CN109136828A - A kind of Zn-Al-Ni anti-corrosion function infiltration layer preparation method - Google Patents
A kind of Zn-Al-Ni anti-corrosion function infiltration layer preparation method Download PDFInfo
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- CN109136828A CN109136828A CN201811130096.8A CN201811130096A CN109136828A CN 109136828 A CN109136828 A CN 109136828A CN 201811130096 A CN201811130096 A CN 201811130096A CN 109136828 A CN109136828 A CN 109136828A
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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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/02—Pretreatment of the material to be coated
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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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/34—Embedding in a powder mixture, i.e. pack cementation
- C23C10/52—Embedding in a powder mixture, i.e. pack cementation more than one element being diffused in one step
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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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/60—After-treatment
Abstract
The invention discloses a kind of Zn-Al-Ni anti-corrosion function infiltration layer preparation methods, the institutional framework for usually changing existing mechanical energy aided diffusion zinc-aluminium infiltration layer by the way that Al, Ni member are added in zincizing agent.The proportion (penetration enhancer total number is 100 parts) of its penetration enhancer is as follows: 20-50 parts of zinc powder (for penetration enhancer), 5-25 parts of aluminium powder (for penetration enhancer), 0.5-5 parts of nickel powder (for penetration enhancer), 0.1-2 parts of ammonium chloride (activator), 0.1-2 parts of rare earth (catalyst), surplus Al2O3Powder (filler).The Zn-Al-Ni anticorrosion antiwear function infiltration layer the preparation method is as follows: by the zinc powder, aluminium powder, nickel powder, rare earth and Al2O3After powder is uniformly mixed according to a ratio, weighing is stand-by；Finally 3-5h is kept the temperature in the case where holding temperature is 450 DEG C, seeps the technological parameter that furnace revolving speed is 5-7r/min.The infiltration layer formula powder particle size that the present invention uses ensure that quality layer, and the Zn-Al-Ni alloying layer thickness of preparation is thin, surface soundness is good, hardness is high, antiseptic property is excellent.
Description
Technical field
The present invention relates to the powder zincizing technical fields of metal surface, and in particular to a kind of Zn-Al-Ni anti-corrosion function infiltration layer
Preparation method.
Background technique
In recent years, with the fast development of the production industries such as automobile, space flight, machinery, building, the energy, to as interconnecting piece
The bolt of part proposes requirements at the higher level, but following, the problem of major accident occurs in world wide because of bolt corrosion
Interior frequent generation, causes huge loss.Therefore, the corrosion resistance research of fastener bolt becomes the research of current bolt
One hot spot direction.Fastener bolt surface anticorrosive processing technique mainly has powder zincizing, galvanizing by dipping, electricity both at home and abroad at present
Zinc-plated, Dacroment, surface granosealing, organic coating and different composite coatings etc..Compared to powder zincizing, other are various
Surface anticorrosive processing technique be there is a problem that larger.Wherein easily there is list edge in galvanizing by dipping, and bolt is caused to screw difficulty；
Electrogalvanizing is seriously polluted, there are problems that hydrogen embrittlement；The Cr of Dacroment6+It is harmful to human body and environment；Surface granosealing corrosion resisting property
Generally, the surface of grease equipment easy to pollute；Organic coating wear-resisting property is poor, and bolt screws cracky；Composite coating complex process,
Higher cost.
Traditional powder zincizing technology in terms of fastener method using very extensive, but with the development of industry, respectively
The generation of the harsh natural environment of kind, traditional powder zincizing technology have increasingly been unsatisfactory for the anticorrosion demand of fastener.Therefore,
Under the promotion of economy and energy sustainable development, low temperature environment alloyed layer and its technique are studied, infiltration layer can not only be improved
Anti-corrosion effect can also reduce cost, energy conservation and environmental protection, there is important promotion to make the development for the industry for pushing Metal surface anti-corrosion
With.
Summary of the invention
In view of this, it is an object of the present invention to provide a kind of Zn-Al-Ni anti-corrosion function infiltration layer preparation methods.
