CN112376065A - Device for corrosion thinning or pickling of thin-walled pipe - Google Patents
Device for corrosion thinning or pickling of thin-walled pipe Download PDFInfo
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- CN112376065A CN112376065A CN202011370696.9A CN202011370696A CN112376065A CN 112376065 A CN112376065 A CN 112376065A CN 202011370696 A CN202011370696 A CN 202011370696A CN 112376065 A CN112376065 A CN 112376065A
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- 230000007797 corrosion Effects 0.000 title claims abstract description 124
- 238000005260 corrosion Methods 0.000 title claims abstract description 124
- 238000005554 pickling Methods 0.000 title claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 71
- 239000000463 material Substances 0.000 claims description 19
- 238000005530 etching Methods 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000002253 acid Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000956 alloy Substances 0.000 description 17
- 229910045601 alloy Inorganic materials 0.000 description 17
- 238000000034 method Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229910052726 zirconium Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910000883 Ti6Al4V Inorganic materials 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/08—Apparatus, e.g. for photomechanical printing surfaces
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
A device for thin-wall pipe corrosion thinning or acid pickling is composed of a corrosion container, a sealing element, a thin-wall pipe sample and a corrosion solution; the corrosion container consists of a fixed plate, a bottom plate, a movable baffle plate and a top cover, wherein the fixed plate is provided with a chute, the movable baffle plate is provided with a slide block matched with the chute, and the length of the thinned pre-corrosion section of the thin-walled tube is adjusted by moving the position of the movable baffle plate in the chute; the sealing elements are of hollow tubular structures, the wall thickness of the sealing elements can be selectively adjusted to adapt to thin-walled pipe samples with different outer diameters, and the distance between the two sealing elements is the length of the thinned pre-etched section of the thin-walled pipe sample; and after the corrosion container, the sealing piece and the thin-wall pipe sample are combined together, a corrosion solution is contained in the corrosion container. The invention has the advantages of simple structure, multiple functions, easy operation, low cost, wide application range and the like, and the technical scheme is standard and reasonable, has excellent technical effect and has expectable great economic value and social value.
Description
Technical Field
The invention belongs to the technical field of metal material corrosion and processing, relates to a technology for corrosion thinning or pickling processing of a metal material, and particularly provides a device for corrosion thinning or pickling of a thin-walled tube.
Background
The pipe industry is closely related to social production and people's life, and metal structural parts made of metal pipes have the advantages of good rigidity, high strength, light weight, low manufacturing cost and the like, and at present, the metal pipes are widely applied to pipeline systems and core parts thereof in various industries such as buildings, foods, petroleum, chemical industry, nuclear power, aviation and the like. The most used pipes in various industries include metal pipes such as steel pipes, copper pipes, aluminum pipes, titanium pipes, zirconium pipes, and the like. The metal pipe needs to bear static load and dynamic load when in work, and the working condition is more complex in a special working environment. Therefore, the processing technology of the metal pipe before service is very important.
The metal thin-wall pipe is mainly prepared by a cold rolling process, an internal circular pipe is hollow, and the pipe wall is thin. The wall thickness of the finished pipe is small, and the two ends are difficult to clamp, so that the finished pipe cannot be machined like a solid rod-shaped material and a pipe blank material with a large wall thickness, otherwise, stress concentration is easily generated on the thin-wall pipe, the thin-wall pipe is bent or machined unevenly, even the pipe is damaged, and the axial and circumferential mechanical properties of the thin-wall pipe are influenced.
However, the thin-walled tube is affected by the self thin wall and the limitation of machining, so that the arc-shaped groove is not easy to be machined under the condition of no stress, so that the mechanical property test sample which is the same as the rod-shaped tube blank material with large wall thickness cannot be machined, and if the mechanical test of the thin-walled tube is directly carried out, the fracture part is indefinite and is easy to fracture at the clamping end, so that the mechanical property test tests such as tensile test, fatigue test and the like are difficult to develop. In addition, the thin-wall pipe inevitably needs to be subjected to an acid washing process in the processing or application process, wherein the conditions of insufficient acid washing area or uneven acid washing corrosion can be met, and protective measures are also needed to prevent the inner surface of the pipe from being corroded. The acid washing or corrosion process of the thin-wall pipe with special structure or special requirement becomes more difficult, and the commonly used corrosion device and method are difficult to meet the condition.
