CN108395742A - A kind of aperture is in obturator-type anti-corrosive metal coating, the preparation method and use of normal distribution - Google Patents
A kind of aperture is in obturator-type anti-corrosive metal coating, the preparation method and use of normal distribution Download PDFInfo
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- CN108395742A CN108395742A CN201810451919.0A CN201810451919A CN108395742A CN 108395742 A CN108395742 A CN 108395742A CN 201810451919 A CN201810451919 A CN 201810451919A CN 108395742 A CN108395742 A CN 108395742A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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Abstract
The invention discloses the obturator-type anti-corrosive metal coating that a kind of aperture is in normal distribution, the anti-corrosive metal coating has closed pore, does not include through-hole, the aperture of the closed pore meets normal distribution：
Description
Technical field
The invention belongs to metal material technologies more particularly to a kind of aperture to be applied in the obturator-type anti-corrosion of metal of normal distribution
Layer, preparation method and use.
Background technology
Reinforced concrete structure will be one of most common structure type within the long duration from now on.However for length
Phase is in the environment such as seawater, sea wind, that is, in the wet environment of high corrosion (being full of chlorion), in concrete structure
Reinforcing bar is subject to corrosion failure.Especially in the concrete of splash zone, its surface is constantly in drying and watering cycle, concrete
Salt concentration gradually increases in drying and watering cycle in surface pore.Under concentration difference effect, salinity is further into concrete
Table penetrates into, until rebar surface, causes to corrode.And once destroy, repair can be highly difficult or even serious to can not repair.Cause
This, the long-term corrosion of prevention of marine concrete structures is currently urgently to solve the problems, such as.
Currently, metal coating techniques are a kind of anti-corrosion methods of efficient and cost-effective, wherein the research of ceramic coating technology
Time is long, and technical maturity is high, and 1) advantage mainly has relative to organic coating, have Diamond Search (volatile organic matter) discharge,
Compare environmentally friendly；2) internal structure is fine and close, and physical isolation is good.It has been widely used in the anti-corrosion protection field of metal base.
But coat inside, because of the crystallization water, the evaporation meeting self-assembling formation hole of free water and gas, hole is divided into through-hole and closed pore, institute
The through-hole stated refers to that interconnected hole makes coating outer surface be connected with base metal surface, and the closed pore refers to only
Vertical cap holes, and do not communicated with extraneous or remaining hole.The presence of through-hole will guide external corrosion substance to penetrate into and apply
The internal through rebar surface of layer, is partially formed pit corrosion, to reduce the corrosion resistance of coating in reinforcing bar.Chinese patent
CN105670366A discloses a kind of low pass porosity coating and its painting method for steel bar anti-corrosion, although wherein accomplishing to apply
The through-hole rate of layer reduces but does not reach still the state of no through-hole.In addition, must be solved when coating is applied to rebar surface
A certainly practical problem：Can the ductility of coating meet the dilatation requirement of reinforcing bar.Specifically, in actual building iron
In application, building iron stress will produce deformation, strain value arrives thousands of a microstrains hundreds of.Protection outside coated on reinforcing bar applies
Layer is inevitably as reinforcing bar deforms upon.Once reinforcing bar is when in use, strain is excessive to reach deformation limit, can lead to coating
Cracking, seawater (chlorion for being mingled with corrosion reinforcing bar) will touch rebar surface along the crack of coating, to drop significantly
The Corrosion Protection of low coating.This just needs coating with comparable ductility to maintain the protection to reinforcing bar.
Invention content
In order to overcome the disadvantages and deficiencies of the prior art, the purpose of the present invention is to provide a kind of apertures in normal distribution
Obturator-type anti-corrosive metal coating, is suitable for the anti-corrosion of metal field under corrosive environment, such as salt-soda soil, underground piping, and ocean is put down
Platform etc..The coating of the present invention have the characteristics that ductility height, wearability is good, good corrosion resistance, can be with reinforcing bar compatible deformation.
The present invention is achieved by the following technical solutions：
The first purpose of the invention is to provide the obturator-type anti-corrosive metal coating that a kind of aperture is in normal distribution, the paintings
Layer composition include by weight：55-70 parts of silicon oxide compound, 20-35 parts of coefficient of thermal expansion conditioning agent, 3-9 parts of binder, oxygen
Change 1-2 parts of 3-9 parts of alumina gel presoma, 1-3 parts of catalyst and chelating agent.The alumina gel presoma is selected from nine hydrations
Any one or more in aluminum nitrate, Aluminium chloride hexahydrate, aluminium isopropoxide, aluminium secondary butylate.
