CN107663636A - Sacrificial anode and preparation method thereof built in a kind of reinforcement in concrete anticorrosion use - Google Patents
Sacrificial anode and preparation method thereof built in a kind of reinforcement in concrete anticorrosion use Download PDFInfo
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- CN107663636A CN107663636A CN201610595984.1A CN201610595984A CN107663636A CN 107663636 A CN107663636 A CN 107663636A CN 201610595984 A CN201610595984 A CN 201610595984A CN 107663636 A CN107663636 A CN 107663636A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/16—Electrodes characterised by the combination of the structure and the material
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F2201/00—Type of materials to be protected by cathodic protection
- C23F2201/02—Concrete, e.g. reinforced
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The present invention relates to sacrificial anode and preparation method thereof built in a kind of reinforcement in concrete anticorrosion use, the sacrificial anode is made up of the kirsite block, magnesium alloy ball and plain conductor of parcel mortar, one end casting magnesium alloy ball of described plain conductor, the kirsite block of other end connection parcel mortar.Compared with prior art, the present invention quickly realizes the polarization to rebar surface, protects armored concrete, is a kind of innovative repairing and protection technique.
Description
Technical field
The present invention relates to antiseptic concrete field, more particularly, to a kind of built-in sacrifice sun of reinforcement in concrete anticorrosion
Pole and preparation method thereof.
Background technology
The whole world is made a general survey of, has significant component of budget to be used for the concrete structure recovery project that steel bar corrosion causes destruction.
Corrosion is the big problem that people face, and the reinforcing bar of 40% production will be used for the replacing of Corrosion Reinforcement.It is estimated that global industry
Degree highest country is used for the expense of corrosion of metal every year, per capita probably in 2000-3000 U.S. dollars.
According to the research of U.S. NACE, Britain and Japan to corrosion cost, the directly or indirectly cost of corrosion accounts for state's people's livelihood
Produce the 3-4% of total value, including concrete structure.2002, NACE corrosion cost reports in the U.S. pointed out that the U.S. spends 1 to 30 hundred million
U.S. dollar is used for recovering concrete structure recovery caused by reinforcement corrosion.
China starts armored concrete being used for industrial construction in the 1950s, and large-scale basis construction starts from 20
The infrastructure such as the later stage eighties in century, sea port dock, highway, viaduct, high buildings and large mansions are built on a large scale, reinforced concrete
Soil structure construction volume is growing day by day, and China is in the peak period for building armored concrete.Many concrete structures have been on active service 10
~30 years, these concrete structures were in the optimal maintenance age.Now beginning to focus on the maintenance of concrete structure can keep away
Exempt from many problems, maintenance cost is low.
Meanwhile for being existed because of reinforcement corrosion by the recovery technique of the concrete structure destroyed, many concrete structures
Severe exacerbation just occurs after the completion of repairing in a few years, to the concrete of chloride ion contamination, we generally cut contaminated area,
Then in repairing one layer of cement-based material of region overlay.But just new-old concrete circle after repairing in a few years after repairing
Nearby severe exacerbation occurs for face.Because the chemical property of new-old concrete is mismatched so as to cause old coagulation around repairing area
The corrosion and destruction of soil, the concrete speed of worsening after often repairing is accelerated, formed so-called " anode ring ", or " halo is imitated
Should ".
In many armored concrete anti-corrosion methods studied in the prior art, electrochemical protection method can inherently solve by
Steel bars corrosion problem caused by electrochemical corrosion.In several measures of several electrochemical protections, impressed current method, traditional sacrificial sun
Many problems be present in protection reinforcement in concrete in pole method, electrochemical dechlorination, electrochemical realkalization.
Chinese patent CN201292406Y discloses Imbed-in sacrificial zinc alloy anode, including sacrificial zinc alloy anode, zinc
The cylindrical anode body of alloy sacrificial anode is cast in cylindrical anode bag, the symmetrical steel of sacrificial zinc alloy anode
Core is outside anode bag.Bag slurry disclosed in the patent with the addition of sodium sulphate, and active mode is salt activator, may cause reinforcing bar
Corrosion.Because highly basic can activate kirsite without corrosion reinforcing bar, sulfate etc. also corrosion reinforcing bar while kirsite is activated, and
The single size of kirsite is：Diameter 50mm, thick 8mm, the weight about 115g of kirsite, such as apply and protect engineering in corrosion prevention
Cause the waste of material, protection cost height.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind is quickly realized to steel
The polarization on muscle surface, protect built-in sacrificial anode of armored concrete and preparation method thereof.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of reinforcement in concrete anticorrosion use built in sacrificial anode, by the kirsite block of parcel mortar, magnesium alloy ball with
And plain conductor composition, one end casting magnesium alloy ball of described plain conductor, the kirsite block of other end connection parcel mortar.
