CN109797394A - Anti-corrosion polyaniline/iron composite coating of a kind of Mg alloy surface conduction and preparation method thereof - Google Patents
Anti-corrosion polyaniline/iron composite coating of a kind of Mg alloy surface conduction and preparation method thereof Download PDFInfo
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Abstract
本发明提出了一种镁合金表面导电耐蚀聚苯胺/铁复合涂层及其制备方法，首先采用喷砂处理在镁合金表面形成均匀致密的改性层，该改性层具有一定的粗糙度，有利于提高复合涂层与镁合金基体的结合强度；然后利用旋涂法制备厚度不同、内部缺陷少的聚苯胺/铁复合涂层。聚苯胺粉末与铁粉均匀混合在成膜介质中，聚苯胺粉末可提供优异的耐腐蚀性能和良好的导电性，铁粉可调控镁合金的腐蚀速率，弥补聚苯胺粉末耐磨性差的缺点，两种组元的协同效应可在不破坏镁合金表面导电性的基础上，提高其耐腐蚀性能。本发明所述方法制备的表面具有聚苯胺/铁复合涂层的镁合金可用于对导电性和耐蚀性要求较高的使用环境。
The invention provides a conductive and corrosion-resistant polyaniline/iron composite coating on the surface of magnesium alloy and a preparation method thereof. First, a uniform and dense modified layer is formed on the surface of the magnesium alloy by sandblasting, and the modified layer has a certain roughness. , which is beneficial to improve the bonding strength of the composite coating and the magnesium alloy substrate; and then use the spin coating method to prepare the polyaniline/iron composite coating with different thicknesses and less internal defects. Polyaniline powder and iron powder are uniformly mixed in the film-forming medium. Polyaniline powder can provide excellent corrosion resistance and good electrical conductivity. Iron powder can regulate the corrosion rate of magnesium alloys and make up for the disadvantage of poor wear resistance of polyaniline powder. The synergistic effect of the two components can improve the corrosion resistance of magnesium alloys without destroying the surface conductivity. The magnesium alloy with the polyaniline/iron composite coating on the surface prepared by the method of the present invention can be used in a use environment that requires high electrical conductivity and corrosion resistance.
Description
Technical field
The invention belongs to metal surface properties modification fields, and in particular to the preparation side of Mg alloy surface functional coating
Method.
Background technique
Magnesium alloy has the advantages that density is small, specific strength is high, damping property is good, Cutting free processing, is convenient for recycling, in automobile system
Make, the fields such as aerospace, electronic communication, bio-medical have broad prospect of application, be known as " 21 century green metal structure
Material ".But magnesium alloy chemical property is very active, and degradation occurs easily in corrosive medium and loses structural intergrity, leads
It is caused to fail due to mechanical support acts on and declining during military service.Therefore, it is necessary to which it is modified to mention to carry out surface to magnesium alloy
Its high corrosion resistance.
Metal coating, organic polymer coating and inorganic non-gold can be divided into according to type difference by studying more coating at present
Belong to coating, wherein metal coating has the characteristics that intensity is high, wear-resistant, conductive；Organic polymer coating, which has, to be obstructed, is resistance to
The characteristics of burn into softness, lubrication；Inorganic and Nonmetallic Coating has the characteristics that hardness is big, intensity is high, stability is good.Practical application
In, single type coating is often difficult to adapt to the complicated and diversified Service Environment of magnesium alloy, is imitated using the collaboration between different coating
It answers, comprehensive performance more preferably composite coating can be prepared, this has become the development trend of Magnesiumalloy surface modifying research.
