CN109023391A - The removal liquid of metal surface coat of aluminide and its preparation method and application method - Google Patents
The removal liquid of metal surface coat of aluminide and its preparation method and application method Download PDFInfo
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- CN109023391A CN109023391A CN201810898551.2A CN201810898551A CN109023391A CN 109023391 A CN109023391 A CN 109023391A CN 201810898551 A CN201810898551 A CN 201810898551A CN 109023391 A CN109023391 A CN 109023391A
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- removal liquid
- aluminide
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- water
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/10—Other heavy metals
- C23G1/106—Other heavy metals refractory metals
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- General Chemical & Material Sciences (AREA)
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- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
Abstract
The invention discloses a kind of removal liquid of metal surface coat of aluminide and its preparation method and application methods, to remove the total weight of liquid, the removal liquid include: nitric acid 8-32wt%, iron chloride 0-7wt%, sulfamic acid 8-32wt%, copper sulphate 0-5wt%, surplus be water.Technical solution of the present invention can cause part size overproof and the problem of blast goes removing coating to cause part deformation to avoid due to turnery processing.
Description
Technical field
The invention belongs to coating removal liquid technical fields, more particularly, to a kind of going for metal surface coat of aluminide
Except liquid and its preparation method and application method.
Background technique
Coat of aluminide has the function of protecting titanium alloy component on aero-engine high temperature alloy part, can be improved conjunction
The corrosion-resistant and resistant to high temperature ability of metal parts.But coat of aluminide can generate abrasion or fall off after being used for a long time, lead to titanium
Alloy part is not able to satisfy size requirement.Therefore, it is necessary to remove the coat of aluminide on alloy part surface.At present frequently with machinery
Processing method or blast method remove coat of aluminide, coat one layer of new coat of aluminide again then to guarantee protection effect.
But mechanical turning method is used to remove coat of aluminide, it be easy to cause part size overproof, and cannot be completely by primer coating
Remove, after in turn resulting in spraying again, technical requirements are not achieved in coating binding force, lead to the coating shedding in test run, exist tight
Weight hidden danger of quality.Meanwhile for the part of threaded surface spraying coat of aluminide, if individually using mechanical turning method, both
Having damaged screw thread again cannot be clean by the coating removal of thread surface, has seriously affected the performance of titanium alloy.And use blast side
Method removal coat of aluminide easily causes part deformation.Therefore, it is necessary to a kind of minimizing technology of coat of aluminide be provided, to keep away
Exempt from overproof, the deformation that lead to workpiece.
Summary of the invention
The purpose of the present invention is overcoming the deficiencies of existing technologies, a kind of removal liquid of metal surface coat of aluminide is provided,
Cause part size overproof and the problem of blast goes removing coating to cause part deformation to avoid due to turnery processing.
To achieve the goals above, the first aspect of the present invention provides a kind of removal liquid of metal surface coat of aluminide,
To remove the total weight of liquid, the removal liquid include: nitric acid 8-32wt%, iron chloride 0-7wt%, sulfamic acid 8-32wt%,
Copper sulphate 0-5wt%, surplus are water.
The second aspect of the present invention provides a kind of preparation method of the removal liquid of above-mentioned metal surface coat of aluminide, the system
Preparation Method includes: to be uniformly mixed nitric acid, sulfamic acid, water and optional copper sulphate and iron chloride, obtains the removal liquid.
The third aspect of the present invention provides a kind of application method of the removal liquid of above-mentioned metal surface coat of aluminide, this is answered
It include: to immerse part in the removal liquid with method, heating is impregnated.
Technical solution of the present invention has the advantages that
(1) method of the invention compares mechanical means, has the characteristics that simple process, strong operability, safety, simultaneously
Part can be greatly lowered and reprocess cost.
(2) technical solution of the present invention can cause part size overproof and blast removal painting to avoid due to turnery processing
The problem of layer causes part deformation.It is reprocessed for aluminum oxide coating layer and provides technical guarantee, avoid directly scrapping for part.
(3) removal liquid of the invention can not only remove aluminum oxide coating layer, and corruption will not be caused to high temperature alloy matrix
Erosion.
(4) it can integrally enter slot for the part of welding in process of production using removal liquid of the invention to handle, not have to protect
Non- coating surface is protected, uncoated surface will not generate excessive erosion.
Other features and advantages of the present invention will then part of the detailed description can be specified.
Detailed description of the invention
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein in exemplary embodiment of the invention, identical reference label
Typically represent same parts.
Fig. 1 shows surface according to an embodiment of the invention with coat of aluminide after hot tinting is handled
Piece surface photo.