At present, no device and technical scheme for effectively realizing corrosion thinning and acid pickling processing of thin-walled pipes so as to be convenient to use under various conditions exist for centering and thin-walled metal pipes.
Disclosure of Invention
The invention aims to provide a device which has excellent technical effect and is suitable for corrosion thinning or pickling of thin-walled tubes, so as to well solve the defects in the prior art, not only can be used for pickling processing of thin-walled tubes (common thin-walled straight tubes, thin-walled tubes which only need to be corroded to be thinned for partial length, thin-walled tubes with complex shapes and structures and the like), but also can realize mechanical property test tests of stretching, fatigue and the like of the thin-walled tubes. The device has the advantages of simple structure, easy operation, low cost, wide application range, uniform corrosion and adjustable length of the pre-corrosion section.
The invention provides a device for thin-walled tube corrosion thinning or acid pickling, which is specially used for a method for thin-walled tube corrosion thinning, and is characterized in that the device consists of a corrosion container 1, a sealing element 2, a thin-walled tube sample 3 and a corrosion solution 4, wherein:
the corrosion container 1 consists of a fixed plate 1a, a bottom plate 1b, a movable baffle plate 1c and a top cover 1d, and the whole appearance is of a cuboid structure; the fixing plate 1a is composed of two rectangular parallelepiped plates, wherein each rectangular parallelepiped plate is provided with two sliding chutes; the bottom plate 1b is a rectangular parallelepiped plate; the movable baffle 1c is composed of two rectangular parallelepiped plates, wherein four sliders are arranged at two ends of each rectangular parallelepiped plate in the width direction, and the sizes of the sliders are matched with the size of the sliding groove of the fixing plate 1a, namely L6×L7(as shown in FIG. 1) so that it can be inserted into the sliding groove of the fixed plate 1a, the position of the movable baffle plate 1c in the etching container 1 is adjustable, and a diameter L is arranged in the middle of each rectangular plate of the movable baffle plate 1c10So that it can accommodate deepA seal 2 entering the flapper 1 c; the top cover 1d is a rectangular plate;
the sealing element 2 is a functional sealing sleeve with sealing function and is in a hollow tubular structure, wherein the outer diameter size of the sealing element is matched with the size of a circular through hole of the movable baffle plate 1c, namely L10So that it can penetrate into the movable baffle 1c, and the inner diameter size is matched with the outer diameter size of the thin-wall pipe sample 3, namely L13So that it can receive a thin-walled tube sample 3 which passes through the through-opening of the sealing element 2 and penetrates into the corrosion container 1, i.e. the wall thickness L of the sealing element 2 can be selectively adjusted10-L13The device is suitable for thin-wall pipe samples 3 with different outer diameters, and the distance between the two sealing elements 2 is the length L of the thinned pre-etched section of the thin-wall pipe sample15；
After the corrosion container 1, the sealing element 2 and the thin-wall pipe sample 3 are combined together, a corrosion solution 4 is contained in the corrosion container 1.
As a preferred technical scheme:
the fixed plate 1a, the bottom plate 1b, the movable baffle plate 1c and the top cover 1d are made of the same material.
The length L of the sealing element 211Not less than the thickness L of the movable baffle 1c9；
The sliding chute of the fixed plate 1a and the sliding block of the movable baffle plate 1c are combined and fixed in position, and then a certain sealing effect is achieved, so that the corrosion solution 4 is prevented from overflowing.