For realize foregoing invention purpose, the invention adopts the following technical scheme:
A kind of Zn-Al-Ni anti-corrosion function infiltration layer preparation method, which is characterized in that as unit of parts by weight (totally 100 parts),
The penetration enhancer of Zn-Al-Ni infiltration layer matches are as follows: 20-50 parts of zinc powder (for penetration enhancer), 5-25 parts of aluminium powder (for penetration enhancer), nickel powder (for penetration enhancer)
0.5-5 parts, 0.1-2 parts of ammonium chloride (activator), 0.1-2 parts of rare earth (catalyst), surplus Al2O3Powder (filler).It is protecting
Temperature is 450 DEG C, soaking time 3-7h, seeps and uses mechanical energy aided diffusion skill under the technological parameter that furnace revolving speed is 3-10r/min
Art prepares the Zn-Al-Ni infiltration layer of different alloying layer thicknesses；
Preferably, the zinc powder accounts for 25-40 part of penetration enhancer gross mass (100 parts), granularity is 300-400 mesh；
Preferably, the aluminium powder accounts for 10-20 part of penetration enhancer gross mass (100 parts), granularity is 300-400 mesh；
Preferably, the nickel powder accounts for 0.5-2 part of penetration enhancer gross mass (100 parts), granularity is 300-400 mesh；
Preferably, the ammonium chloride accounts for 0.01-0.05 part of penetration enhancer gross mass (100 parts), granularity is 300-500 mesh；
Preferably, the rare earth accounts for 0.5-1 part of penetration enhancer gross mass (100 parts), granularity is 100-200 mesh；Described
Catalyst is rare earth, the La that mass percentage is 25%~30%, the Nb of 50%~55% Ce and 15%~20%, grain
Degree is 200-400 mesh.
Preferably, the soaking time is 4-5h；
Preferably, the infiltration furnace revolving speed is 5-7r/min；
A kind of Zn-Al-Ni anti-corrosion function infiltration layer preparation method is made by following steps:
1) base material treatment: substrate being put into ultrasonic cleaning equipment and cleans 15-30min to remove the greasy dirt of matrix surface,
After substrate takes out drying, then substrate is put into shot-blast apparatus, matrix is carried out at ball blast using the shot of diameter 0.1-0.3mm
Reason (5-10min) is to remove substrate surface corrosion；
2) penetration enhancer configures: diffusion agent formulation is pressed, to zinc powder, aluminium powder, nickel powder, rare earth and Al2O3The powders such as powder are claimed respectively
Weight is simultaneously uniformly mixed with meal mixer, is given over to stand-by
3) mechanical auxiliary seeps: before shove charge, weigh ammonium chloride by Ji proportion is seeped, and be mixed into configured penetration enhancer, by substrate and
Penetration enhancer is fitted into flue, and the two total volume accounts for the 70-80% in flue space, and flue is put into and is seeped in furnace, with the infiltration of 5-10r/min
Furnace revolving speed keeps the temperature 3-6h under the holding temperature for 450 DEG C；
4) refrigerated separation: after heat preservation 3-6h, bell is opened, closes heating system, flue is allowed to continue with the revolving speed of 10r/min
Rotation, until being air-cooled to room temperature.Then substrate after cooling is taken out, is put into ultrasonic cleaning equipment and cleans 10min removal work
The floating ash on part surface；
By above-mentioned preparation method, the Zn-Al-Ni alloying layer thickness of preparation is relatively thin, continuous, uniform, fine and close, surface hardness
Height, with a thickness of 20-40 μm, preparation temperature is low (450 DEG C), will not change original mechanical performance of substrate, and has excellent resistance to
Grind performance and anti-corrosion effect.
The present invention has the advantages that
1. the present invention by the basis of mechanical energy aided diffusion zinc introduce aluminium, nickel element, successfully prepared compactness and
The ultra-thin infiltration layer (20-40 μm) that surface hardness greatly increases, ultra-thin alloying layer thickness answer the application range of infiltration layer more extensively (such as
With on the lesser bolt of diameter, nut fastener without influencing its cooperation)；
2. the present invention has been prepared under 450 DEG C of low temperature environment by the regulation to Ji formula and technological parameter is seeped
Zn-Al-Ni infiltration layer, the reduction of holding temperature is so that the material category that the infiltration layer can be applied on the basis of not influencing substrate performance
Increase, and its production stability is good, energy conservation and environmental protection；
3. Zn-Al-Ni infiltration layer prepared by the present invention has a wide range of application, technological parameter is controllable, powder recoverable, and
And its preparation process is simple and convenient to operate, is easy to industrial mass production.
Detailed description of the invention
Fig. 1 is different embodiments of the invention SEM surface topography and Cross Section Morphology figure: (a) and (b): pure zinc infiltration layer；(c) and
(d): embodiment 1；(e) and (f): embodiment 2；(g) and (h): embodiment 3；
Fig. 2 is the polarization curve spectrogram of different embodiments of the invention；
Fig. 3 is the sample macro morphology figure of salt spray test of the present invention different embodiments after 30 days: (a): matrix；(b): implementing
Example 1；(c): embodiment 2；(d): embodiment 3；
Fig. 4 is the surface hardness curve of different embodiments of the invention.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention are described in further detail.