Zero after the hot tinting quality inspection that Fig. 2 shows according to an embodiment of the invention by removing coat of aluminide
Part surface picture.
Fig. 3 a- Fig. 3 c respectively illustrates the removal calorize according to an embodiment of the invention by different soaking times
The metallographic of part after object coating detects photo, wherein the time that the part of Fig. 3 a- Fig. 3 c impregnates in removal liquid is respectively
0min, 30min and 60min.
Specific embodiment
The preferred embodiment of the present invention is described in more detail below.Although the following describe preferred implementations of the invention
Mode, however, it is to be appreciated that may be realized in various forms the present invention without that should be limited by the embodiments set forth herein.Phase
Instead, these embodiments are provided so that the present invention is more thorough and complete, and can be by the scope of the present invention completely
It is communicated to those skilled in the art.
The first aspect of the present invention provides a kind of removal liquid of metal surface coat of aluminide, to remove the total weight of liquid
Meter, which includes: nitric acid 8-32wt%, iron chloride 0-7wt%, sulfamic acid 8-32wt%, copper sulphate 0-5wt%, remaining
Amount is water.
In accordance with the present invention it is preferred that the removal liquid includes: nitric acid 8-32wt%, chlorination to remove the total weight of liquid
Iron 1-7wt%, sulfamic acid 8-32wt%, copper sulphate 1-5wt%, surplus are water；Wherein, the iron chloride is more preferably
1-5wt%.
The second aspect of the present invention provides a kind of preparation method of the removal liquid of above-mentioned metal surface coat of aluminide, the system
Preparation Method includes: to be uniformly mixed nitric acid, sulfamic acid, water and optional copper sulphate and iron chloride, obtains the removal liquid.
In accordance with the present invention it is preferred that the preparation method includes: that the water of half water is put into slot, it is then slowly added into
Nitric acid, sulfamic acid, remaining water and optional iron chloride and copper sulphate are uniformly mixed, obtain the removal liquid.
The third aspect of the present invention provides a kind of application method of the removal liquid of above-mentioned metal surface coat of aluminide, this is answered
It include: to immerse part in the removal liquid with method, heating is impregnated.
Preferably, it before removing Parts Surface Coating, first successively degreased, blasting treatment and removed to part
Sand processing.Wherein, the blasting treatment is that wet abrasive blasting processing or dry blasting are handled；If part has cooling hole, need to make
With thumbstall, index finger cover or with protective rubber band, root of blade is protected, to prevent shot blasting particles from entering cooling hole；For having
The part of cooling hole, maximum blasting pressure are 30p.s.i., while must be equipped with pressurized tank, for the part without cooling hole,
Maximum blasting pressure is 40p.s.i..The desanding processing are as follows: if part progress is dry blasting processing, use compressed air
Remove the sand grains of piece surface；If what part carried out is wet shot processing, use cold water wash part, then with high pressure water or
Person's high pressure gas is rinsed.
In accordance with the present invention it is preferred that before immersing the removal liquid, by the non-coating area paraffin cover of part
Reason.The paraffin that the paraffin is No. 60-64.
In the present invention, the paraffin masking processing is preferably sheltered according to the regulation in " engine handbook ".
In accordance with the present invention it is preferred that the heating temperature is 40-60 DEG C, the soaking time is 1-4h, further preferably
For 1-2h.
In the present invention, preferably, when the material of part is nickel base superalloy, the temperature of heating is 40-60
℃；The nickel base superalloy include: MarM002, MarM247, NIMONIC75, INCO738, DD5, DD32, DD26 and
C1023。
In accordance with the present invention it is preferred that the application method further includes step (2): to zero taken out from the removal liquid
Part is successively cleaned, is dried, sandblasting and desanding are handled.
Preferably, the cleaning is to be removed loosely while washing using high pressure water with hairbrush scrub
Then part is immersed in the water cleaning by sundries, when piece surface does not have wax covering, part is immersed in 80 DEG C or more of water,
When piece surface has wax covering, part is immersed in 50 DEG C of water below.The sandblasting is dry spray or wet shot；The desanding
Processing are as follows: when part carry out be dry spray when, then the sand grains of piece surface is removed with compressed air；What it is when part progress is wet shot
When, if piece surface does not have wax covering, part is immersed in 80 DEG C or more of water and cleaned, then with dry air
It is dried, if piece surface has wax covering, part is immersed in 50 DEG C of water below and is cleaned, then with drying
Air is dried.
In accordance with the present invention it is preferred that the application method further includes step (3): to zero be removed after coating treatment
Part carries out hot tinting quality inspection processing.
In accordance with the present invention it is preferred that the hot tinting quality inspection processing is heated for part to be put into Muffle furnace,
Heating temperature is 595-705 DEG C.