The length L of the pre-etched part of the thin-wall pipe sample 315Not more than the maximum length L of the etching container 1 capable of containing etching solution1-2L9Outer diameter L of the pre-etched portion13Is not more than the diameter L of the circular through hole of the movable baffle plate 1c10。
The height of the liquid level of the etching solution 4 is not less than the maximum height L of the thin-wall pipe sample 3 in the etching container 116。
The corrosive solution 4 needs to be a special corrosive solution for the thin-wall pipe sample 3 and does not react with the corrosion container 1 and the sealing element 2.
3 tube wall thicknesses L of thin-walled tube samples13-L14And should be no greater than 5 mm.
The roughness of each contact surface of the corrosion container 1 is better than 3.2 um.
The device has wide application range, including but not limited to steel pipes, copper pipes, aluminum pipes, titanium pipes and zirconium pipes.
The device is suitable for thin-wall pipe corrosion thinning, and the thin-wall pipe corrosion thinning method meets the following specific operation requirements:
firstly, a bottom plate 1b of an etching container 1 is horizontally placed, two fixed plates 1a are placed on the bottom plate 1b and fixed, then a movable baffle plate 1c is arranged between the two fixed plates 1a, and the position of the movable baffle plate 1c in a sliding chute can be moved so as to adjust the length L of a pre-etching section thinned by a thin-walled pipe15；
Secondly, the sealing parts 2 are sleeved on the thin-wall pipe sample 3, the distance between the two sealing parts 2 on the thin-wall pipe sample 3 needs to be adjusted, and the distance between the two sealing parts 2 is the length L of the thinned pre-etched section of the thin-wall pipe15Then, the assembly of the thin-wall pipe sample 3 and the two sealing elements 2 is installed in the circular through hole of the movable baffle 1c, if the shape or the structure of the thin-wall pipe sample 3 to be corroded is complex, the assembly of the thin-wall pipe sample 3 and the two sealing elements 2 can be installed after one movable baffle 1c is installed, and then the other movable baffle 1c is installed; after the slide block of the movable baffle plate 1c and the slide groove of the fixed plate 1a are combined and fixed in position, a certain sealing effect is achieved, so that the added corrosive solution 4 is prevented from overflowing;
finally, after the assembly of the fixed plate 1a, the bottom plate 1b, the movable baffle plate 1c, the thin-walled tube sample 3 and the sealing element 2 of the corrosion container 1 is installed, the appearance of the whole corrosion container 1 is kept as a cuboid structure, the corrosion container 1 is in a window-shaped structure when viewed from above, then the corrosion solution 4 is added into the corrosion container 1, and the liquid level height of the corrosion solution is not less than the maximum height L of the thin-walled tube sample 3 in the corrosion container 116。
The device solves the problems of insufficient pickling area or uneven pickling corrosion of the thin-walled tube, and also solves the problems of complex tensile and fatigue mechanical property test samples, difficult processing and easy stress introduction in the thin-walled tube preparation, and can be used for pickling processing of the thin-walled tube and preparation of tensile and fatigue mechanical property test samples. The invention can fill the gap of the prior art, has the advantages of simple structure, multiple functions, easy operation, low cost, wide applicability and the like, has standard and reasonable technical scheme and excellent technical effect, and has expectable great economic value and social value.
Drawings
FIG. 1 is a three-dimensional view of the corrosion vessel (without the top cap), seal and thin-walled tubing sample in the apparatus of the present invention after assembly;
FIG. 2 is a cross-sectional view taken along plane A-A of the apparatus of the present invention;
FIG. 3 is a three-dimensional view of the corrosion vessel of the apparatus of the present invention;
FIG. 4 is a cross-sectional view of a plastic sealant boot of the present invention;
FIG. 5 is a graph showing the relationship between the diameter of a Zr-4 alloy thin-walled tube sample and the corrosion time in example 2;
FIG. 6 is a graph showing the relationship between the reduction of the wall thickness of a Zr-4 alloy thin-walled tube sample and the corrosion time in example 2;
reference numerals: 1. the device comprises a corrosion container, 2, a sealing element, 3, a thin-wall pipe sample, 1a, a fixing plate, 1b, a bottom plate, 1c, a movable baffle, 1d and a top cover.