The coating has closed pore, does not include through-hole, and the closed pore refers to independent cap holes, and not with it is extraneous or
Remaining hole communicates, and the aperture of the closed pore meets normal distribution：
F (x) represents the distributive law in the aperture of closed pore, no unit；X represents the aperture of closed pore, and unit is rice (m)；Join position
Number μ represents the average value in aperture, and range is 0.00003-0.00005, and unit is rice (m)；Scale parameter is that σ represents aperture
The amplitude of distribution, range are 0.000005-0.00001, no unit.That is the distribution Normal Distribution in closed pore aperture.
Further, the silicon oxide compound is selected from any one of quartz sand, diatomite, quartz, tridymite, cristobalite
Or it is several.And the silicon oxide compound need to be superfines, can be sieved with 1000-2000 mesh, preferably 1100-1400 mesh.
Further, the coefficient of thermal expansion conditioning agent is selected from sodium metasilicate, potassium metasilicate, lithium metasilicate, titanium dioxide,
Zirconium oxide, vanadium oxide, any one or a few in scandium oxide.
Further, binder be selected from chromous oxide, chrome green, nickel monoxide, nickel sesquioxide, manganese monoxide,
Any one or a few in manganese dioxide, cobalt black, cobalt sesquioxide.
Further, the catalyst in propylene oxide, hydrochloric acid, sulfuric acid, ammonium hydroxide, sodium hydroxide any one or
It is several.
Further, the chelating agent be selected from glacial acetic acid, ethyl acetoacetate, acetylacetone,2,4-pentanedione any one or a few.
Further, when being used for steel bar anti-corrosion, with higher ductility, it is micro- that ultimate tensile strength can reach 1000-2200
Strain, and the corrosion resistance that can significantly improve metal reaches 10-12 times.The coating is obturator-type structure, so coating
Deformation range is bigger, allows coating will not can not tension because rigidity is too big.So the ultimate tensile strength of this coating slightly compares steel
Muscle is larger, and stretching can be cooperateed with reinforcing bar, has higher ductility.
Further, as any one currently preferred embodiment, anti-corrosive metal coating of the present invention
Preparation method includes the following steps：
1) it grinds for the first time：By 55-70 parts of silicon oxide compound, 20-35 parts of coefficient of thermal expansion conditioning agent, glue
Tie 3-9 parts of grind into powder of agent；
2) batch mixing is prepared：3-9 parts of alumina gel presoma, 1-3 parts of catalyst, chelating agent 1-2 is added in above-mentioned raw materials
Part and water are mixed to obtain batch mixing；
3) dry：The batch mixing drying that step 2) is obtained；
4) it grinds for second：The batch mixing that step 3) is obtained is regrind into powder；
5) it coats：Step 4) is obtained into powder coating on parent metal；
6) it is sintered：The parent metal high temperature sintering coated with powder that step 5) is obtained, obtains a kind of hole
Diameter is in the obturator-type of normal distribution in the obturator-type anti-corrosive metal coating of normal distribution and with a kind of aperture
The metal product of anti-corrosive metal coating.
The composition of the coating includes by weight：55-70 parts of silicon oxide compound, 20-35 parts of coefficient of thermal expansion conditioning agent,
1-2 parts of 3-9 parts of binder, 3-9 parts of alumina gel presoma, 1-3 parts of catalyst and chelating agent.Before the alumina gel
Drive any one or more of body in ANN aluminium nitrate nonahydrate, Aluminium chloride hexahydrate, aluminium isopropoxide, aluminium secondary butylate；
The anti-corrosive metal coating have hole-closing structure, the closed pore refers to independent cap holes, and not with the external world
Or remaining hole communicates, the aperture of the closed pore meets normal distribution：
F (x) represents the distributive law in the aperture of closed pore, no unit；X represents the aperture of closed pore, and unit is rice (m)；Join position
Number μ represents the average value in aperture, and range is 0.00003-0.00005, and unit is rice (m)；Scale parameter σ represents pore-size distribution
Amplitude, range are 0.000005-0.00001, no unit.