Embodiment 1:
The Zn-Al-Ni anti-corrosion function infiltration layer of the present embodiment is prepared by following preparation technology parameter and step:
1) base material treatment: substrate is put into ultrasonic cleaning equipment and cleans 20min to remove the greasy dirt of matrix surface, substrate
It takes out after drying up, then substrate is put into shot-blast apparatus, Shot Blasting 10min is carried out to matrix using the shot of diameter 0.2mm
To remove substrate surface corrosion；
2) penetration enhancer configures: pressing diffusion agent formulation (totally 100 parts): 35 parts of zinc powder (400 mesh), 15 parts of aluminium powder (325 mesh), nickel powder
1 part of (300 mesh), 0.5 part of rare earth (400 mesh) (the Nb composition of the La that mass percentage is 30%, 55% Ce and 15%),
Al2O348.48 parts of powder (200 mesh) carries out weighing and being uniformly mixed with meal mixer respectively, separately weighs ammonium chloride (400 mesh)
It 0.02 part, gives over to stand-by；
3) mechanical auxiliary seeps: before shove charge, being mixed into configured by load weighted 0.02 part of ammonium chloride but is not yet mixed into ammonium chloride
Penetration enhancer in, substrate and penetration enhancer are fitted into flue, the two total volume accounts for the 70% of flue space, by flue be put into seep furnace in,
4h is kept the temperature under the holding temperature for 450 DEG C with the infiltration furnace revolving speed of 5r/min；
4) refrigerated separation: after heat preservation 4h, bell is opened, heating system is closed, flue is allowed to continue to revolve with the revolving speed of 10r/min
Turn, until being air-cooled to room temperature.Then substrate after cooling is taken out, is put into ultrasonic cleaning equipment and cleans 10min removal workpiece
The floating ash on surface, pack are sealed up for safekeeping；
Pass through the progress surface SEM Zn-Al-Ni infiltration layer to preparation (Fig. 1 (c) and (d)) and zinc coat (Fig. 1 (a) and (b))
The comparison of pattern and Cross Section Morphology finds that Zn-Al-Ni layer surface lamellar metallics stacks close, the hole of layer surface
Gap is few, and compactness will be significantly larger than zinc coat.It is characterized by antiseptic property of the electrochemistry experiment to infiltration layer, Fig. 2 is infiltration layer
Polarization curve.Corrosion potential, corrosion current and the low frequency range impedance magnitude of zinc coat respectively -0.9761V,
4.1194μA/cm2With 1091.3 Ω/cm2；After substrate is carried out the preparation of Zn-Al-Ni infiltration layer, corrosion potential, corrosion current
It is respectively -0.9437V, 3.037 μ A/cm and 1778.2 Ω/cm with low frequency range impedance magnitude2, and found by Fig. 3, salt fog
The surface corrosion situation of infiltration layer sample will be far below matrix surface after test 30 days, illustrate its corrosion resistance more preferably.Due to seeping
Layer thinner thickness measures layer surface hardness to measure the superiority and inferiority of infiltration layer wear-resisting property, as a result, it has been found that, preparation
37.6 μm of Zn-Al-Ni layer surface hardness be 464HV0.05, and zinc coat surface hardness is 315HV0.05, illustrate Zn-Al-
Ni infiltration layer can significantly improve the wear-resisting property of infiltration layer.