Detailed Description
Example 1
A device for thin-wall pipe corrosion thinning is specially used for a method for thin-wall pipe corrosion thinning or acid pickling, and can be seen by combining figures 1 to 4, the device consists of a corrosion container 1, a sealing element 2, a thin-wall pipe sample 3 and a corrosion solution 4, wherein:
the sealing element 2 is of a hollow tubular structure, the size of the outer diameter of the sealing element is matched with the size of a circular through hole of the movable baffle 1c, so that the sealing element can penetrate into the movable baffle 1c, the size of the inner diameter of the sealing element is matched with the size of the outer diameter of a thin-wall pipe sample 3, so that the sealing element can accommodate the thin-wall pipe sample 3 which passes through the through hole of the sealing element 2 and penetrates into the corrosion container 1, the thin-wall pipe samples 3 with different outer diameters can be adapted by selectively adjusting the wall thickness of the sealing element 2, and the distance between the two sealing elements 2 is the length of a pre-;
after the corrosion container 1, the sealing element 2 and the thin-wall pipe sample 3 are combined together, a corrosion solution 4 is contained in the corrosion container 1.
The fixed plate 1a, the bottom plate 1b, the movable baffle plate 1c and the top cover 1d are made of the same material.
The length of the sealing member 2 is not less than the thickness of the movable baffle plate 1c of the corrosion container 1.
The sliding chute of the fixed plate 1a and the sliding block of the movable baffle plate 1c are combined and fixed in position, and then a certain sealing effect is achieved, so that the corrosion solution 4 is prevented from overflowing.
The length of the pre-corrosion part of the thin-wall pipe sample 3 is not more than the maximum length of the corrosion container 1 capable of containing corrosion solution, and the outer diameter of the pre-corrosion part is not more than the diameter of the circular through hole of the movable baffle 1 c.
The height of the liquid level of the etching solution 4 is not less than the maximum height of the thin-wall pipe sample 3 in the etching container 1.
The corrosive solution 4 is special for the thin-wall pipe sample 3 and does not react with the corrosion container 1 and the sealing element 2.
The thickness of the pipe wall of the thin-wall pipe sample 3 is not more than 5 mm.
The roughness of each contact surface of the corrosion container 1 is better than 3.2 um.
The device is suitable for thin-wall pipe corrosion thinning, and the thin-wall pipe corrosion thinning method meets the following specific operation requirements:
firstly, horizontally placing a bottom plate 1b of a corrosion container 1, placing two fixed plates 1a on the bottom plate 1b, fixing, then installing a movable baffle plate 1c between the two fixed plates 1a, wherein the position of the movable baffle plate 1c in a chute can be moved so as to adjust the thinned pre-corrosion section length of the thin-walled tube;
secondly, the sealing piece 2 with the sealing function is sleeved on the thin-wall pipe sample 3, the distance between the two sealing pieces 2 on the thin-wall pipe sample 3 needs to be adjusted at the moment, the distance between the two sealing pieces 2 is the thinned pre-etched section length of the thin-wall pipe, then the combined piece of the thin-wall pipe sample 3 and the two sealing pieces 2 is installed in the circular through hole of the movable baffle 1c, if the shape or the structure of the thin-wall pipe sample 3 to be etched is complex, the combined piece of the thin-wall pipe sample 3 and the two sealing pieces 2 can be installed firstly after one movable baffle 1c is installed, and then the other movable baffle 1c is installed; after the slide block of the movable baffle plate 1c and the slide groove of the fixed plate 1a are combined and fixed in position, a certain sealing effect is achieved, so that the added corrosive solution 4 is prevented from overflowing;
finally, after the assembly of the fixed plate 1a, the bottom plate 1b, the movable baffle plate 1c, the thin-wall pipe sample 3 and the sealing element 2 of the corrosion container 1 is installed, the appearance of the whole corrosion container is kept to be a cuboid structure, the corrosion container 1 is in a window-shaped structure when viewed from above, then the corrosion solution 4 is added into the corrosion container 1, and the liquid level height of the corrosion solution is not less than the maximum height of the thin-wall pipe sample 3 in the corrosion container 1.