With the continuous extension of magnesium alloy application field, the requirement to its function of surface characteristic is higher and higher, at this stage magnesium
Alloy surface composite coating is electrical isolation mostly, they reduce magnesium alloy while improving corrosion resistance of magnesium alloy energy
The electrology characteristic on surface.Studies have shown that polyaniline is a kind of novel conductive polymer, lacking for common macromolecule electrical isolation can be made up
Point, and polyaniline has excellent corrosion resistance, can be used for anti-corrosion of metal field, but the wearability of polyaniline is poor,
Military service performance is bad in by friction environment.Iron has corrosion rate compared to magnesium alloy as typical degradable metal
Mg alloy surface mechanical property can be improved in advantage small, mechanical strength is high, wearability is good, regulates and controls Corrosion Behaviors of Magnesium Alloys rate, simultaneously
Make up the shortcomings that polyaniline wears no resistance.Therefore, it by preparing polyaniline/iron composite coating in Mg alloy surface, can protect
On the basis of demonstrate,proving magnesium alloy electric conductivity, the corrosion resistance of Mg alloy surface is improved.
Summary of the invention
The present invention corrosion resistance of magnesium alloy can poor, existing corrosion-inhibiting coating be electrically insulated aiming at the problem that, provide a kind of conduction
Anti-corrosion composite coating.The magnesium alloy is commercialization AZ system, ZK system and WE system magnesium alloy plate, and the composite coating is polyphenyl
Amine/iron composite coating.Wherein, polyaniline plays the role of improving corrosion resistance in composite coating, improves electric conductivity；Iron is mixed
Miscellaneous the corrosion rate of controllable magnesium alloy improves the mechanical strength of composite coating in composite coating, makes up polyaniline wearability
The disadvantage of difference.With the modified magnesium alloy in the composite coating surface, conductive anti-corrosion magnesium can be prepared by the synergistic effect of polyaniline and iron
Alloy.
The technical solution of the present invention is as follows:
A kind of conductive anti-corrosion polyaniline/iron composite coating of Mg alloy surface, the magnesium alloy be commercialization AZ system, ZK system and
WE system magnesium alloy plate, the composite coating are polyaniline/iron composite coating.
Even compact is formed in Mg alloy surface using blasting treatment first and there is the modified layer of certain surface roughness,
The surface roughness value (Ra) is 0.4~0.9mm, and it is multiple then to prepare polyaniline/iron in Mg alloy surface using spin-coating method
Close coating.
The modified magnesium alloy corrosion potential in surface be -0.77~-0.65V/SCE, corrosion current density be (0.23~
0.09)×10-6A/cm2, surface is conductive.
Another object of the present invention is to propose a kind of preparation of conductive anti-corrosion polyaniline/iron composite coating of Mg alloy surface
Method includes the following steps:
Step 1: magnesium alloy initial surface mechanically polishes
Magnesium alloy initial surface is pre-processed, is first polished with waterproof abrasive paper, aluminum oxide polishing powder pair is then utilized
Polishing rear surface is mechanically polished, and is finally cleaned by ultrasonic in dehydrated alcohol, and cold wind drying obtains magnesium alloy polished surface.
Step 2: magnesium alloy polished surface blasting treatment
Blasting treatment is carried out to magnesium alloy polished surface, sand-blasting abrasive selects quartz sand, quartz sand D50 median 0.05
~0.80mm；Compressed gas selects high-purity argon gas, 0.05~0.50MPa of argon pressure；Select the straight hole type spray of 8~12mm of diameter
Mouth, nozzle and 250~600mm of Mg alloy surface distance, abrasive material spray angle and 10~40 ° of Mg alloy surface normal angle, obtain
To the magnesium alloy surface to be plated of coarse densification.
Preferably, 0.1~0.5mm of quartz sand D50 median, 0.05~0.25MPa of argon pressure, nozzle and magnesium alloy
300~500mm of surface distance, abrasive material spray angle and 15~25 ° of Mg alloy surface normal angle.
Step 3: polyaniline/iron composite coating preparation
(A) it selects conductive polyaniline powder and 99.9% high purity iron powder is composite coating constituent element, polyaniline powder D50
0.1~10 μm of median, 0.5~15 μm of high-purity iron powder D50 median, polyaniline powder/iron powder mass ratio 1~5, film forming
Media group become 70% mass fraction epoxy resin and 30% mass fraction curing agent, polyaniline/iron mixed-powder and at
Film medium mass ratio 0.01~0.05, magnet rotor stir 10min, the coated solution being uniformly mixed.