Embodiment 2:
The Zn-Al-Ni anti-corrosion function infiltration layer of the present embodiment is prepared by following preparation technology parameter and step:
1) base material treatment: substrate is put into ultrasonic cleaning equipment and cleans 20min to remove the greasy dirt of matrix surface, substrate
It takes out after drying up, then substrate is put into shot-blast apparatus, Shot Blasting 10min is carried out to matrix using the shot of diameter 0.2mm
To remove substrate surface corrosion；
2) penetration enhancer configures: pressing diffusion agent formulation (totally 100 parts): 35 parts of zinc powder (400 mesh), 15 parts of aluminium powder (325 mesh), nickel powder
1.5 parts of (400 mesh), 0.5 part of rare earth (400 mesh) (the Nb composition of the La that mass percentage is 30%, 52% Ce and 18%),
Al2O347.98 parts of powder (200 mesh) carries out weighing and being uniformly mixed with meal mixer respectively, separately weighs ammonium chloride (400 mesh)
It 0.02 part, gives over to stand-by；
3) mechanical auxiliary seeps: before shove charge, being mixed into configured by load weighted 0.02 part of ammonium chloride but is not yet mixed into ammonium chloride
Penetration enhancer in, substrate and penetration enhancer are fitted into flue, the two total volume accounts for the 70% of flue space, by flue be put into seep furnace in,
4h is kept the temperature under the holding temperature for 450 DEG C with the infiltration furnace revolving speed of 5r/min；
4) refrigerated separation: after heat preservation 4h, bell is opened, heating system is closed, flue is allowed to continue to revolve with the revolving speed of 10r/min
Turn, until being air-cooled to room temperature.Then substrate after cooling is taken out, is put into ultrasonic cleaning equipment and cleans 10min removal workpiece
The floating ash on surface, pack are sealed up for safekeeping；
By the test method of scanning electron microscope (SEM) observation, electrochemical test and surface hardness measurement to the tissue of infiltration layer
Structure, antiseptic property and wear-resisting property are analyzed.Fig. 1 (e) and (f) show scanning electron microscope (SEM) observation as a result, with real
Apply example 1, which is 28.671 μm, infiltration layer is continuous, uniformly, surface compact, roughness it is low.The examination of corrosion resisting property shown in Fig. 2
After the polarization curve tested is as a result, carry out the preparation of Zn-Al-Ni infiltration layer for substrate, corrosion potential, corrosion current and low frequency range resistance
Anti- modulus value is respectively -0.9301V, 2.4477 μ A/cm2With 2103.4 Ω/cm2, compared with zinc coat, corrosion resistance is significantly improved.Knot
Closing Fig. 3 can be seen that the appearance slight erosion of infiltration layer sample after salt spray test 30 days, and thick corrosion then occurs in matrix surface
As a result product illustrates, the excellent anti-corrosion performance of the Zn-Al-Ni infiltration layer obtained after mechanical energy aided diffusion.In order to zinc-aluminium infiltration layer
Wear-resisting property be further analyzed, surface hardness measurement has been carried out to it, measurement result is as shown in figure 4, mechanical energy helps
Zn-Al-Ni infiltration layer after seeping preparation, wear-resisting property are improved, and layer surface hardness reaches 486HV0.05。
Embodiment 3:
The Zn-Al-Ni anti-corrosion function infiltration layer of the present embodiment is prepared by following preparation technology parameter and step:
1) base material treatment: substrate is put into ultrasonic cleaning equipment and cleans 20min to remove the greasy dirt of matrix surface, substrate
It takes out after drying up, then substrate is put into shot-blast apparatus, Shot Blasting 10min is carried out to matrix using the shot of diameter 0.2mm
To remove substrate surface corrosion；
2) penetration enhancer configures: pressing 35 parts of diffusion agent formulation (totally 100 parts) zinc powder (400 mesh), 15 parts of aluminium powder (325 mesh), nickel powder
2 parts of (400 mesh), 0.5 part of rare earth (400 mesh) (the Nb composition of the La that mass percentage is 33%, 52% Ce and 15%),
Al2O347.48 parts of powder (200 mesh) carries out weighing and being uniformly mixed with meal mixer respectively, another individually to weigh ammonium chloride
0.02 part of (400 mesh) gives over to stand-by；
3) mechanical auxiliary seeps: before shove charge, being mixed into configured by load weighted 0.02 part of ammonium chloride but is not yet mixed into ammonium chloride
Penetration enhancer in, substrate and penetration enhancer are fitted into flue, the two total volume accounts for the 70% of flue space, by flue be put into seep furnace in,
4h is kept the temperature under the holding temperature for 450 DEG C with the infiltration furnace revolving speed of 5r/min；
4) refrigerated separation: after heat preservation 4h, bell is opened, heating system is closed, flue is allowed to continue to revolve with the revolving speed of 10r/min
Turn, until being air-cooled to room temperature.Then substrate after cooling is taken out, is put into ultrasonic cleaning equipment and cleans 10min removal workpiece
The floating ash on surface, pack are sealed up for safekeeping；
It is identical with above-mentioned Examples 1 and 2, pass through scanning electron microscope (SEM) observation, electrochemical test, salt spray test and surface
The test method of hardness measurement analyzes the institutional framework of infiltration layer, antiseptic property and wear-resisting property, test result point
Not as shown in Fig. 1 (g) and (h), Fig. 2, Fig. 3 and Fig. 4.The Zn-Al-Ni alloying layer thickness is only 23.876 μm, and surface compact is coarse
Spend low, show excellent anti-corrosion and wear-resisting property, corrosion potential, corrosion current and impedance value be respectively -0.92V,
1.7091μA/cm2With 3177.8 Ω/cm2, infiltration layer layer surface hardness reach HV0.05557。
Through the foregoing embodiment and the experimental results showed that, the present invention prepared by Zn-Al-Ni layer surface thickness ultrathin,
Roughness is low, has excellent anticorrosion antiwear effect, the main reason is that since the addition of aluminium powder, nickel powder in penetration enhancer makes infiltration layer
Institutional framework changes, and compactness increases.The trend of corrosive medium intrusion infiltration layer is slowed down, so that it is excellent to have infiltration layer
Anticorrosion antiwear effect.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Invention is explained in detail for good embodiment, those skilled in the art should understand that, it can be to of the invention
Technical solution is modified or replaced equivalently, in the limited range of the claims in the present invention.