Contain the component of following weight percent content in described kirsite block：Al 0.30~0.55, Cd 0.07~
0.09th, impurity element Fe, Cu, Pb≤0.02；Remaining is Zn.
Described kirsite block is also connected by wire with protected reinforcing bar, and the current potential of kirsite is less than protected
Reinforcing bar, it is connected by wire with reinforcing bar, itself loses electronics as anode, and reinforcing bar is protected as negative electrode.
Described kirsite block is cuboid, cylinder or " the column kirsites of more fan leafs " structure.The matter of kirsite
Measure as 40g~200g, specifically, kirsite is shaped as cuboid, cylinder, and weight is 40g~80g, available for coagulation
The corrosion prevention of native reinforcing bar.The column kirsite of more fan leafs, weight are 80~200g, the corrosion control available for concrete.
Described magnesium alloy ball contains the component of following weight percent content：Al 4.0~8.0, Zn 1.0~5.0, Mn
0.1~0.6, impurity element Fe, Cu, Ni, Si ＜ 0.02%, remaining is Mg.A diameter of 5mm~30mm of magnesium alloy ball.
Kirsite can not provide sufficiently large protective current in the early stage because driving current potential does not have the height of magnesium, and protection reinforcing bar needs
Longer activationary time, therefore the polarization reinforcing bar time can be shortened by connecting magnesium alloy.
The preparation method of sacrificial anode built in reinforcement in concrete anticorrosion use, using following steps：
(1) liquid magnesium alloy of melting is cast on uncoated bright plain conductor, one end casting of plain conductor
Magnesium alloy ball is made；
(2) the iron wire other end with magnesium alloy ball is fixed in a mold, the zinc liquid of melting is cast in no painting
The kirsite block of shaping is taken out in the other end of the bright wire of layer, the demoulding；
(3) one end of kirsite block is fixed to the mortar for injecting mobility into mould in a mold, stands 48~72h
After be stripped, obtain built-in sacrificial anode.
Compared with prior art, for the present invention by wrapping up special mortar in zinc alloy surface, strong basicity is lasting
Activate kirsite.Mortar uses the composition of alkaline activity kirsite, the not corrosion reinforcing bar such as chloride and sulfate, by adding
Strengthen alkaloid substance, the pH value for improving mortar is more than 14, and active mode is alkaline activity.After the mortar solidification for wrapping up kirsite, make zinc
Alloy is in more stable environment, and electric current output is more stable；There are many equally distributed said minuscule holes, kirsite inside mortar
The loose product of corrosion easily come off；The invention overcomes conventional sacrificial anode and is only used for the seawater such as ship, harbour moistening ring
Border；Realize and the reinforcing bar in concrete is protected；Bimetallic material structure ensure that built-in sacrificial anode inserts armored concrete
The polarization to rebar surface is quickly realized after structure, protects armored concrete.
The built-in sacrificial anode that the present invention uses is used for anti-corrosion and the reparation of reinforced concrete structure, is a kind of innovative
Repairing and protection technique, have advantages below：
1st, outputting current steadily, service life length (are more than 20 years)；
2nd, impressed current is not needed so as to more energy-conserving and environment-protective；
3rd, it is protected from " overprotection " for armored concrete and produces hydrogen；
4th, produced using without electric spark；
5th, cost is low；
6th, bimetallic material structure overcomes zinc alloy anode length " activation phase ", and sacrificial anode one end carries Mg alloys, real
The now quickly polarization to reinforcing bar, solve kirsite and initially drive the problem of current potential is low, and the polarization time is long；
7th, this structure is easy to the banding fixed of sacrificial anode, the Mg metal ends of small size around exposed reinforcing bar writhing number
Circle, realizes the electrical connection of sacrificial anode and reinforcing bar；
8th, the corrosion expansion rate of zinc is low, expands 0.2-0.3 times；
9th, overbasic loose mortar inclusion enclave absorbs the corrosion expansion of spelter；
10th, high ph-values have corrosivity to zinc, but do not have corrosivity to steel；
11st, design kirsite shape improves surface-to-volume ratio.Compared with other shapes, there is provided same current is strong
When spending, the weight of kirsite used is lower, cost-effective.