Example 2
Example 2 is specifically developed and implemented on the device described in example 1, and is applied to research on the relation between the corrosion thinning rate and the corrosion time of the Zr-4 alloy thin-walled tube.
The nominal component of the Zr-4 alloy is Zr-1.2Sn-0.2Fe-0.1Cr, the alloy has very low thermal neutron absorption cross section, good mechanical property and excellent corrosion resistance, and the Zr-4 alloy is a cladding material used by fuel elements in most of pressurized water reactors in China at present.
The tube material used in this embodiment is a Zr-4 alloy thin-walled tube, the outer diameter and the wall thickness of which are Φ 6.00 × δ 0.54mm, the original length of which is 100.0mm, and the pre-etched section is in the middle of the thin-walled tube and has a length of 56.0 mm.
The device corrodes fixed plate 1a, bottom plate 1b, adjustable fender 1c of container 1, the material that top cap 1d and sealing member 2 used is polyvinyl chloride, whole appearance is the cuboid, its length is 150.0mm, the width is 120.0mm, the height is 100.0mm, adjustable fender 1 c's circular through-hole diameter and sealing member 2 external diameter are 16.00mm, sealing member 2 internal diameter is 6.00mm, after corroding container 1, sealing member 2 and thin wall tubular product sample 3 triplex together, the distance between two sealing member 2 is 56.0mm, thin wall tubular product sample 3 is maximum height in corroding container 1 for 45.0mm, the corrosion solution 4 that adds in the container 1 is 45 vol.% HNO3：45vol.％H2O: 10 vol.% HF with a liquid level of 52.0mm, etching was carried out by adding etching solution 4 and closing the top cap 1d, and the etching time was recorded.
After the thin-walled tube sample 3 is taken out after the corrosion thinning treatment, the thin-walled tube sample is cleaned by water flow and cleaned again by ultrasonic waves, the outer diameter of a corrosion section is measured, and the corrosion thinning amount is calculated, fig. 5 is a relation graph of the diameter of the Zr-4 alloy thin-walled tube sample researched in the embodiment and the corrosion time, and fig. 6 is a relation graph of the wall thickness reduction amount of the Zr-4 alloy thin-walled tube sample researched in the embodiment and the corrosion time.
Example 3
Example 3 is specifically developed and implemented on the device described in example 1, and is applied to preparing tensile property test samples of Zr-4 alloy thin-wall pipes.
The nominal component of the Zr-4 alloy is Zr-1.2Sn-0.2Fe-0.1Cr, the alloy has very low thermal neutron absorption cross section, good mechanical property and excellent corrosion resistance, and the Zr-4 alloy is a cladding material used by fuel elements in most of pressurized water reactors in China at present.
The tube material used in this embodiment is a Zr-4 alloy thin-walled tube, the outer diameter and the wall thickness of which are Φ 8.00 × δ 0.60mm, the original length of which is 80.0mm, and the pre-etched section is in the middle of the thin-walled tube and the length of which is 20.0 mm.
The device comprises a fixed plate 1a, a bottom plate 1b, a movable baffle plate 1c and a top cover 1d of a corrosion container 1The sealing element 2 and the used material are polyvinyl chloride, the whole appearance is a cuboid, the length is 150.0mm, the width is 120.0mm, the height is 100.0mm, the diameter of a circular through hole of the movable baffle plate 1c and the outer diameter of the sealing element 2 are 16.00mm, the inner diameter of the sealing element 2 is 8.00mm, after the corrosion container 1, the sealing element 2 and the thin-wall pipe sample 3 are combined together, the distance between the two sealing elements 2 is 20.0mm, the maximum height of the thin-wall pipe sample 3 in the corrosion container 1 is 46.0mm, and the corrosion solution 4 added into the corrosion container 1 is 45 vol.% of HNO3：45vol.％H2O: 10 vol.% HF with a liquid level of 56.0mm, and the etching solution 4 was added and the top cap 1d was closed, thereby etching was performed.