When having closed pore without through-hole in coating, coating again can not be because of the coating that is present such that of through-hole
Corrosion resistance reduces.So the coating of obturator-type makes the corrosion resistance of coating promote 10-12 times.Simultaneously as in coating
It is in the closed pore of normal distribution with the presence of aperture, and normal distribution means that closed pore aperture meets pore-size distribution ideally,
So that the deformability of coating under tension gets a promotion, that is, ductility and ultimate tensile strength get a promotion, from
And good cooperative transformation ability can be possessed with reinforcing bar.And silicon oxide compound, coefficient of thermal expansion conditioning agent, binder, oxidation
Alumina gel presoma, six kinds of materials of catalyst and chelating agent match in specific proportions, then by absorption, and pyroreaction hydrolyzes, contracting
It is poly-, the physics of the complexity such as interfacial reaction and chemical reaction, to which the obturator-type metal for being in normal distribution could be formed with aperture
Corrosion-inhibiting coating
The presoma of the alumina gel is anti-by two steps for hydrolyzing and polymerizeing under the action of catalyst and chelating agent
It answers, to form large specific surface area, gel of the particle size distribution uniformly containing alumina functional group is attached to metallic surface, this
It has led to coating and has more closed pore.And because controlling drying temperature and time so that internal moisture evaporation compares
Slowly, so the closed pore distribution in last coating meets normal distribution.Ethyl acetoacetate is as chelating agent, Ke Yiyou simultaneously
Effect promotes the formation for making alumina sol gel.Meanwhile the expression activitiy of nano oxidized alumina gel is high, it can be with silica chemical combination
Object, coefficient of thermal expansion conditioning agent, binder reaction form amorphous silicic aluminium, so that coating is with higher in interface
Mechanical strength, can further promote the cohesive force between coating and metal, improve the resistance to corrosion of coating.
Further, electrostatic coating method may be used in the painting method of step 5), and wherein electrostatic potential is 30-90 thousand
Volt, electric current are 20-80 microamperes, and gas output is 5-8 Liter Per Minutes, and spray distance is 20-50 centimetres；
Further, the sintering parameter of step 6) is：It is sintered at 560-600 DEG C, sintering time is 10-20 points
Clock, heating rate are 5-15 DEG C per minute.
Further, the silicon oxide compound is selected from any one of quartz sand, diatomite, quartz, tridymite, cristobalite
Or it is several.The silicon oxide compound is superfines, and powder diameter is 1000-2000 mesh, preferably 1100-1400 mesh.Silica
Compound is the major matrix material of coating, and ultra-fine grain size advantageously forms hole-closing structure, while its surface will be aoxidized
Aluminium aeroge tightly adsorbs, and tridimensional network is formed after reaction and sintering, and reticular structure can significantly improve coating
Consistency and corrosion resistance.
Further, the coefficient of thermal expansion conditioning agent is selected from sodium metasilicate, potassium metasilicate, lithium metasilicate, titanium dioxide,
Zirconium oxide, vanadium oxide, any one or more in scandium oxide.The coefficient of thermal expansion of silicon oxide compound is about 8 in script coating
(×10-6/ DEG C), wherein metasilicate and metal oxide kind increase the CTE (coefficient of thermal expansion) of coating in sintering, avoid applying
Since unbalanced stress leads to swelling cracking when layer heating.Simultaneously because three kinds of collective effect so that coating can cool down
Also ensure integrality in journey, will not cracking.
Further, it states binder and is selected from chromous oxide, chrome green, nickel monoxide, nickel sesquioxide, an oxidation
Any one or more in manganese, manganese dioxide, cobalt black, cobalt sesquioxide.It illustrates when binder is chromated oxide,
High-temperature sintering process, the oxygen element in chromated oxide link composition alumina key, chromium and metal watch with the aluminium element in coating
The oxide layer in face links to form chromium oxygen key.Stronger chemical bond can be formed in coating and metal in this way, it is ensured that coating
With the close adhesive property of metal.
Further, the catalyst in propylene oxide, hydrochloric acid, sulfuric acid, ammonium hydroxide, sodium hydroxide any one or
It is a variety of.
Further, the chelating agent is selected from any one or more of glacial acetic acid, ethyl acetoacetate, acetylacetone,2,4-pentanedione.
Third object of the present invention is to provide a kind of metal product, the metal product includes as previously described any one
A kind of aperture of kind form is in the obturator-type anti-corrosive metal coating of normal distribution.
Fourth object of the present invention is to provide a kind of aperture closing in normal distribution of any type form as previously described
The purposes of pass anti-corrosive metal coating, the metal product, can be applicable to it is civilian build, pipeline, underground pipe gallery, offshore oil production is flat
Platform, salt-soda soil capital construction, the multiple fields such as generation of electricity by new energy.