Brief description of the drawings
Fig. 1 is the structural representation of built-in sacrificial anode；
Fig. 2 is the structural representation of the column kirsite of more fan leafs.
In figure, 1- kirsites block, 2- magnesium alloys ball, 3- plain conductors.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
Sacrificial anode built in a kind of reinforcement in concrete anticorrosion use, its structure by the zinc of parcel mortar as shown in figure 1, closed
Gold bullion 1, magnesium alloy ball 2 and plain conductor 3 form, one end casting magnesium alloy ball 2 of plain conductor 3, other end connection parcel
The kirsite block 1 of mortar.
Wherein, kirsite block contains the component of following weight percent content：Al:0.40~0.50；Cd：0.07~
Impurity element≤0.02 such as 0.09Fe, Cu, Pb；Remaining is Zn).Kirsite block is also connected by wire with protected reinforcing bar
Connect, the current potential of kirsite is less than protected reinforcing bar, is connected by wire with reinforcing bar, itself loses electronics, steel as anode
Muscle is protected as negative electrode.Magnesium alloy ball contains the component of following weight percent content：Al:5.0~7.0；Zn：2.0~
4.0；Mn：0.1~0.6；Fe, Cu, Ni, Si and other impurities element ＜ 0.02%, remaining as Mg).Kirsite is because driving current potential
There is no the height of magnesium, sufficiently large protective current can not be provided in the early stage, protection reinforcing bar needs longer activationary time, therefore can pass through
Connect magnesium alloy and shorten the polarization reinforcing bar time.
The preparation method of sacrificial anode built in reinforcement in concrete anticorrosion use, using following steps：
(1) liquid magnesium alloy of melting is cast on uncoated bright plain conductor, one end casting of plain conductor
Magnesium alloy ball is made；
(2) the iron wire other end with magnesium alloy ball is fixed in a mold, the zinc liquid of melting is cast in no painting
The kirsite block of shaping is taken out in the other end of the bright wire of layer, the demoulding.
(3) one end of kirsite block is fixed to the mortar for injecting mobility into mould in a mold, stands 48~72h
After be stripped, obtain built-in sacrificial anode.
By changing the form parameter of kirsite, change the surface area and weight of kirsite, so as to realize in concrete
Reinforcing bar carry out difference in functionality protection.Below to the pass between the service life of built-in sacrificial anode, weight alloy and electric current
System makees quantitative calculating.
Sacrificial anode life-span, quality, current relationship：
The consumption rate of sacrificial anode calculates：
Sacrificial anode K refers to unit quantity of electricity, the weight of the sacrificial anode material of annual actual consumption.
K=8760/e ч [kg/ (Aa)] (1)
E--- sacrificial anodes theory electrical equivalent (Ah/kg) in formula；
The current efficiency (%) of ч --- sacrificial anode
8760---1 hourage
The magnitude of current that sacrificial anode is sent calculates：Send magnitude of current IρMean the magnitude of current that sacrificial anode is sent, its value with
Use environment is relevant with surface configuration.Calculation formula is as follows：
IgI36=0.727lgA+lgU-1.188 (2)
Iρ=I36*36/ρ (3)
Surface area (the m that A--- sacrificial anodes expose in formula2)
Potential difference (V) between U--- sacrificial anodes and protected object (negative electrode)
ρ --- concrete ratio resistance (Ω cm)
I36--- the magnitude of current (A) that ratio resistance is sent when being 36 Ω cm (the average ratio resistance of seawater).