And after corrosion thinning treatment, taking out the thin-wall pipe sample 3, cleaning with water flow, cleaning again with ultrasonic waves, clamping with a special clamp after cleaning, performing a tensile test, and measuring that the tensile strength and the yield strength of the thin-wall pipe before corrosion are 572MPa and 352MPa respectively, the tensile strength and the yield strength after corrosion are 563MPa and 359MPa respectively, wherein the mechanical properties of the thin-wall pipe 1 before and after corrosion are not influenced within an error range.
Example 4
Example 4 is implemented on the device described in example 1, and is applied to the pickling and corrosion processing process of TC4 alloy thin-wall pipes.
The TC4 alloy has a nominal composition of Ti-6Al-4V, has low density, good process plasticity, high specific strength and excellent corrosion resistance, and is mainly used for manufacturing engine fans, compressor disks and blades, beams, joints, bulkheads and other components in airplanes in the aviation industry.
The tube material used in the embodiment is a TC4 alloy thin-wall tube, the outer diameter and the wall thickness of the tube material are phi 10.00 multiplied by delta 1.24mm, the original length of the tube material is 100.0mm, and the pre-corrosion section is arranged in the middle of the thin-wall tube material and has the length of 90 mm.
The device corrodes fixed plate 1a, bottom plate 1b, adjustable fender 1c of container 1, and the material that top cap 1d and sealing member 2 used is polyvinyl chloride, and whole appearance is the cuboid, and its length is 150.0mm, and the width is 120.0mm, and the height is 100.0mm, and adjustable fender 1 c's circular through-hole diameter and sealing member 2 external diameter are 16.00mm, the inner diameter of the sealing element is 10.00mm, after the three parts of the corrosion container 1, the sealing element 2 and the thin-wall pipe sample 3 are combined together, the distance between the two sealing elements 2 is 90.0mm, the maximum height of the thin-wall pipe sample 3 in the corrosion container 1 is 48.0mm, and the corrosion solution 4 added into the corrosion container 1 is 8 vol.% of HNO3：90vol.％H2O: 2 vol.% HF with a liquid level of 58.0mm, and the etching solution 4 was added and the top cap 1d was closed, thereby etching was performed.
And after the corrosion thinning treatment, taking out the thin-wall pipe sample 3, cleaning the thin-wall pipe sample with water flow, and cleaning the thin-wall pipe sample 3 again with ultrasonic waves, wherein the surface of a corrosion section of the thin-wall pipe sample 3 after acid washing is smooth, the wall thickness is uniform, and the thin-wall pipe sample can be used for the next test for standby.
The embodiment can provide a theoretical basis for optimizing the production process of the zirconium thin-wall pipe, provide technical support for the design and the implementation of subsequent experiments, can calculate the physical properties of the material by combining a performance estimation theory, and has unique points for evaluating the overall macroscopic properties of the material.
The invention is not the best known technology.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. The utility model provides a device that is used for corrosion of thin wall tubular product to attenuate or pickling, characterized in that, the device comprises corruption container (1), sealing member (2), thin wall tubular product sample (3) and corrosive solution (4), wherein:
the corrosion container (1) consists of a fixed plate (1a), a bottom plate (1b), a movable baffle (1c) and a top cover (1d), and the whole appearance is of a cuboid structure; the fixing plate (1a) consists of two rectangular plate bodies, wherein each rectangular plate body is provided with two sliding grooves; the bottom plate (1b) and the top cover (1d) are both rectangular plates; the movable baffle (1c) consists of two cuboid plates, wherein two ends of each cuboid plate are provided with four sliding blocks along the width direction, the size of each sliding block is matched with that of the sliding chute of the fixed plate (1a) so as to be capable of penetrating into the sliding chute of the fixed plate (1a), the position of the movable baffle (1c) in the corrosion container (1) is adjustable, and the middle of each cuboid plate of the movable baffle (1c) is provided with a circular through hole;
the sealing element (2) is of a hollow tubular structure, the size of the outer diameter of the sealing element is matched with the size of the circular through hole of the movable baffle (1c) so that the sealing element can penetrate into the movable baffle (1c), the size of the inner diameter of the sealing element is matched with the size of the outer diameter of the thin-wall pipe sample (3), and the sealing element is suitable for the thin-wall pipe samples (3) with different outer diameters by selectively adjusting the wall thickness of the sealing element (2);
after the corrosion container (1), the sealing element (2) and the thin-wall pipe sample (3) are combined together, corrosive solution (4) is contained in the corrosion container (1).