Compared with prior art, the present invention having following advantageous effect：
1) because present invention adds silicon oxide compound, coefficient of thermal expansion conditioning agent, binder, alumina gel forerunners
Body, catalyst and chelating agent make this coating have obturator-type structure, and only through-hole is not present in closed pore, and pore-size distribution meets just
State is distributed：Parameters in Formula meaning：F (x) represents the distributive law in the aperture of closed pore, no unit；x
The aperture of closed pore is represented, unit is rice (m)；Location parameter μ represents the average value in aperture, and range is 0.00003-0.00005, single
Position is rice (m)；Scale parameter σ represents the amplitude of pore-size distribution, and range is 0.000005-0.00001, no unit.That is closed pore hole
The distribution Normal Distribution of diameter.Because of the particularity of material and coating structure, the coating ductility of the present invention is high, reinforcing bar
It is a kind of ductile material, building bar is strained in working condition up to 1500-2000 microstrains.The coating limit of the present invention
Stretching strain reaches 1000-2200 microstrains.Therefore, collaboration stretching can occur in company with building iron for this coating, have high
Ductility.2) coating corrosion resistance of the invention can be good.The coating of the present invention can improve reinforcing bar in the immersion environment of simulated seawater
Corrosion resistance up to 10 times or more.
Description of the drawings
Fig. 1 is the local electron microscopic picture of embodiment 1 (scale is 250 μm).
Specific implementation mode
Following embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it should also be understood that, reading
After the content of the invention lectured, those skilled in the art can make various modifications or changes to the present invention, these shapes of equal value
Formula equally falls within the appended claims limited range of the present invention.
Embodiment 1：
1) it grinds for the first time：62 parts of silicon oxide compound, 26 parts of coefficient of thermal expansion conditioning agent, 6 parts of binder are pulverized
End；
2) batch mixing is prepared：3 parts of alumina gel presoma, 2 parts of catalyst, 1 part of chelating agent and water is added in above-mentioned raw materials
Mixing obtains batch mixing；
3) dry：The batch mixing drying that step 2) is obtained；
4) it grinds for second：The batch mixing that step 3) is obtained is regrind into powder；
5) it coats：The powder coating that step 4) is obtained on parent metal,
6) it is sintered：The parent metal high temperature sintering coated with powder that step 5) is obtained, it is in normal state to obtain a kind of aperture
The obturator-type anti-corrosive metal coating of distribution and with a kind of aperture in normal distribution obturator-type anti-corrosive metal coating made of metal
Product.
Further, electrostatic coating method may be used in the painting method of step 5), and wherein electrostatic potential is 60 kilovolts, electricity
Stream is 50 microamperes, and gas output is 6.5 Liter Per Minutes, and spray distance is 35 centimetres；
Further, the sintering parameter of step 6) is：It is sintered at 580 DEG C, sintering time is 20 minutes, heating speed
Rate is 10 DEG C per minute.
The specific steps of embodiment 1-3 and comparative example 1-3 such as embodiment 1, specific match (weight ratio) is referring to table 1
The specific composition proportion (weight ratio) of table 1 embodiment 1-3 and comparative example 1-3 and manufacture craft parameter setting
Closed pore pore size in coating is counted by SEM scanning electron microscope, closed pore aperture can be obtained using Mathematical Fitting
Distribution situation, to obtain the location parameter and scale parameter of normal distribution.
As shown in Table 1, only meet silicon oxide compound, coefficient of thermal expansion conditioning agent, binder, alumina gel forerunner
The ingredient of body, catalyst and chelating agent meets specific proportioning, and in conjunction with corresponding preparation process, the aperture of the present invention could be made
In the obturator-type anti-corrosive metal coating of normal distribution.
In order to verify the present invention for the coating of steel bar anti-corrosion and the effect of painting method, tested：
1) wearability is tested
According to the coating process of embodiment 1 and comparative example 1, coating of the present invention, Mei Geshi are made on the steel plate respectively
2 repeat samples of group are tested, in total 4 samples.The wearability of the knockout washout test method testing coating of reference ASTM D968-93,
The use of sand is Chinese iso standard sand.After coating surface washes away the region of an a diameter of 2mm, stop knockout, and record institute
The knockout volume of consumption.Knockout volume is bigger, and the wearability of coating is better.
2 wearability experimental data of table
As shown in Table 2：Knockout volume numerically from the point of view of, the knockout bulk averaged value of the coating of embodiment 1 is 12.8L,
And the knockout bulk averaged value of comparative example 1 is 3.85L.The wearability of 1 coating of embodiment is much better than comparative example 1.
