CN109161869A - A method of corrosion-inhibiting coating is formed in metal part surface - Google Patents
A method of corrosion-inhibiting coating is formed in metal part surface Download PDFInfo
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- CN109161869A CN109161869A CN201811064393.7A CN201811064393A CN109161869A CN 109161869 A CN109161869 A CN 109161869A CN 201811064393 A CN201811064393 A CN 201811064393A CN 109161869 A CN109161869 A CN 109161869A
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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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/06—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
- C23C16/08—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material from metal halides
- C23C16/14—Deposition of only one other metal element
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
-
- 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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The present invention relates to a kind of methods for forming corrosion-inhibiting coating in metal part surface, and the corrosion-inhibiting coating includes one or more of rare non-ferrous layer, inorganic oxide layer, coating liquid layer；The forming method of the corrosion-inhibiting coating is one or more of chemical vapor deposition, dip coating, hot spray process.The present invention is particularly suitable for the anti-corrosion of liquid metal, avoids the direct contact of high temperature fluent metal and metal base, to reach corrosion-resistant effect by making a corrosion-inhibiting coating in metal part surface.It solves in use, etching problem of the high temperature fluent metal to substrate, reduce industrial cost, and expand the application range of liquid metal, there should be stronger corrosion resistance to liquid metal at service temperatures, and should have the characteristics that good cold-and-heat resistent impact property, adhesive force is strong, porosity is low.
Description
Technical field
The present invention relates to aseptic technics, and in particular to a method of corrosion-inhibiting coating is formed in metal part surface.
Background technique
Liquid metal typically refers to a kind of metal near room temperature for liquid, if fusing point is in 30 DEG C of galliums below or its conjunction
Gold, also or in such as 40 DEG C -200 DEG C low-melting point metal alloys that can be in a liquid state of slightly higher some temperature ranges.Liquid metal has
Low melting point, high boiling characteristic, if the fusing point of gallium is 29.77 DEG C, boiling point is 2403 DEG C.Utilize liquid metal low melting point, high boiling
Liquid metal, can be used for hydraulic drive, differential pressure transmitter by the characteristic of point.
The liquid mediums such as silicone oil, fluorocarbon oil, vegetable oil used in liquid metal substitution Traditional differential pressure transmitter, can solve
The problem of perishable under liquid medium high temperature in Traditional differential pressure transmitter, easy gasification, to meet differential pressure transmitter in superhigh temperature
Requirement under environment.
Liquid metal substitution traditional liquid medium has broad application prospects, but liquid metal is to being in direct contact with it
Metal has different degrees of corrosion, and temperature is higher, and corrosion condition is more serious, and which greatly limits the applications of liquid metal
Range, the etching problem for solving liquid metal are very urgent.
Summary of the invention
To solve the above problems, the present invention provides a kind of method for forming corrosion-inhibiting coating in metal part surface.The present invention
Provided corrosion-inhibiting coating is particularly suitable for the anti-corrosion of liquid metal, has stronger corrosion resistance to liquid metal at high temperature
Can, and have the characteristics that good cold-and-heat resistent impact property, adhesive force is strong, porosity is low.
In the method, the corrosion-inhibiting coating includes rare non-ferrous layer, inorganic oxide layer, in coating liquid layer
It is one or more of；
The forming method of the corrosion-inhibiting coating is one or more of chemical vapor deposition, dip coating, hot spray process.
The rare non-ferrous layer includes one or more of tungsten layer, rhenium layer, molybdenum and tungsten alloy layer；
Preferably, the forming method of the rare non-ferrous layer is one in chemical vapour deposition technique and hot spray process
Kind.
And/or
Preferably, it when carrying out coating treatment with chemical vapour deposition technique, is particularly suitable for being less than diameter (internal diameter)
The metal pipe internal wall of 10mm carries out coating treatment.
The rare non-ferrous layer is tungsten layer, it is preferred to use following processing method: to add after tungsten hexafluoride, hydrogen mixing
Heat is to 600-700 DEG C, holding 30-40min, and the volumetric usage ratio of the tungsten hexafluoride and hydrogen is 1:(3-5), throughput:
1.5-2L/min can form tungsten coating in the metal part surface.
It is highly preferred that the tungsten coating with a thickness of 20-25 μm.
The inorganic oxide layer includes one of beryllium oxide layer, alumina layer, zirconium oxide layer, silicon oxide layer or several
Kind；
Preferably, the forming method of the inorganic oxide layer is hot spray process.