2. The apparatus for corrosion thinning or pickling of thin-walled tubing according to claim 1, wherein: the fixed plate (1a), the bottom plate (1b), the movable baffle (1c) and the top cover (1d) are made of the same material.
3. The apparatus for corrosion thinning or pickling of thin-walled tubing according to claim 1, wherein: the length of the sealing element (2) is not less than the thickness of the movable baffle (1 c).
4. The apparatus for corrosion thinning or pickling of thin-walled tubing according to claim 1, wherein: the length of the pre-corrosion part of the thin-wall pipe sample (3) is not more than the maximum length of a corrosion container (1) capable of containing a corrosion solution, and the outer diameter of the pre-corrosion part is not more than the diameter of a circular through hole of a movable baffle (1c) of the corrosion container (1).
5. The apparatus for corrosion thinning or pickling of thin-walled tubing according to claim 1, wherein: the height of the liquid level of the corrosion solution (4) of the device is not less than the maximum height of the thin-wall pipe sample (3) in the corrosion container (1).
6. The apparatus for corrosion thinning or pickling of thin-walled tubing according to claim 1, wherein: the device is such that the etching vessel (1) and the seal (2) do not react with the etching solution (4).
7. The apparatus for corrosion thinning or pickling of thin-walled tubing according to claim 1, wherein: the thickness of the pipe wall of the thin-wall pipe sample (3) is not more than 5 mm.
8. The apparatus for corrosion thinning or pickling of thin-walled tubing according to claim 1, wherein: the roughness of each contact surface of the corrosion container (1) is better than 3.2 um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011370696.9A CN112376065A (en) | 2020-11-30 | 2020-11-30 | Device for corrosion thinning or pickling of thin-walled pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011370696.9A CN112376065A (en) | 2020-11-30 | 2020-11-30 | Device for corrosion thinning or pickling of thin-walled pipe |
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| Publication Number | Publication Date |
|---|---|
| CN112376065A true CN112376065A (en) | 2021-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011370696.9A Pending CN112376065A (en) | 2020-11-30 | 2020-11-30 | Device for corrosion thinning or pickling of thin-walled pipe |
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| Country | Link |
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| CN (1) | CN112376065A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4233108A (en) * | 1974-10-05 | 1980-11-11 | Kobe Steel, Limited | Process for use in etching the outer surface of a metal member |
| CN105821432A (en) * | 2016-05-25 | 2016-08-03 | 江苏省冶金设计院有限公司 | Method for pickling inner and outer surfaces of pipe |
| CN215103581U (en) * | 2020-11-30 | 2021-12-10 | 中国科学院金属研究所 | Device for corrosion thinning or pickling of thin-walled pipe |
-
2020
- 2020-11-30 CN CN202011370696.9A patent/CN112376065A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4233108A (en) * | 1974-10-05 | 1980-11-11 | Kobe Steel, Limited | Process for use in etching the outer surface of a metal member |
| CN105821432A (en) * | 2016-05-25 | 2016-08-03 | 江苏省冶金设计院有限公司 | Method for pickling inner and outer surfaces of pipe |
| CN215103581U (en) * | 2020-11-30 | 2021-12-10 | 中国科学院金属研究所 | Device for corrosion thinning or pickling of thin-walled pipe |
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