Preferably, 0.5~5 μm of polyaniline powder D50 median, 2~12 μm of high-purity iron powder D50 median, polyphenyl
Amine powder/iron powder mass ratio 2~4, polyaniline/iron mixed-powder and filming medium mass ratio 0.02~0.04.
(B) film layer coating is carried out to magnesium alloy surface to be plated using spin coater, magnesium alloy is fixed on spin coater turntable,
Coated solution obtained by third step (A) is added drop-wise to magnesium alloy surface to be plated using liquid-transfering gun, spin coater 500~2000rpm of revolving speed,
5~10min is persistently rotated, magnesium alloy after plated film is finally kept the temperature 24 hours at 80 DEG C, obtains polyaniline/iron composite coating table
The modified magnesium alloy in face；Wherein, every 1cm21~5 μ L of coated solution is added dropwise in Mg alloy surface product.
The epoxy resin is E51 type thermosetting epoxy resin, and the curing agent is W93 curing agent.
The magnesium alloy is by the modified gained in polyaniline/iron composite coating surface.
Preferably, every 1cm2Mg alloy surface product dropwise addition 2~4 μ L of coated solution volume, spin coater revolving speed 800~
1000rpm。
Above-mentioned preparation method can prepare polyaniline/iron composite coating in Mg alloy surface, which is not reducing magnesium
On the basis of alloy surface electric conductivity, hence it is evident that improve its corrosion resistance.Wherein, blasting treatment can be formed in Mg alloy surface
The modified layer of even compact, the modified layer have certain roughness, are conducive to the knot for improving composite coating and magnesium alloy substrate
Close intensity；Spin-coating method can get the composite coating that thickness is different, internal flaw is few by suitably adjusting revolving speed, be a kind of easy to be high
The Magnesiumalloy surface modifying method of effect.By the optimum organization to blasting treatment and spin-coating method technological parameter, can prepare high-quality
Polyaniline/iron composite coating is measured, while improving Mg alloy surface electrology characteristic and corrosion resistance, meets it complicated and diversified
Requirement.
The invention has the benefit that
The present invention has organically combined blasting treatment and spin-coating method, and advantage is as follows:
(1) inventor has obtained blasting treatment and spin-coating method prepares polyaniline/iron composite coating most by a large number of experiments
Excellent technological parameter: for blasting treatment, quartz sand D50 0.1~0.5mm of median, 0.05~0.25MPa of argon pressure, spray
Mouth and 300~500mm of Mg alloy surface distance, abrasive material spray angle and 15~25 ° of Mg alloy surface normal angle；For spin coating
Method, 0.5~5 μm of polyaniline powder D50 median, 2~12 μm of high-purity iron powder D50 median, polyaniline powder/iron powder matter
Measure ratio 2~4, polyaniline/iron mixed-powder and filming medium mass ratio 0.02~0.04,2~4 μ L of coated solution volume, spin coating
800~1000rpm of machine revolving speed.In this process parameters range, it can prepare that even compact, internal flaw are few, bond strength is high
Polyaniline/iron composite coating.
(2) in polyaniline/iron composite coating, polyaniline powder and iron powder are evenly mixed in filming medium, polyaniline powder
End can provide excellent corrosion resistance and good electric conductivity, and the corrosion rate of the controllable magnesium alloy of iron powder makes up polyaniline
The synergistic effect of the shortcomings that powder wears no resistance, two kinds of constituent elements can improve magnesium alloy on the basis of not destroying surface conductivity
Surface corrosion resistance energy.Modified magnesium alloy corrosion potential is -0.77~-0.65V/SCE, and corrosion current density is
(0.23~0.09) × 10-6A/cm2, compared with unmodified magnesium alloy, corrosion potential improves 740~980mV, self-corrosion electricity
Current density reduces 54~208 times.In addition, modified Mg alloy surface resistance value is not apparent from raising, it is conductive.
Detailed description of the invention
Fig. 1: Mg alloy surface polyaniline/iron composite coating microscopic appearance in embodiment 1.
Fig. 2: in embodiment 1 polyaniline/iron composite coating before modified after Corrosion Behaviors of Magnesium Alloys performance comparison.
