CN109342309B - Test device and test method for simulating marine corrosion environment - Google Patents
Test device and test method for simulating marine corrosion environment Download PDFInfo
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- CN109342309B CN109342309B CN201811414974.9A CN201811414974A CN109342309B CN 109342309 B CN109342309 B CN 109342309B CN 201811414974 A CN201811414974 A CN 201811414974A CN 109342309 B CN109342309 B CN 109342309B
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- 238000012360 testing method Methods 0.000 title claims abstract description 95
- 238000005260 corrosion Methods 0.000 title claims abstract description 68
- 230000007797 corrosion Effects 0.000 title claims abstract description 67
- 238000010998 test method Methods 0.000 title claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 238000007654 immersion Methods 0.000 claims abstract description 11
- 239000013535 sea water Substances 0.000 claims description 29
- 229910045601 alloy Inorganic materials 0.000 claims description 18
- 239000000956 alloy Substances 0.000 claims description 18
- 238000003723 Smelting Methods 0.000 claims description 13
- 230000006698 induction Effects 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 6
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- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000008358 core component Substances 0.000 claims description 5
- 238000001931 thermography Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 238000010892 electric spark Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
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- 229910052752 metalloid Inorganic materials 0.000 claims description 3
- 150000002738 metalloids Chemical class 0.000 claims description 3
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- 238000007712 rapid solidification Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
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Abstract
The invention relates to a test device and a test method for simulating marine corrosion environment. The device comprises a corrosion test groove, a wave-making plate, a wave-making device, a lifting device, a temperature control device, an inclined overturning device and an inclined driving device; the inner wall of the corrosion test groove is coated with an Fe-based amorphous coating, and the wave-making plate and the inclined overturning device are positioned in the corrosion test groove; the tilting and overturning device is fixed on the lifting device, the lifting device drives the tilting and overturning device to lift, the tilting and overturning device is connected with the tilting and overturning driving device, and the tilting and overturning driving device drives the tilting and overturning device to tilt and overturn; the wave-making plate is connected with the wave-making device, and the wave-making device drives the wave-making plate to move along a rectangular track. The invention simulates the marine environment more truly and accurately, has low energy consumption, and the wave waveform produced is stable and uniform, realizes the corrosion state of the test piece of full immersion, half immersion or alternation of dry and wet, adopts the Fe-based amorphous coating, and effectively prolongs the service life of the device.
Description
Technical Field
The invention relates to the technical field of researching corrosion of steel materials in marine environments, in particular to a test device and a test method for simulating marine corrosion environments.
Background
The marine environment is complex and has a plurality of uncertainties, and is one of the worst environments for material corrosion. Since marine equipment needs to work in a marine environment for a long time, corrosion protection of steel for marine engineering generally adopts methods of paint spraying, organic coating, electrochemical protection and the like, but some fine defects which cannot be overcome still can cause local corrosion of the surface of the marine equipment over time. Marine corrosion severely limits the operational life of marine equipment, bringing significant economic losses to the country. In order to shorten the marine corrosion test period, a corrosion test under laboratory conditions is generally adopted to calculate the real marine corrosion behavior of the experimental steel, but a simulation experiment can simplify a plurality of parameters, such as sea wave impact, sea water temperature change rate and the like, so that the simulation accuracy can be affected to a certain extent. It is therefore necessary to explore devices and processes for simulating real marine corrosion behavior and corrosion mechanisms.