Preferably, it when carrying out coating treatment with hot spray process, is particularly suitable for being greater than diameter (internal diameter) gold of 60mm
Metal conduit inner wall carries out coating treatment, is also applied for the coating treatment of planar metal material, and planar metal component of coatings handles nothing
Size limitation.
The inorganic oxide layer is alumina layer, it is preferred to use following processing method: 1. clean metal part surface,
Roughening, to increase the surface roughness of metal parts, surface roughness is Ra3.0-3.5 μm, to increase coating and metal parts
Adhesive force；2. preheated metallic component, preheating temperature is 100-150 DEG C；3. being sprayed on metal with traditional plasma spraying method
Parts surface first sprays one layer of adhesive layer, and to increase the adhesive force of alumina layer and metal parts, adhesive layer is nickel aluminium powder, nickel
One of chromium powder end or nickel chromium triangle aluminium powder, thickness of adhibited layer are 20-100 μm；4. spraying oxygen with traditional plasma spraying method
Change aluminized coating material；5. carrying out sealing pores using conventional hole sealing agent can be in the metal portion to reduce the porosity of coating
Part surface forms aluminum oxide coating layer.It is highly preferred that the inorganic oxide layer with a thickness of 0.05-0.5mm.
The coating liquid layer is inorganic nano paint layer or organic silicon high-temperature dope layer.
Preferably, the forming method of the coating liquid layer is dip coating.
Preferably, the liquid coating is by inorganic nano paint and diluent according to mass ratio (8-10): 1 ratio is mixed
It configures and obtains after conjunction.
Preferably, at room temperature (about 25 DEG C), the metallic conduit component is immersed in the liquid coating, it is right
The metal parts carries out dip-coating using liquid coating circulator with dip coating, after recycling 3-5min, is passed through air evacuated tube
Remaining coating in road last room temperature or is heating and curing spare with anti-clogging pipeline；Preferably, the liquid coating anti-corrosion applies
Layer with a thickness of 0.02mm -0.5mm.
Method of the present invention, the material of the metal parts are aluminium, copper, cast iron, stainless steel, titanium, nickel, Ti-Ni alloy
One of Deng.
Further, the present invention provides a kind of non-corrosive metal (NCM) component, the method as described in above-mentioned any one technical solution
The corrosion-inhibiting coating is sprayed to the metal surface of the metal parts and is obtained.
Meanwhile the forming method of corrosion-inhibiting coating proposed by the invention, it is specifically for use in the anti-corrosion of liquid metal.
Preferably, the liquid metal is gallium, in gallium-indium alloy, gallium-indium-tin alloy, gallium indium Zinc-tin alloy, gallium kirsite
It is one or more of.
Further, corrosion-inhibiting coating proposed by the invention is 500 DEG C or more using temperature.
Corrosion-inhibiting coating provided by the present invention should have stronger corrosion resistance to liquid metal at service temperatures, and
Should have the characteristics that good cold-and-heat resistent impact property, high adhesion force, low porosity.
The present invention avoids high temperature fluent metal and gold by making a corrosion-inhibiting coating in metal part surface (including inner wall etc.)
The direct contact for belonging to substrate, to reach corrosion-resistant effect.It solves in use, corruption of the high temperature fluent metal to substrate
Erosion problem reduces industrial cost, and expands the application range of liquid metal.
Detailed description of the invention
Fig. 1 is that metal pipe internal wall finishes cross-sectional view after corrosion-inhibiting coating.
Fig. 2 is that chemical vapor deposition plates tungsten flow chart；
Fig. 3 is the flow chart that corrosion-inhibiting coating is prepared with spray coating method；
Fig. 4 is hydrostatic transmission module schematic diagram after preservative treatment；
Fig. 5 is differential pressure transmitter liquid metal fill part schematic diagram after preservative treatment；
Fig. 6 is the flow chart that corrosion-inhibiting coating is prepared with the method for liquid preservative coating cyclic；
Appended drawing reference:
Metal pipe outer wall 1, inner wall of metal tube 2, corrosion-inhibiting coating 3, small piston 4, metal parts 5, liquid metal 6, pipeline 7,
Big piston 8, tungsten hexafluoride 9, hydrogen 10, gas mixture 11, phase depositing reaction chamber 12, exhaust-gas treatment recycling 13, diaphragm 14,
Pedestal 15, heat source 16, capillary 17, thermal spray feedstock 18, peristaltic pump 19, transmission channel 20, component to be processed 21, coating material cartridge
22, triple valve 23, left gas circuit pipe 24, right gas circuit pipe 25, transmission channel 26, transmission channel 27.
