安航空动力股份有限公司 | Alumina powder for solid aluminizing agent, processing method thereof, and aluminizing technology using aluminizing agent of alumina powder |
| CN104630697A (en) * | 2014-12-17 | 2015-05-20 | 国家电网公司 | Zinc/aluminum/magnesium three-element co-permeation layer and preparation method thereof |
| CN104611667A (en) * | 2015-01-27 | 2015-05-13 | 国家电网公司 | Co-permeation agent for rare-earth co-permeation layers of zinc, aluminum and magnesium |
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