At present, the existing devices and processes for partially simulating marine environment corrosion in China are mainly used for simulating waves by using wave generators such as rocking plates, piston type, pushing plates and the like, the manufactured waves are easily interfered by the return stroke of the wave generator, and the wave forms are not quantitatively controlled and are convenient to record; the existing test device and the existing test process adopt fixed hanging pieces, have single variable, and can not simulate the impact of seawater on different angles and different parts of marine facilities; the existing test device and the existing test process can only simulate a single corrosion state, but cannot simulate all-immersion, half-immersion or dry-wet alternating multiple corrosion states; the material used by the existing test device cannot avoid the corrosion influence of the corrosive liquid on the material, so that the service life of the device is greatly shortened.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the test device and the test method for simulating the marine corrosion environment, which have the advantages of low energy consumption and long service life and can accurately simulate the marine corrosion environment.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
a test device for simulating marine corrosion environment comprises a corrosion test groove, a wave-making plate, a wave-making device, a lifting device, a temperature control device, an inclination overturning device and an inclination driving device; the inner wall of the corrosion test groove is coated with an Fe-based amorphous coating, and the wave-making plate and the inclined overturning device are positioned in the corrosion test groove; the tilting and overturning device is fixed on the lifting device, the lifting device drives the tilting and overturning device to lift, the tilting and overturning device is connected with the tilting and overturning driving device, and the tilting and overturning driving device drives the tilting and overturning device to tilt and overturn; the wave-making plate is connected with the wave-making device, and the wave-making device drives the wave-making plate to move along a rectangular track.
The wave generating device comprises a wave generating motor, an internal gear, an external gear and a connecting rod; the wave-making motor is connected with an internal gear which is meshed with the external gear; the connecting rod is provided with 2 bends of 90 degrees, one end of the connecting rod is connected with the internal gear, and the other end is connected with the wave-making plate.
The lifting device comprises a lifting motor, a gear, a rack and a sliding rail; the rack is arranged on the slide rail, the rack is meshed with the gear, the lifting motor is connected with the gear, and the lifting motor drives the gear to rotate so as to drive the rack to lift up and down along the slide rail.
The tilting and overturning device comprises an objective table, a universal ball joint and a carrier; the objective table is fixed on the lifting device, and the object carrier is connected with the objective table through a universal ball joint.
The inclination driving device comprises a main hydraulic device and a sub-hydraulic device; the push rod of the main hydraulic device is positioned in the middle of the hydraulic cylinder, two ends of the push rod of the main hydraulic device are respectively connected with the piston, two ends of the hydraulic cylinder of the main hydraulic device are respectively connected with the sub-hydraulic devices through the guide pipes, and the push rod of the sub-hydraulic devices is connected with the tilting and overturning device.
A test method for simulating marine corrosion environment specifically comprises the following steps:
firstly, spraying an Fe-based amorphous coating on the inner wall of a test tank body and a core component of a test device;
step two, injecting seawater into the test tank, and adding weak acid or weak base to accelerate the corrosion speed by changing the acid-base concentration; the test piece is made of steel for ocean engineering for manufacturing actual ocean facilities;
step three, heating or cooling by a temperature control device, wherein the temperature of the seawater can be controlled within the range of-2 ℃ to 30 ℃;
step four, starting a wave-making motor, wherein the wave-making device drives the wave-making plate to move along a preset track, so that wave with controllable and stable wave shape can be manufactured, and the real ocean environment can be simulated;
fifthly, adjusting the inclination angle of the test piece through the inclination driving device, overturning the test piece at different angles, and simulating impact of seawater on different angles and different parts of the marine facility;
step six, starting a lifting motor, wherein the rotating speed is 7.2 r/s-50 r/s, and the lifting device drives the test piece to lift, so that the complete soaking, half soaking or dry-wet alternating corrosion state of the test piece is realized, and the lifting period and the descending period are controlled to be 3-6 s;
step seven, setting the test time to be 3-72 hours, and taking out the test piece to carry out corrosion measurement after the test is finished;
step eight, performing corrosion measurement according to GB 6384-86 standard;
and step nine, carrying out infrared thermal imaging nondestructive testing on the test piece which is not subjected to corrosion treatment.