Specific embodiment
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Metallic conduit described in following embodiment belongs to the acceptable metal material in this field unless otherwise specified.
Embodiment 1
Referring to attached drawing 1,2, the present embodiment provides one kind to form resistance to liquid using chemical vapour deposition technique in metal part surface
The method of the corrosion-inhibiting coating of state metal erosion is metal parts with metallic conduit 7, is coating treatment, Fig. 1 to the inner wall of pipeline 7
Cross-sectional view after corrosion-inhibiting coating is finished for metal pipe internal wall, Fig. 2 is that chemical vapor deposition plates tungsten flow chart.
Specific step is as follows:
(1) it is dried after cleaning pipeline 7 with metal scavenger specially degreasing and rust removal, it is spare.
(2) it is reaction source gas with tungsten hexafluoride 9, tungsten hexafluoride 9 is heated to boiling point or more and is gasified, in gas mixer
Chemical vapor deposition reaction chamber 12 is passed through after being sufficiently mixed in 11 with hydrogen 10, ventilatory capacity is respectively as follows: tungsten hexafluoride: 2g/min,
Hydrogen: 1.5L/min.By heating 12 outer wall of phase depositing reaction chamber the pipeline 7 in phase depositing reaction chamber 12 is heated
To 600 DEG C of technological temperature, the gaseous mixture of tungsten hexafluoride 9 and hydrogen 10 is sent out after reaching technological temperature in phase depositing reaction chamber 12
Biochemical reaction generates tungsten atom and hydrogen fluoride, and tungsten atom meeting uniform adsorption ultimately forms tungsten coating 3 on 7 surface of pipeline, thick
Degree is 20 μm.React the hydrogen fluoride generated and the complete tungsten hexafluoride 9 of unreacted with hydrogen 10 to be discharged chemical vapor deposition anti-
Room 12 is answered, it is reusable through (exhaust-gas treatment recycling 13) processing recycling.
Preferably, pipeline described in the present embodiment is stainless steel material.
Embodiment 2
Referring to attached drawing 3, the present embodiment provides one kind to form resistance to liquid metal corruption using hot spray process in metal part surface
The method of the corrosion-inhibiting coating of erosion does aluminum oxide coating layer processing to the outer surface of metal parts 5, and Fig. 3 is to prepare anti-corrosion with spray coating method
The flow chart of coating；
Specific step is as follows: (1) by metal parts all purpose cleaner degreasing and rust removal, dried after cleaning, it is spare.
(2) 5 surface of component being pre-processed, pretreatment includes coarse surface, one layer of nickel-aluminum bond coating is preliminarily sprayed,
To enhance the bond strength of coating and substrate (using this field conventional means).
(3) using alumina powder as raw material (thermal spray feedstock 18), by heat source 16, melting or semi-molten state are heated to
(according to the judgement of those skilled in the art), while by the power of heat source stream itself in heat source 16 or by increasing outside
Fast air-flow makes it be atomized and be ejected at a high speed by forming corrosion-inhibiting coating 3 on pretreated 5 surface of metal parts.
Preferably, metal parts described in the present embodiment is one of aluminium, copper, stainless steel material.
Preferably, heat source described in the present embodiment is plasma flame.
Preferably, metal parts shape described in the present embodiment is the tubing that plate, bar or diameter are greater than 60mm.
Embodiment 3
Referring to attached drawing 4, the concrete application device that the present embodiment provides a kind of by coating treatment, the specific steps are as follows:
Fig. 4 is hydrostatic transmission module schematic diagram after preservative treatment.Before assembly, first to small piston 4, pipeline 7, big piston 8
Preservative treatment is done, a tungsten coating is done on the surface of pipeline 7, and the tungsten coating of pipeline 7 is carried out using the method for embodiment 1.In small piston 4
A tungsten coating is done with big 8 surface of piston, is carried out using the heat spraying method of embodiment 2.
Particularly, tungsten hexafluoride corrosivity is strong, facile hydrolysis, good leak tightness is required in entire vapor deposition processes, and to the greatest extent
Can divisible moisture and air, need to be vacuumized when necessary, and be passed through inertia protection gas.