2) the corrosion-resistant experiment of reinforcing bar
The coated reinforcement and one group of uncoated reinforcing bar of 1,2,3 six groups of Example 1-3 and comparative example respectively amounts to
It is 21 to test reinforcing bar number.It places it in 3.5% sodium chloride solution, accelerated corrosion experiment is carried out after energization.
3 reinforcing bar accelerated corrosion data of table
It can be obtained from table 3, it is the 9-11 of uncoated reinforcing bar that the coated reinforcement of embodiment 1,2,3, which is kept for the time not being corroded,
Times, it is 5 times of uncoated reinforcing bar, only embodiment 1 that the coated reinforcement of comparative example 1,2,3, which is kept for the time not being corroded,
2,3 half.
3) the corrosion-resistant experiment of steel plate
The coated reinforcement and one group of uncoated steel plate of 1,2,3 six groups of Example 1-3 and comparative example respectively amounts to
It is 21 to test steel plate number.It places it in 3.5% sodium chloride solution, accelerated corrosion experiment is carried out after energization.
4 steel plate accelerated corrosion tests of table
It can be obtained from table 4, it is the 9-12 of uncoated steel plate that the coated steel sheet of embodiment 1,2,3, which is kept for the time not being corroded,
Times, it is 5 times of uncoated steel plate, only embodiment 1 that the coated steel sheet of comparative example 1,2,3, which is kept for the time not being corroded,
2,3 half.
4) stretching experiment
The coated reinforcement of 1,2,3 six groups of Example 1-3 and comparative example respectively, every group of 3 repeat samples, every painting
3 resistance strain gages are sticked on layer reinforcing bar.Reinforcing bar is placed on tensile testing machine when starting experiment, and measuring strain is with loads change feelings
Condition, resistance strain gage connect the strain variation on strain-ga(u)ge measurement coated reinforcement.
5 tension test data of table
According to 5 experimental result of above-mentioned table, embodiment 1,2, mean strain value when 3 coated reinforcement cracks with steel bar stretching
Ranging from 1800-2000 microstrains then illustrate that this three groups coated reinforcement can occur collaboration in company with building iron and stretch.Comparison
The mean strain value ranging from 700-1000 microstrains of the coated reinforcement of embodiment 1,2,3, then illustrate comparative example 1,2,3
Coated reinforcement cannot occur collaboration in company with building iron and stretch.Illustrate that closed pore aperture has the embodiment 1-3's of normal distribution
Ductility is greatly better than closed pore aperture not in the comparative example 1,2,3 of normal distribution.
5) coatings cross-section electron microscope
Fig. 1 be comparative example 1 electron microscopic picture, it is similar with embodiment 2,3, thus using 1 as representative.It can be with from figure
Find out, for coating with rebar surface there are one layer of transition zone, this transition zone is merged reinforcing bar with inorganic coating, enhances painting
Cementitiousness between layer and reinforcing bar.And it was found that the hole in coating is all closed pore, by numerical computations, show that closed pore is distributed
Meet normal distribution, that is, meetsAnd location parameter μ is 0.000046 (m)；Scale parameter σ is
0.000007, it can effectively improve the ductility of coating.
Claims (10)
1. a kind of aperture is in the obturator-type anti-corrosive metal coating of normal distribution, it is characterised in that：
The composition of the coating includes by weight：55-70 parts of silicon oxide compound, 20-35 parts of coefficient of thermal expansion conditioning agent bond
1-2 parts of 3-9 parts of agent, 3-9 parts of alumina gel presoma, 1-3 parts of catalyst and chelating agent.The alumina gel presoma
Any one or more in ANN aluminium nitrate nonahydrate, Aluminium chloride hexahydrate, aluminium isopropoxide, aluminium secondary butylate；
The anti-corrosive metal coating has closed pore, does not include through-hole, the aperture of the closed pore meets normal distribution：
F (x) represents the distributive law in the aperture of closed pore, no unit；X represents the aperture of closed pore, and unit is rice (m)；
Location parameter μ represents the average value in aperture, and range is 0.00003-0.00005, and unit is rice (m)；
Scale parameter σ represents the amplitude of pore-size distribution, and range is 0.000005-0.00001, no unit.
2. a kind of aperture according to claim 1 is in the obturator-type anti-corrosive metal coating of normal distribution, which is characterized in that institute
State any one or more of silicon oxide compound selected from quartz sand, diatomite, quartz, tridymite, cristobalite.