Iρ ----ratio resistance isThe magnitude of current (A) sent during ρ Ω cm
The current potential of sacrificial zinc alloy anode：-1050mv；Sacrificial magnesium alloy anode current potential -1500mV.Reinforcement in concrete table
The current potential of face passivation is -100mV；It is -350~-500mV when surface active, it is seen then that the electrode potential of sacrificial anode is than iron
Electrode potential is much lower.During using zinc as sacrificial anode material, potential difference between sacrificial anode and protected object for 550~
950mV。
ρ：The ratio resistance of concrete, there is relation with concrete material in itself and construction, ambient humidity, temperature.Coagulation
The ratio resistance of soil or patching material is bigger, and (maximum is no more than 15000 Ω cm, in order to reach optimum performance, it is desirable to which what is used repaiies
The resistivity for mending material or concrete mortar is less than 15000 Ω cm), built-in sacrificial anode generation current amount I ρ are smaller, corrosion
Speed is smaller.Conversely, the ratio resistance of concrete or patching material it is smaller (concrete under wet environment, resistivity ratio is relatively low,
It is 1000 Ω cm to take concrete resistivity now), built-in sacrificial anode generation current amount I ρ are bigger, and corrosion rate is bigger.
Suitable form parameter is chosen as shown in Figure 2 obtains the surface area of kirsite block：S=9536mm2=9536*10- 6m2, volume 25.166cm3.The bigger potential difference of sacrificial anode and reinforcing bar, concrete or repairing are understood by formula (2) and formula (3)
The resistivity of material is smaller, and the electric current that sacrificial anode is sent is bigger, and corrosion is faster.Power taking potential difference higher value 950mV, concrete compared with
During 1000 Ω cm of small resistor rate, obtained electric current is maximum, and corrosion is most fast.By U=0.95V, the Ω cm of ρ=1000 substitute into formula
(2) with being obtained in formula (3), I36(magnitude of current)=0.0021A=2.1mA；I ρ (magnitude of current)=I36* 36/ ρ=0.0756mA, I ρ
(current strength)=I ρ (magnitude of current)/SSurface area=7.9mA/m2。
By theoretical electrical equivalent=820 of kirsite, current efficiency ч of the kirsite in high-alkali mortar is more than 90%, by formula
(1) minimum current efficiency is taken to obtain maximum sacrificial anode wear rate K=11.84kg/ (Aa), the electricity that (3) and (4) are obtained
Intensity of flow, which is multiplied by sacrificial anode surface area and obtains electric current I, K*I that sacrificial anode sends, draws the weight of annual sacrificial anode consumption
Amount.
GConsume max=K*I=11.84*0.0756g=0.895 (g), calculate and learn that the weight of annual sacrificial anode consumption is small
In the 5% of sacrificial anode weight, surface area is used to be slightly reduced with sacrificial anode, the magnitude of current is slightly lower caused by sacrificial anode
Initial value, depletion rate have slowed down.
Take the upper limit G of year consumption rateConsume max0.895g, the weight G=V ρ of sacrificial anodeKirsite=184g.Product uses 20
Expendable weight after year is less than 17.9g, less than the 10% of spelter weight.It ensure that product can use 20+, for different use
The deisgn product on way, by changing spelter shape and properly increasing spelter quality the protection time limit of sacrificial anode can be ensured 20
~50 years.
Embodiment 2
For the repairing of concrete, prevent " anode ring "
The liquid magnesium alloy of melting is cast on uncoated bright wire, diameter is made in one end casting of wire
7.5mm Mg alloying pellets.
The above-mentioned iron wire other end fixation being made with Mg alloying pellets in a mold, the zinc liquid of melting is cast in
The kirsite of shaping is taken out in the other end of uncoated bright wire, the demoulding.Iron wire one end now is Mg alloying pellets, separately
One end is Zn alloy samples.
The mortar for injecting mobility into mould in a mold is fixed in the sample that upper step is obtained, one end of kirsite,
It is stripped after standing 48~72h, obtains built-in sacrificial anode.
Cut concrete around and under region Corrosion Reinforcement to be repaired.Remove exposure reinforcing bar iron rust and concrete residue.
Anode and patching material are placed immediately after reinforcing bar cleaning treatment.
Embodiment 2
Built-in sacrificial anode is used for bridge widening
The liquid magnesium alloy of melting is cast on uncoated bright wire, diameter is made in one end casting of wire
7.5mm Mg alloying pellets.