Embodiment 4
Referring to attached drawing 5, the pressure difference transmitter device that the present embodiment provides a kind of by coating treatment, the specific steps are as follows:
Fig. 5 is differential pressure transmitter liquid metal fill part schematic diagram after preservative treatment.Diaphragm 14, pedestal 15, capillary 17 are assembled
After, corrosion-inhibiting coating, which is similarly, in the present embodiment obtains tungsten coating using the chemical vapour deposition technique of embodiment 1.Preferably,
The ventilatory capacity of the present embodiment is tungsten hexafluoride: 2g/min, and hydrogen: 2L/min, 600 DEG C of technological temperature, tungsten coating thickness is 25 μm.
Wherein, the thickness of tungsten coating can adjust according to actual needs the technological parameters such as temperature, gas flow to change.
Particularly, tungsten hexafluoride corrosivity is strong, facile hydrolysis, good leak tightness is required in entire vapor deposition processes, and to the greatest extent
Can divisible moisture and air, need to be vacuumized when necessary, and be passed through protection gas.
Embodiment 5
Referring to attached drawing 6, in the present embodiment, anti-corrosion is prepared in hydrostatic transmission module by the method for liquid preservative coating cyclic
Coating.Fig. 6 is the flow chart that corrosion-inhibiting coating is prepared with the method for liquid preservative coating cyclic；
Small piston 4, big piston 8 are dried for standby after all purpose cleaner cleans.It is then immersed in configured anti-corrosion
In coating, persistently takes out and be dried for standby after stirring 2min.Liquid will be accessed after component 21 to be processed all purpose cleaner cleaning, drying
State coating cyclic equipment.By configured liquid coating be added coating material cartridge 22 in, adjust triple valve 23, keep left gas circuit pipe 24,
Right gas circuit pipe 25 is in off state.Peristaltic pump 19 is opened, so that liquid preservative coating is in coating material cartridge 22, transmission channel 26, transmission
Channel 20, component to be processed (pipeline) 21, right-hand circular between transmission channel 27, after 3min to be recycled, closing transmission channel
26, left gas circuit pipe 24 is opened, compressed air is passed through, empties remaining coating in circulation route, with anti-clogging, after keeping 2min,
Left gas circuit pipe 24 is closed, transmission channel 26 is opened.Change peristaltic pump 19 to turn to, so that liquid preservative coating is in coating material cartridge 22, biography
Defeated channel 27, transmission channel 20, component to be processed 21, left-hand circular between transmission channel 26 after 3min to be recycled, are closed and are passed
Right gas circuit pipe 25 is opened in defeated channel 27, is passed through compressed air, keeps 2min.It may be repeated one or more times according to process requirement.To
After circulation terminates, component 21 to be processed is taken out into drying and small piston 4, big piston 8 and completes assembling together.
Preferably, liquid coating described in the present embodiment is inorganic nano paint.
Embodiment 6
With reference to attached drawing 5, attached drawing 6, in the present embodiment, using the method for liquid coating circulation to differential pressure transmitter liquid metal
Fill part carries out corrosion-inhibiting coating processing, and Coating Processes are the same as embodiment 5.
Concrete processing procedure is as follows: after first assembling diaphragm 14, pedestal 15, capillary 17, being passed through universal cleaning
It is dried after the cleaning of agent degreasing and rust removal, it is integrally then accessed into liquid coating recycle unit as component 21 to be processed.
Preferably, metal parts described in the present embodiment is stainless steel material.
Preferably, capillary diameter described in the present embodiment is 3mm.
Preferably, the corrosion-inhibiting coating of the present embodiment is with a thickness of 50 μm.
Comparative example 1
In this comparative example, titanium coating is prepared in stainless steel surface using the chemical vapour deposition technique of embodiment 1, applies thickness
20 μm of degree.
Comparative example 2
In this comparative example, stainless steel material is without any coating treatment.
Comparative example 3
In this comparative example, stainless steel material is handled by chemical nickel plating, and surface forms one layer 25 μm of nickel coating.
Test example
This test example provides embodiment 1,2,5, the test data of metallic conduit provided by comparative example 1-3, by test specimens
Liquid metal is added dropwise in product surface, judges coating result, as shown in table 1.