Claims (8)
1. a kind of Zn-Al-Ni anti-corrosion function infiltration layer preparation method, which is characterized in that as unit of parts by weight, Zn-Al-Ni infiltration layer
Penetration enhancer proportion are as follows: for 20-50 parts of penetration enhancer zinc powder, for 5-25 parts of penetration enhancer aluminium powder, for 0.5-5 parts of penetration enhancer nickel powder, activator chlorination
0.1-2 parts of ammonium, 0.1-2 parts of catalyst rare earth, filler surplus are Al2O3Powder；Total number is 100 parts.
2. the method according to claim 1, wherein the zinc powder particle size is 200-400 mesh, zinc content 99%
More than.
3. the method according to claim 1, wherein the aluminum powder particle size is 200-400 mesh, aluminum content 99%
More than.
4. the method according to claim 1, wherein the nickel powder granularity is 200-400 mesh, nickel content 99%
More than.
5. Zn-Al-Ni anti-corrosion function infiltration layer preparation method according to claim 1, which is characterized in that the chlorination
Ammonium, granularity are 200-500 mesh.
6. Zn-Al-Ni anti-corrosion function infiltration layer preparation method according to claim 1, which is characterized in that the rare earth,
The La that mass percentage is 25%~30%, the Nb of 50%~55% Ce and 15%~20%, granularity are 200-400 mesh.
7. Zn-Al-Ni anti-corrosion function infiltration layer preparation method according to claim 1, which is characterized in that Al2O3Powder,
Granularity is 50-200 mesh.
8. preparing a kind of method of Zn-Al-Ni anti-corrosion function infiltration layer as described in claim 1, which is characterized in that the function
Infiltration layer is made by following steps:
1) base material treatment: substrate is put into ultrasonic cleaning equipment and cleans 15-30min to remove the greasy dirt of matrix surface, substrate
It takes out after drying up, then substrate is put into shot-blast apparatus, Shot Blasting 5- is carried out to matrix using the shot of diameter 0.1-0.3mm
10min is to remove substrate surface corrosion；
2) penetration enhancer configures: diffusion agent formulation is pressed, to zinc powder, aluminium powder, nickel powder, rare earth and Al2O3Powder powder is weighed respectively to be used in combination
Meal mixer is uniformly mixed, and is given over to stand-by；
3) mechanical auxiliary seeps: before shove charge, weighing ammonium chloride by Ji proportion is seeped, and be mixed into infiltration that is configured but being not yet mixed into ammonium chloride
In agent, then substrate and penetration enhancer are fitted into flue, substrate and penetration enhancer total volume account for the 70-80% in flue space, and flue is put
To seeping in furnace, 3-6h is kept the temperature under the holding temperature for 450 DEG C with the infiltration furnace revolving speed of 5-10r/min；
4) refrigerated separation: opening bell, closes heating system, flue is allowed to continue to rotate with the revolving speed of 10r/min, until being air-cooled to
Room temperature；Then substrate after cooling is taken out, is put into the floating ash of cleaning removal workpiece surface in ultrasonic cleaning equipment.
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| CN111926286A (en) * | 2020-08-14 | 2020-11-13 | 洛阳鑫益达工业设备有限公司 | Environment-friendly multi-component alloy co-permeation agent and multi-component alloy diffusion anticorrosive coating production process |
| CN112030091A (en) * | 2020-09-11 | 2020-12-04 | 霸州市青朗环保科技有限公司 | Method for preparing composite coating on surface of metal product |
| CN112080719A (en) * | 2020-08-26 | 2020-12-15 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Multi-element alloy co-permeation agent for elastic strip and elastic strip surface composite corrosion prevention process |
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