3. a kind of aperture according to claim 2 is in the obturator-type anti-corrosive metal coating of normal distribution, which is characterized in that institute
It is superfines to state silicon oxide compound, and powder diameter is 1000-2000 mesh, preferably 1100-1400 mesh.
4. a kind of aperture according to claim 1 is in the obturator-type anti-corrosive metal coating of normal distribution, which is characterized in that institute
It states coefficient of thermal expansion conditioning agent and is selected from sodium metasilicate, potassium metasilicate, lithium metasilicate, titanium dioxide, zirconium oxide, vanadium oxide, oxidation
Any one or more in scandium.
5. a kind of aperture according to claim 1 is in the obturator-type anti-corrosive metal coating of normal distribution, which is characterized in that institute
State binder be selected from chromous oxide, chrome green, nickel monoxide, nickel sesquioxide, manganese monoxide, manganese dioxide, one oxidation
Any one or more in cobalt, cobalt sesquioxide.
6. a kind of aperture according to claim 1 is in the obturator-type anti-corrosive metal coating of normal distribution, which is characterized in that institute
State any one or more of chelating agent selected from glacial acetic acid, ethyl acetoacetate, acetylacetone,2,4-pentanedione.
7. a kind of aperture according to claim 1-6 is in the obturator-type anti-corrosive metal coating of normal distribution, which is characterized in that
When the coating is used for steel bar anti-corrosion, the ultimate tensile strength of coating can reach 1000-2200 microstrains, and can significantly carry
The corrosion resistance of high metal reaches 10-12 times.
8. the preparation method of a kind of anti-corrosive metal coating and the metal product with anti-corrosive metal coating, which is characterized in that including
Following steps：
1) it grinds for the first time：By 3-9 parts of 55-70 parts of silicon oxide compound, 20-35 parts of coefficient of thermal expansion conditioning agent, binder grindings
At powder；
2) batch mixing is prepared：By above-mentioned raw materials be added 3-9 parts of alumina gel presoma, 1-3 parts of catalyst, 1-2 parts of chelating agent and
Water is mixed to obtain batch mixing；The alumina gel presoma is selected from ANN aluminium nitrate nonahydrate, Aluminium chloride hexahydrate, isopropanol
Any one or more in aluminium, aluminium secondary butylate；
3) dry：The batch mixing drying that step 2) is obtained；
4) it grinds for second：The batch mixing that step 3) is obtained is regrind into powder；
5) it coats：Step 4) is obtained into powder coating on parent metal；
6) it is sintered：The parent metal high temperature sintering coated with powder that step 5) is obtained, it is in normal distribution to obtain a kind of aperture
Obturator-type anti-corrosive metal coating and with a kind of aperture in normal distribution obturator-type anti-corrosive metal coating metal product；
The coating has hole-closing structure, and the closed pore refers to independent cap holes, and not with extraneous or remaining hole phase
Logical, the aperture of the closed pore meets normal distribution：
F (x) represents the distributive law in the aperture of closed pore, no unit；X represents the aperture of closed pore, and unit is rice (m)；
Location parameter μ represents the average value in aperture, and range is 0.00003-0.00005, and unit is rice (m)；
Scale parameter σ represents the amplitude of pore-size distribution, and range is 0.000005-0.00001, no unit.
9. a kind of metal product, which is characterized in that the metal product is in comprising claim 1-8 any one of them aperture
The obturator-type anti-corrosive metal coating of normal distribution.
10. a kind of aperture described in claim 1-8 is in described in the obturator-type anti-corrosive metal coating of normal distribution, claim 18
Metal product built civilian, pipeline, underground pipe gallery, offshore oil production platform, salt-soda soil capital construction, the multiple fields such as generation of electricity by new energy
Purposes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810451919.0A CN108395742B (en) | 2018-05-12 | 2018-05-12 | Closed-pore metal anticorrosive coating with normally distributed pore diameters, and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810451919.0A CN108395742B (en) | 2018-05-12 | 2018-05-12 | Closed-pore metal anticorrosive coating with normally distributed pore diameters, and preparation method and application thereof |
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| Publication Number | Publication Date |
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| CN108395742A true CN108395742A (en) | 2018-08-14 |
| CN108395742B CN108395742B (en) | 2020-08-11 |
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| WO2024088057A1 (en) * | 2022-10-26 | 2024-05-02 | 鞍钢集团北京研究院有限公司 | Vanadium oxide and rare earth double-doped ferrite magnetic composite film slurry preparation process and coating method |
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