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 5 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Test temperature | 600℃ | 700℃ | 600℃ | 500℃ | 400℃ | 300℃ |
| Testing time | 100h | 100h | 100h | 2h | 2h | 2h |
| Corrosion condition | It is corrosion-free | It is corrosion-free | It is corrosion-free | Corrosion | Corrosion | Corrosion |
| Coating conditions | It is intact | It is intact | It is intact | It thickens | / | It falls off |
Although above having used general explanation, specific embodiment and test, the present invention is made to retouch in detail
It states, but on the basis of the present invention, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to claimed
Range.
Claims (10)
1. a kind of method for forming corrosion-inhibiting coating in metal part surface, which is characterized in that the corrosion-inhibiting coating includes rare having
One or more of non-ferrous metal layer, inorganic oxide layer, coating liquid layer；The forming method of the corrosion-inhibiting coating is chemical gas
Mutually one or more of deposition, dip coating, hot spray process.
2. the method according to claim 1, wherein the rare non-ferrous layer includes tungsten layer, rhenium layer, molybdenum tungsten
One or more of alloy-layer；
Preferably, the forming method of the rare non-ferrous layer is one of chemical vapour deposition technique and hot spray process.
3. method according to claim 1 or 2, which is characterized in that the rare non-ferrous layer is with chemical vapor deposition
Method carries out coating treatment, and the metal part surface is the inner wall of metallic conduit of the diameter less than 10mm.
4. method according to claim 1-3, which is characterized in that the rare non-ferrous layer is tungsten layer；
Corrosion-inhibiting coating is formed with the following method: to be heated to 600-700 DEG C after tungsten hexafluoride, hydrogen mixing, keeping 30-
The volumetric usage ratio of 40min, the tungsten hexafluoride and hydrogen is 1:(3-5), throughput: 1.5-2L/min；
And/or the tungsten layer with a thickness of 20-25 μm.
5. method according to claim 1-4, which is characterized in that the inorganic oxide layer includes beryllium oxide
One or more of layer, alumina layer, zirconium oxide layer, silicon oxide layer；
Preferably, the forming method of the inorganic oxide layer is hot spray process；
It is highly preferred that the metal part surface is the inner wall of metallic conduit of the diameter greater than 60mm or the table of planar metal material
Face.
6. method according to claim 1-5, which is characterized in that the inorganic oxide layer with a thickness of
0.05-0.5mm；
Preferably, the inorganic oxide layer is alumina layer, forms corrosion-inhibiting coating with the following method: 1. by metal parts table
Face is cleaned, is roughened, and Ra3.0-3.5 μm of surface roughness of the metal parts is made；2. preheated metallic component, preheating temperature are
100-150℃；3. first spraying one layer of adhesive layer in metal part surface, adhesive layer is nickel aluminium powder, nickel chromium triangle powder or nickel chromium triangle aluminium
One of powder, thickness of adhibited layer are 20-100 μm；4. spray aluminum oxide coating material；5. sealing pores.
7. method according to claim 1-6, which is characterized in that the coating liquid layer is inorganic nano paint
Layer or organic silicon high-temperature dope layer；
Preferably, the forming method of the coating liquid layer is dip coating；
And/or the liquid coating is by inorganic nano paint and diluent according to mass ratio (8-10): being matched after the mixing of 1 ratio
It sets and obtains；
And/or the coating liquid layer with a thickness of 0.02mm-0.5mm.
8. method according to claim 1-7, which is characterized in that the material of the metal part surface be aluminium,
One of copper, cast iron, stainless steel, titanium, nickel, Ti-Ni alloy.
9. a kind of non-corrosive metal (NCM) component, which is characterized in that from the described in any item methods of claim 1-8 to the metal parts
Metal surface spray the corrosion-inhibiting coating and obtain.
10. non-corrosive metal (NCM) component according to claim 9 is used for the application of liquid metal corrosion-resistant；
Preferably, the liquid metal is one of gallium, gallium-indium alloy, gallium-indium-tin alloy, gallium indium Zinc-tin alloy, gallium kirsite
Or it is several.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863165A (en) * | 2019-12-06 | 2020-03-06 | 中国石油集团西部钻探工程有限公司 | Self-polishing anti-corrosion and anti-scale coating and preparation method thereof |
| CN112756238A (en) * | 2020-12-29 | 2021-05-07 | 合肥工业大学 | Method for preparing silicon dioxide hydrogen-resistant coating on inner wall of 316L stainless steel pipeline |
| WO2023216467A1 (en) * | 2022-05-13 | 2023-11-16 | 云南中宣液态金属科技有限公司 | Metal structural member used in cooperation with gallium-based liquid metal, manufacturing method therefor, and application thereof |
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