Fig. 3: polyaniline/iron composite coating rear Mg alloy surface resistance value comparison before modified in embodiment 1.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
This preparation side is embodied in a kind of preparation method of Mg alloy surface polyaniline/iron composite coating in the present invention
Method has the following steps:
Step 1: magnesium alloy initial surface mechanically polishes
Magnesium alloy initial surface is pre-processed, is beaten respectively with 500#, 1000#, 1500# and 2000# waterproof abrasive paper
Mill removes surface scale and impurity, then carries out mechanical throwing to polishing rear surface using the aluminum oxide polishing powder of 0.3 μm of partial size
Light, until removal surface scratch, is finally cleaned by ultrasonic 15min in dehydrated alcohol, cold wind drying obtains magnesium alloy polishing table
Face.
Step 2: magnesium alloy polished surface blasting treatment
Blasting treatment is carried out to magnesium alloy polished surface, sand-blasting abrasive selects quartz sand, quartz sand D50 median 0.05
~0.80mm, preferably 0.1~0.5mm；Compressed gas selection high-purity argon gas, 0.05~0.50MPa of argon pressure, preferably 0.05~
0.25MPa；The straight hole type nozzle of selection 8~12mm of diameter, nozzle and 250~600mm of Mg alloy surface distance, preferably 300~
500mm, abrasive material spray angle and 10~40 ° of Mg alloy surface normal angle, preferably 15~25 °, and the magnesium for obtaining coarse densification closes
Gold surface to be plated.
Step 3: polyaniline/iron composite coating preparation
(A) it selects conductive polyaniline powder and 99.9% high purity iron powder is composite coating constituent element, polyaniline powder D50
0.1~10 μm of median, preferably 0.5~5 μm, 0.5~15 μm of high-purity iron powder D50 median, preferably 2~12 μm, polyphenyl
Amine powder/iron powder mass ratio 1~5, preferably 2~4, filming medium group become the E51 type thermoset epoxy tree of 70% mass fraction
The W93 curing agent of rouge and 30% mass fraction, polyaniline/iron mixed-powder and filming medium mass ratio 0.01~0.05, preferably
0.02~0.04, magnet rotor stirs 10min, the coated solution being uniformly mixed.
(B) film layer coating is carried out to magnesium alloy surface to be plated using spin coater, magnesium alloy is fixed on spin coater turntable,
Coated solution obtained by third step (A) is added drop-wise to magnesium alloy surface to be plated using liquid-transfering gun, spin coater 500~2000rpm of revolving speed,
It is preferred that 800~1000rpm, persistently rotates 10min, magnesium alloy after plated film is finally kept the temperature 24 hours at 80 DEG C, obtains polyphenyl
The modified magnesium alloy in amine/iron composite coating surface；Wherein, every 1cm2Mg alloy surface, which accumulates, is added dropwise 1~5 μ L of coated solution, and preferably 2
~4 μ L.
Analysis on Microstructure is carried out to Mg alloy surface polyaniline/iron composite coating of the method for the invention preparation, it can
Know that the composite coating is made of polyaniline of the Dispersed precipitate in filming medium and iron mixed-powder, thickness is uniform, internal flaw
It is few, it is well combined with magnesium alloy substrate.
It describes in detail below by specific embodiment.
Embodiment 1:
Step 1: magnesium alloy initial surface mechanically polishes
AZ31 magnesium alloy initial surface is pre-processed, respectively with 500#, 1000#, 1500# and 2000# waterproof abrasive paper into
Row polishing, removes surface scale and impurity, then carries out machine to polishing rear surface using the aluminum oxide polishing powder of 0.3 μm of partial size
Tool polishing, until removal surface scratch, is finally cleaned by ultrasonic 15min in dehydrated alcohol, cold wind drying obtains AZ31 magnesium alloy
Polished surface.
Step 2: magnesium alloy polished surface blasting treatment
Blasting treatment is carried out to AZ31 magnesium alloy polished surface, sand-blasting abrasive selects quartz sand, quartz sand D50 median
0.1mm；Compressed gas selects high-purity argon gas (purity 99.999%), argon pressure 0.05MPa；Select the straight hole of diameter 12mm
Formula nozzle, nozzle and Mg alloy surface distance 300mm, abrasive material spray angle and 15 ° of Mg alloy surface normal angle, obtain coarse
Fine and close AZ31 magnesium alloy surface to be plated.