The above-mentioned iron wire other end fixation being made with Mg alloying pellets in a mold, the zinc liquid of melting is cast in
The kirsite of shaping is taken out in the other end of uncoated bright wire, the demoulding.Iron wire one end now is Mg alloying pellets, separately
One end is Zn alloy samples.
The mortar for injecting mobility into mould in a mold is fixed in the sample that upper step is obtained, one end of kirsite,
It is stripped after standing 48~72h, obtains built-in sacrificial anode.
When bridge carries out widening work, sacrificial anode colligation is in reinforcing bar in new and old rebar junction annex, anode block
Below.Can be with one sacrificial anode of a reinforcing bar colligation, or at interval of a reinforcement installation one according to the distribution density of reinforcing bar
Individual sacrificial anode.For preventing steel bar corrosion caused by the contact of bridge widening xenogenesis reinforcing bar.
Embodiment 3
Reparation for bent cap
The liquid magnesium alloy of melting is cast on uncoated bright wire, diameter is made in one end casting of wire
7.5mm Mg alloying pellets.
The above-mentioned iron wire other end fixation being made with Mg alloying pellets in a mold, the zinc liquid of melting is cast in
The kirsite of shaping is taken out in the other end of uncoated bright wire, the demoulding.Iron wire one end now is Mg alloying pellets, separately
One end is Zn alloy samples.
The mortar for injecting mobility into mould in a mold is fixed in the sample that upper step is obtained, one end of kirsite,
It is stripped after standing 48~72h, obtains built-in sacrificial anode.
The crossbeam of armored concrete is set on abutment or campshed.Bent cap is support, distribution and the load for transmitting superstructure
Lotus.Structural perimeter is with the humid air, and steel bar corrosion often easily occurs, and is often easier that armored concrete mistake occurs as load part
Effect.The artificial concrete for abolishing corrosion pollution and the concrete loosened.Expose reinforcing bar, after cleaning reinforcing bar, kidnap sacrificial anode
Repaired afterwards with patching material.Prevent the corrosion of bent cap reinforcing bar.
Embodiment 4
Corrosion prevention for reinforced concrete structure
The liquid magnesium alloy of melting is cast on uncoated bright wire, and diameter is made in one end casting of wire
7.5mm Mg alloying pellets.
The above-mentioned iron wire other end fixation being made with Mg alloying pellets in a mold, the zinc liquid of melting is cast in
The kirsite of shaping is taken out in the other end of uncoated bright wire, the demoulding.Iron wire one end now is Mg alloying pellets, separately
One end is Zn alloy samples.
The mortar for injecting mobility into mould in a mold is fixed in the sample that upper step is obtained, one end of kirsite,
It is stripped after standing 48~72h, obtains built-in sacrificial anode.
Kirsite is shaped as cuboid or cylinder, and weight is 40g~80g.Built-in sacrificial anode can be used for newly-built
The prevention of concrete structure reinforcing bars corrosion.When such as newly building bridge, tunnel concrete structure, sacrificial anode is used built in installation in advance
In the corrosion prevention of concrete structure.
Embodiment 5
The control of slight erosion occurs for reinforced concrete structure.
The liquid magnesium alloy of melting is cast on uncoated bright wire, and diameter is made in one end casting of wire
7.5mm Mg alloying pellets.
The above-mentioned iron wire other end fixation being made with Mg alloying pellets in a mold, the zinc liquid of melting is cast in
The kirsite of shaping is taken out in the other end of uncoated bright wire, the demoulding.Iron wire one end now is Mg alloying pellets, separately
One end is Zn alloy samples.
The mortar for injecting mobility into mould in a mold is fixed in the sample that upper step is obtained, one end of kirsite,
It is stripped after standing 48~72h, obtains final products.
Such as the column kirsite of the more fan leafs of Fig. 2, weight 80g, controlled available for concrete erosion.
Embodiment 6
The control of heavy corrosion occurs for reinforced concrete structure
Change the form parameter of kirsite, controlled available for the armored concrete for having sent out corrosion.
The liquid magnesium alloy of melting is cast on uncoated bright wire, and diameter is made in one end casting of wire
10mm Mg alloying pellets.
The above-mentioned iron wire other end fixation being made with Mg alloying pellets in a mold, the zinc liquid of melting is cast in
The kirsite of shaping is taken out in the other end of uncoated bright wire, the demoulding.Iron wire one end now is Mg alloying pellets, separately
One end is Zn alloy samples.