The present invention is further illustrated by the following examples:
Embodiment 1
The present embodiment provides a kind of removal liquid of metal surface coat of aluminide, to remove the total weight of liquid, the removal
Liquid include: nitric acid 22wt%, iron chloride 2wt%, sulfamic acid 22wt%, copper sulphate 2wt%, surplus be water.
Specific preparation method is the water of volume half needed for being added first in slot, is then slowly added into calculation amount
Nitric acid, iron chloride, sulfamic acid, copper sulphate and water, and being stirred continuously is uniformly mixed it, obtains removal liquid.
The part substrate of coating to be removed is DD5 single crystal super alloy, and surface coats coat of aluminide.
When specific works: determining piece surface with the presence or absence of coat of aluminide first with hot tinting method: removal part
Surface and oil contaminant, then dry blasting processing, by dry blasting, treated that part is put into thermal cycle furnace at 600 DEG C is kept for 40 minutes,
It takes out part cooling and checks, piece surface shows in golden yellow with the presence of coating (as shown in Figure 1)；
Then be removed the pre-treatment of aluminum oxide coating layer: the part that will test is degreased again, dry blasting is handled,
The shot blasting particles of piece surface are removed using clean compressed air；
It removes aluminum oxide coating layer: part after cooling is used into paraffin (No. 60-64) the non-coating area of masking；It is applied in removal
Before layer, it is ensured that part is dry, and temperature is 40 DEG C or less；Then part is immersed into removal liquid, at 55 DEG C, heating leaching
Steep 1.5h；
The part taken out from removal liquid is successively cleaned, is dried, sandblasting and desanding processing；Wherein, the cleaning
While to be washed using high pressure water, loose sundries is removed with hairbrush scrub, part is then immersed in the water cleaning, it will
Part immerses in 40 DEG C of water；The sandblasting is dry spray；The desanding processing are as follows: the sand of piece surface is removed with compressed air
Grain；
Hot tinting quality inspection processing is carried out to the part after coating treatment is removed, and the hot tinting quality inspection processing is by zero
Part, which is put into Muffle furnace, to be heated, and heating temperature is 620 DEG C；It is found after being handled by hot tinting quality inspection, piece surface
For blue (as shown in Figure 2), i.e. proof coat of aluminide is all removed；Do not find that excessive erosion exists in piece surface simultaneously.
Embodiment 2
The present embodiment provides a kind of removal liquid of metal surface coat of aluminide, to remove the total weight of liquid, the removal
Liquid include: nitric acid 27wt%, sulfamic acid 27wt%, surplus be water.
Specific preparation method is the water of volume half needed for being added first in slot, is then slowly added into calculation amount
Nitric acid, sulfamic acid and water, and being stirred continuously is uniformly mixed it, obtains removal liquid.
The part substrate of coating to be removed is MarM247 high temperature alloy, and surface coats coat of aluminide.
When specific works: determining piece surface with the presence or absence of coat of aluminide first with hot tinting method: removal part
Surface and oil contaminant, then dry blasting processing, by dry blasting, treated that part is put into thermal cycle furnace at 600 DEG C is kept for 40 minutes,
It takes out part cooling and checks, piece surface shows in gold with the presence of coating；
Then be removed the pre-treatment of aluminum oxide coating layer: the part that will test is degreased again, dry blasting is handled,
The shot blasting particles of piece surface are removed using clean compressed air；
It removes aluminum oxide coating layer: part after cooling is used into paraffin (No. 60-64) the non-coating area of masking；It is applied in removal
Before layer, it is ensured that part is dry, and temperature is 40 DEG C or less；Then part is immersed into removal liquid, at 60 DEG C, heating leaching
Steep 1h；
The part taken out from removal liquid is successively cleaned, is dried, sandblasting and desanding processing；Wherein, the cleaning
While to be washed using high pressure water, loose sundries is removed with hairbrush scrub, part is then immersed in the water cleaning, it will
Part immerses in 40 DEG C of water；The sandblasting is dry spray；The desanding processing are as follows: the sand of piece surface is removed with compressed air
Grain；
Hot tinting quality inspection processing is carried out to the part after coating treatment is removed, and the hot tinting quality inspection processing is by zero
Part, which is put into Muffle furnace, to be heated, and heating temperature is 690 DEG C；It is found after being handled by hot tinting quality inspection, piece surface
For blue, i.e. proof coat of aluminide is all removed；Do not find that excessive erosion exists in piece surface simultaneously.
Test case
Using the removal liquid parts processed of embodiment 2, to remove the coat of aluminide of piece surface, by observing parts list
The metallographic effect before and after the processing in face, to verify piece surface with the presence or absence of coat of aluminide.