Step 3: polyaniline/iron composite coating preparation
(A) it selects conductive polyaniline powder and 99.9% high purity iron powder is composite coating constituent element, polyaniline powder D50
0.5 μm of median, 2 μm of high-purity iron powder D50 median, polyaniline powder/iron powder mass ratio 2, filming medium group becomes
The E51 type thermosetting epoxy resin of 70% mass fraction and the W93 curing agent of 30% mass fraction, polyaniline/iron mixed-powder
With filming medium mass ratio 0.02, magnet rotor stirs 10min, the coated solution being uniformly mixed.
(B) film layer coating is carried out to magnesium alloy surface to be plated using spin coater, magnesium alloy is fixed on spin coater turntable,
Coated solution obtained by third step (A) is added drop-wise to magnesium alloy surface to be plated using liquid-transfering gun, spin coater revolving speed 800rpm is lasting to revolve
Turn 10min, magnesium alloy after plated film is finally kept the temperature 24 hours at 80 DEG C, obtains what polyaniline/iron composite coating surface was modified
AZ31 magnesium alloy；Wherein, every 1cm22 μ L of coated solution is added dropwise in Mg alloy surface product.
Structural analysis and performance detection are carried out to sample obtained in embodiment 1:
(1) AZ31 Mg alloy surface polyaniline/iron composite coating microscopic appearance:
Polyaniline/iron composite coating microscopic appearance is observed using scanning electron microscope.By attached drawing 1 as it can be seen that 1 institute of embodiment
It obtains polyaniline powder and iron powder in composite coating and is evenly distributed on AZ31 Mg alloy surface, polyaniline powder is in fusiform pattern, single
Polyaniline powder D50 median median is about 0.5 μm, and a large amount of polyaniline powders agglomerate into 1~3 μm of size of group
Cluster；Iron powder be in irregular bulk morphologies, single 1~3 μm of size of iron powder D50 median.
(2) polyaniline/iron composite coating before modified after Corrosion Behaviors of Magnesium Alloys performance comparison
To surface, rear AZ31 Corrosion Behaviors of Magnesium Alloys performance carries out electro-chemical test in 25 DEG C, 3.5%NaCl solution before modified,
Using three-electrode system, platinode is saturated calomel as reference electrode, potential scanning speed 0.001v/s as auxiliary electrode.
By attached drawing 2 as it can be seen that the corrosion potential of the 1 modified AZ31 magnesium alloy of gained of embodiment is -0.77V/SCE, corrosion current is close
Degree is 0.23 × 10-6A/cm2；The corrosion potential of AZ31 magnesium alloy is -1.51V/SCE before modified, and corrosion current density is
12.41×10-6A/cm2, polyaniline/iron composite coating makes corrosion potential improve 740mV, and corrosion current density reduces
Nearly 54 times, improve the corrosion resistance of AZ31 magnesium alloy.
(3) polyaniline/iron composite coating rear Mg alloy surface resistance value comparison before modified
Using high accuracy number multimeter, to surface, rear AZ31 magnesium alloy carries out resistance measurement, test condition 20 before modified
DEG C, relative humidity 60%, sample is having a size of 10mm × 10mm × 1mm.By attached drawing 3 as it can be seen that the 1 modified AZ31 magnesium of gained of embodiment
Alloy surface resistance value is 1.2 ± 0.3k Ω, and AZ31 Mg alloy surface resistance value is 2.0 ± 0.5k Ω, polyaniline/iron before modified
Composite coating, which is not apparent from, destroys AZ31 Mg alloy surface electric conductivity.
Embodiment 2:
Step 1: magnesium alloy initial surface mechanically polishes
ZK60 magnesium alloy initial surface is pre-processed, respectively with 500#, 1000#, 1500# and 2000# waterproof abrasive paper into
Row polishing, removes surface scale and impurity, then carries out machine to polishing rear surface using the aluminum oxide polishing powder of 0.3 μm of partial size
Tool polishing, until removal surface scratch, is finally cleaned by ultrasonic 15min in dehydrated alcohol, cold wind drying obtains ZK60 magnesium alloy
Polished surface.