The mortar for injecting mobility into mould in a mold is fixed in the sample that upper step is obtained, one end of kirsite,
It is stripped after standing 48~72h, obtains final products.
Such as the column kirsite of the more fan leafs of Fig. 2, parameters of the designed shape, kirsite weight is 120g, to becoming rusty
The armored concrete of erosion is protected.
Claims (8)
1. sacrificial anode built in a kind of reinforcement in concrete anticorrosion use, it is characterised in that the sacrificial anode is by parcel mortar
Kirsite block, magnesium alloy ball and plain conductor composition, one end casting magnesium alloy ball of described plain conductor, other end connection
Wrap up the kirsite block of mortar.
2. sacrificial anode built in a kind of reinforcement in concrete anticorrosion use according to claim 1, it is characterised in that described
Kirsite block in contain following weight percent content component：Al 0.30~0.55, Cd0.07~0.09, impurity element
For Fe, Cu, Pb≤0.02；Remaining is Zn.
3. sacrificial anode built in a kind of reinforcement in concrete anticorrosion use according to claim 1, it is characterised in that described
Kirsite block be cuboid, cylinder, trapezoidal or more flabellum sheets section body structure.
4. sacrificial anode built in a kind of reinforcement in concrete anticorrosion use according to claim 1, it is characterised in that described
The quality of kirsite block be 40g~200g.
5. sacrificial anode built in a kind of reinforcement in concrete anticorrosion use according to claim 1, it is characterised in that described
Kirsite block be also connected by wire with protected reinforcing bar.
6. sacrificial anode built in a kind of reinforcement in concrete anticorrosion use according to claim 1, it is characterised in that described
Magnesium alloy ball contain the component of following weight percent content：It is Al 4.0~8.0, Zn 1.0~5.0, Mn 0.1~0.6, miscellaneous
Prime element is Fe, Cu, Ni, Si ＜ 0.02%, and remaining is Mg.
7. sacrificial anode built in a kind of reinforcement in concrete anticorrosion use according to claim 1, it is characterised in that described
Magnesium alloy ball a diameter of 5mm~30mm.
8. the preparation method of sacrificial anode built in reinforcement in concrete anticorrosion use as claimed in claim 1, it is characterised in that
This method uses following steps：
(1) liquid magnesium alloy of melting is cast on uncoated bright plain conductor, one end casting of plain conductor is made
Magnesium alloy ball；
(2) the iron wire other end with magnesium alloy ball is fixed in a mold, the zinc liquid of melting be cast in uncoated
The kirsite block of shaping is taken out in the other end of bright wire, the demoulding；
(3) one end of kirsite block is fixed to the mortar for injecting mobility into mould in a mold, taken off after standing 48~72h
Mould, obtain built-in sacrificial anode.
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| CN201610595984.1A CN107663636A (en) | 2016-07-27 | 2016-07-27 | Sacrificial anode and preparation method thereof built in a kind of reinforcement in concrete anticorrosion use |
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| CN201610595984.1A CN107663636A (en) | 2016-07-27 | 2016-07-27 | Sacrificial anode and preparation method thereof built in a kind of reinforcement in concrete anticorrosion use |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110964947A (en) * | 2019-12-02 | 2020-04-07 | 兰州理工大学 | Zinc alloy sacrificial anode material for reinforced concrete structure in chloride corrosion environment |
| WO2023040239A1 (en) * | 2021-09-15 | 2023-03-23 | 厦门大学 | Zinc-magnesium alloy intelligent sacrificial anode material and use thereof |
| CN116265609A (en) * | 2021-12-16 | 2023-06-20 | 中国石油天然气股份有限公司 | Zinc alloy sacrificial anode material and preparation method, application and method for preparing anticorrosive coating thereof |
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| US6022469A (en) * | 1993-06-16 | 2000-02-08 | Aston Material Services Limited | Repair of corroded reinforcement in concrete using sacrificial anodes |
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| CN116265609A (en) * | 2021-12-16 | 2023-06-20 | 中国石油天然气股份有限公司 | Zinc alloy sacrificial anode material and preparation method, application and method for preparing anticorrosive coating thereof |
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