As shown in Figure 3a, Fig. 3 a is that the metallographic for the piece surface that unused removal liquid impregnates detects photo, can from figure
Out, there are apparent coat of aluminide for piece surface；
As shown in Figure 3b, Fig. 3 b is the metallographic detection photo that the piece surface of 30min is impregnated in removal liquid, can from figure
To find out, part coat of aluminide is had been removed；
As shown in Figure 3c, Fig. 3 c is the metallographic detection photo that the piece surface of 60min is impregnated in removal liquid, from metallographic microscope
The presence for not seeing coat of aluminide in piece illustrates that the coat of aluminide of piece surface has been completely removed, illustrates the present invention
Removal liquid have good coat of aluminide removal effect.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.
Claims (10)
1. a kind of removal liquid of metal surface coat of aluminide, which is characterized in that remove the total weight of liquid, the removal liquid packet
Include: nitric acid 8-32wt%, iron chloride 0-7wt%, sulfamic acid 8-32wt%, copper sulphate 0-5wt%, surplus are water.
2. the removal liquid of metal surface coat of aluminide described in claim 1, wherein described to remove the total weight of liquid
Removal liquid includes: that nitric acid 8-32wt%, iron chloride 1-7wt%, sulfamic acid 8-32wt%, copper sulphate 1-5wt%, surplus are
Water.
3. the preparation method of the removal liquid of metal surface coat of aluminide of any of claims 1 or 2, which is characterized in that the system
Preparation Method includes: to be uniformly mixed nitric acid, sulfamic acid, water and optional copper sulphate and iron chloride, obtains the removal liquid.
4. preparation method according to claim 3, wherein the preparation method includes: that the water of half water is put into slot,
It is then slowly added into nitric acid, sulfamic acid, remaining water and optional iron chloride and copper sulphate, is uniformly mixed, is obtained described
Remove liquid.
5. the application method of the removal liquid of metal surface coat of aluminide of any of claims 1 or 2, which is characterized in that this is answered
It include: to immerse part in the removal liquid with method, heating is impregnated.
6. application method according to claim 5, wherein before immersing the removal liquid, by the non-coating area of part
It is handled with paraffin masking.
7. application method according to claim 5, wherein the heating temperature is 40-60 DEG C, and the soaking time is 1-
4h。
8. application method according to claim 5, wherein the application method further includes step (2): to from the removal
The part taken out in liquid is successively cleaned, is dried, sandblasting and desanding are handled.
9. application method according to claim 5, wherein the application method further includes step (3): being applied to being removed
Layer treated part carries out hot tinting quality inspection processing.
10. application method according to claim 9, wherein the hot tinting quality inspection processing is that part is put into Muffle furnace
In heated, heating temperature be 595-705 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898551.2A CN109023391A (en) | 2018-08-08 | 2018-08-08 | The removal liquid of metal surface coat of aluminide and its preparation method and application method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810898551.2A CN109023391A (en) | 2018-08-08 | 2018-08-08 | The removal liquid of metal surface coat of aluminide and its preparation method and application method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05179354A (en) * | 1991-06-10 | 1993-07-20 | Nippon Steel Corp | Production of grain-oriented silicon steel sheet having mirror finished surface |
| CN1368563A (en) * | 2000-02-16 | 2002-09-11 | 阿托泰克德国有限公司 | Composition for removing aluminium surface stain |
| CN103132092A (en) * | 2011-11-25 | 2013-06-05 | 孔龙 | Composition of aluminum surface polishing agent |
| CN107620079A (en) * | 2016-07-14 | 2018-01-23 | 沈阳黎明国际动力工业有限公司 | A kind of castor tooth surface aluminum oxide coating layer removes liquid and its application process |
-
2018
- 2018-08-08 CN CN201810898551.2A patent/CN109023391A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05179354A (en) * | 1991-06-10 | 1993-07-20 | Nippon Steel Corp | Production of grain-oriented silicon steel sheet having mirror finished surface |
| CN1368563A (en) * | 2000-02-16 | 2002-09-11 | 阿托泰克德国有限公司 | Composition for removing aluminium surface stain |
| CN103132092A (en) * | 2011-11-25 | 2013-06-05 | 孔龙 | Composition of aluminum surface polishing agent |
| CN107620079A (en) * | 2016-07-14 | 2018-01-23 | 沈阳黎明国际动力工业有限公司 | A kind of castor tooth surface aluminum oxide coating layer removes liquid and its application process |
Non-Patent Citations (1)
| Title |
|---|
| 何利民著: "《高温防护涂层技术》", 28 February 2012 * |
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Application publication date: 20181218 |