Step 2: magnesium alloy polished surface blasting treatment
Blasting treatment is carried out to ZK60 magnesium alloy polished surface, sand-blasting abrasive selects quartz sand, quartz sand D50 median
0.2mm；Compressed gas selects high-purity argon gas (purity 99.999%), argon pressure 0.15MPa；Select the straight hole of diameter 12mm
Formula nozzle, nozzle and Mg alloy surface distance 350mm, abrasive material spray angle and 20 ° of Mg alloy surface normal angle, obtain coarse
Fine and close ZK60 magnesium alloy surface to be plated.
Step 3: polyaniline/iron composite coating preparation
(A) it selects conductive polyaniline powder and 99.9% high purity iron powder is composite coating constituent element, polyaniline powder D50
2 μm of median, 5 μm of high-purity iron powder D50 median, polyaniline powder/iron powder mass ratio 3, filming medium group is as 70%
The E51 type thermosetting epoxy resin of mass fraction and the W93 curing agent of 30% mass fraction, polyaniline/iron mixed-powder at
Film medium mass ratio 0.03, magnet rotor stir 10min, the coated solution being uniformly mixed.
(B) film layer coating is carried out to magnesium alloy surface to be plated using spin coater, magnesium alloy is fixed on spin coater turntable,
Coated solution obtained by third step (A) is added drop-wise to magnesium alloy surface to be plated using liquid-transfering gun, spin coater revolving speed 900rpm is lasting to revolve
Turn 10min, magnesium alloy after plated film is finally kept the temperature 24 hours at 80 DEG C, obtains what polyaniline/iron composite coating surface was modified
ZK60 magnesium alloy；Wherein, every 1cm23 μ L of coated solution is added dropwise in Mg alloy surface product.
Through performance detection, the 2 modified ZK60 magnesium alloy corrosion potential of gained of embodiment is -0.74V/SCE, self-corrosion electricity
Current density is 0.18 × 10-6A/cm2；ZK60 magnesium alloy corrosion potential is -1.72V/SCE, corrosion current density before modified
It is 25.68 × 10-6A/cm2, polyaniline/iron composite coating makes corrosion potential improve 980mV, and corrosion current density reduces
143 times.In addition, surface conductivity test shows that polyaniline/iron composite coating is electrically conductive.
Embodiment 3:
Step 1: magnesium alloy initial surface mechanically polishes
WE43 magnesium alloy initial surface is pre-processed, respectively with 500#, 1000#, 1500# and 2000# waterproof abrasive paper into
Row polishing, removes surface scale and impurity, then carries out machine to polishing rear surface using the aluminum oxide polishing powder of 0.3 μm of partial size
Tool polishing, until removal surface scratch, is finally cleaned by ultrasonic 15min in dehydrated alcohol, cold wind drying obtains WE43 magnesium alloy
Polished surface.
Step 2: magnesium alloy polished surface blasting treatment
Blasting treatment is carried out to WE43 magnesium alloy polished surface, sand-blasting abrasive selects quartz sand, quartz sand D50 median
0.5mm；Compressed gas selects high-purity argon gas (purity 99.999%), argon pressure 0.25MPa；Select the straight hole of diameter 12mm
Formula nozzle, nozzle and Mg alloy surface distance 500mm, abrasive material spray angle and 25 ° of Mg alloy surface normal angle, obtain coarse
Fine and close WE43 magnesium alloy surface to be plated.
Step 3: polyaniline/iron composite coating preparation
(A) it selects conductive polyaniline powder and 99.9% high purity iron powder is composite coating constituent element, polyaniline powder D50
5 μm of median, 12 μm of high-purity iron powder D50 median, polyaniline powder/iron powder mass ratio 4, filming medium group is as 70%
The E51 type thermosetting epoxy resin of mass fraction and the W93 curing agent of 30% mass fraction, polyaniline/iron mixed-powder at
Film medium mass ratio 0.04, magnet rotor stir 10min, the coated solution being uniformly mixed.
(B) film layer coating is carried out to magnesium alloy surface to be plated using spin coater, magnesium alloy is fixed on spin coater turntable,
Coated solution obtained by third step (A) is added drop-wise to magnesium alloy surface to be plated using liquid-transfering gun, spin coater revolving speed 1000rpm continues
10min is rotated, magnesium alloy after plated film is finally kept the temperature 24 hours at 80 DEG C, it is modified to obtain polyaniline/iron composite coating surface
WE43 magnesium alloy, wherein every 1cm24 μ L of coated solution is added dropwise in Mg alloy surface product.
Through performance detection, the 3 modified WE43 magnesium alloy corrosion potential of gained of embodiment is -0.65V/SCE, self-corrosion electricity
Current density is 0.09 × 10-6A/cm2；WE43 magnesium alloy corrosion potential is -1.56V/SCE, corrosion current density before modified
It is 18.72 × 10-6A/cm2, polyaniline/iron composite coating makes corrosion potential improve 910mV, and corrosion current density reduces
208 times.In addition, surface conductivity test shows that polyaniline/iron composite coating is electrically conductive.
There is polyaniline/iron composite coating magnesium alloy can be used for electric conductivity on surface through the method for the invention preparation
The fields such as more demanding use environment, such as wireless transmission, electronic communication with corrosion resistance.Electrically conductive polyaniline powder has excellent
Corrosion resistance and good electric conductivity, the corrosion rate of the controllable magnesium alloy of iron powder, while it is wear-resisting to make up polyaniline powder
Property difference disadvantage, the two combine can effectively improve the corrosion resistant of magnesium alloy on the basis of not significantly reducing magnesium alloy electrology characteristic
Corrosion energy.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure transformation made by description of the invention and accompanying drawing content is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Unaccomplished matter of the present invention is well-known technique.
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| CN110144611A (en) * | 2019-06-10 | 2019-08-20 | 河北工业大学 | Corrosion-resistant and wear-resistant composite coating on magnesium alloy surface and preparation method thereof |
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| CN113584551A (en) * | 2021-09-14 | 2021-11-02 | 天津工业大学 | Magnesium alloy surface corrosion-resistant conductive coating and preparation method thereof |
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| CN116239906A (en) * | 2022-12-15 | 2023-06-09 | 北京石油化工学院 | Preparation method and application of conductive anti-corrosion coating for magnesium alloy bipolar plate |
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| CN110144611A (en) * | 2019-06-10 | 2019-08-20 | 河北工业大学 | Corrosion-resistant and wear-resistant composite coating on magnesium alloy surface and preparation method thereof |
| CN110144611B (en) * | 2019-06-10 | 2021-10-22 | 河北工业大学 | A kind of magnesium alloy surface corrosion-resistant and wear-resistant composite coating and preparation method thereof |
| CN110624517A (en) * | 2019-09-23 | 2019-12-31 | 成都先进金属材料产业技术研究院有限公司 | Nano hollow polyaniline and preparation method and application thereof |
| CN110624517B (en) * | 2019-09-23 | 2022-03-22 | 成都先进金属材料产业技术研究院股份有限公司 | Nano hollow polyaniline and preparation method and application thereof |
| US20220064787A1 (en) * | 2020-08-28 | 2022-03-03 | Changxin Memory Technologies, Inc. | Method for surface treatment of quartz component |
| CN113584551A (en) * | 2021-09-14 | 2021-11-02 | 天津工业大学 | Magnesium alloy surface corrosion-resistant conductive coating and preparation method thereof |
| CN113584551B (en) * | 2021-09-14 | 2022-04-12 | 天津工业大学 | Magnesium alloy surface corrosion-resistant conductive coating and preparation method thereof |
| CN116239906A (en) * | 2022-12-15 | 2023-06-09 | 北京石油化工学院 | Preparation method and application of conductive anti-corrosion coating for magnesium alloy bipolar plate |
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| CN109797394B (en) | 2020-10-09 |
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