In the first step, an Fe-based amorphous coating is adopted to spray the inner wall of the test tank body and the core component of the test device, and the method specifically comprises the following steps:
1) And (3) batching: respectively weighing 143.1-144.41 g of Fe, 21.38-22.72 g of Si, 4.36-4.43 g of B, 3.61-3.77 g of P, 0.961-0.975 g of C and 3.74-3.76 g of Nb according to the atomic percentage to form 180g of raw material for preparing Fe63.5-64.5Si19.3-21B0.95-11P2.5-3.3C1.77-2.23Nb1 bulk amorphous alloy, wherein the purity of metal Fe is more than or equal to 99.8%; the purity of the metal Ta is more than or equal to 99.5 percent; the purity of the metalloid B is more than or equal to 99.5%; the purity of Ru is more than 99.5%;
2) Smelting a master alloy: putting the raw materials into a vacuum induction smelting furnace to be smelted into master alloy, wherein the smelting conditions are as follows: the vacuum degree in the vacuum induction melting furnace is more than 3.5X10-2 Pa, and the melting time is 5-10 min;
3) Placing the master alloy into an induction furnace of a rapid solidification device, regulating the induction current 15A, injecting a melt into a copper mold after the master alloy is completely melted, and cooling along with the copper mold to obtain Fe64Si 20P 10P3C2Nb1 block amorphous alloy with the diameter of 1.8-2.2 mm;
4) The alloy rod is placed in an electric spark spraying device, the voltage is 220-240V, the current is 290-310A, and the alloy rod is uniformly sprayed for 3-4 times.
Compared with the prior art, the invention has the following beneficial effects:
(1) The marine steel used for manufacturing the marine equipment in actual life is taken as a test piece material, seawater is filled in the test tank, the seawater concentration can be changed if necessary, the corrosion condition can be quickened or slowed down, the experimental time can be controlled, and the actual marine environment can be simulated; the heater is arranged at the bottom of the inner side of the test tank, solid ice is added if necessary, the temperature of the seawater is regulated, and the temperature change of the seawater is simulated; the invention simulates the ocean environment more accurately.
(2) The improved push plate type wave forming mode is adopted, the running track of the wave forming plate is rectangular, the influence of wave forming plate return stroke on waves and unnecessary power loss are effectively avoided, the wave form is stable and uniform, and the real marine environment is simulated.
(3) The test piece is overturned at different angles through the inclined overturning device and the inclined overturning driving device, and impact of seawater on different angles and different positions of the ocean facility is simulated; the test piece is driven by the lifting device, the water inlet condition can be flexibly adjusted, and the full-immersion, half-immersion or dry-wet alternate corrosion state of the test piece is realized.
(4) And the Fe-based amorphous coating is adopted to spray the inner wall of the test tank body and the core parts of the test device, so that the service life of the device is effectively prolonged.
Drawings
FIG. 1 is a schematic front view of the structure of the present invention;
FIG. 2 is a schematic top view of the structure of the present invention;
FIG. 3 is a schematic view of the tilt drive mechanism of the present invention;
fig. 4 is a schematic structural view of the tilt and tilt driving apparatus according to the present invention.
In the figure: 1-corrosion test tank 2-wave plate 3-wave making device 4-lifting device 5-temperature control device 6-tilting turnover device 7-tilting drive device 8-simulated seawater solution-wave making motor 32-internal gear 33-external gear 34-connecting rod 41-lifting motor 42-gear 43-rack 44-slide rail 61-objective table 62-universal ball joint 63-carrier 64-ball seat 65-360-degree rotating ball 66-supporting rod 71-main hydraulic device 72-sub-hydraulic device 73-push rod 74-piston 75-guide tube 76-hydraulic cylinder
Detailed Description
The following detailed description of the invention is further illustrative, but is not intended to limit the scope of the invention:
examples:
as shown in fig. 1 to 4, a test device for simulating marine corrosion environment comprises a corrosion test tank 1, a wave-making plate 2, a wave-making device 3, a lifting device 4, a temperature control device 5, a tilting and turning device 6 and a tilting driving device 7. The inner wall of the corrosion test tank 1 is coated with an Fe-based amorphous coating. The wave-making plate 2, the tilting device 6 and the temperature control device 5 are positioned in the corrosion test tank 1. The tilting device 6 is fixed on the lifting device 4, the lifting device 4 drives the tilting device 6 to lift, the tilting device 6 is connected with the tilting driving device 7, and the tilting driving device 7 drives the tilting device 6 to tilt. The wave-making plate 2 is connected with the wave-making device 3, and the wave-making device 3 drives the wave-making plate 2 to move along a rectangular track.
The wave generator 3 includes a wave generator 31, an internal gear 32, an external gear 33, and a connecting rod 34. The wave motor 31 is connected to the internal gear 32, and the internal gear 32 is meshed with the external gear 33. The connecting rod 34 is provided with 2 bends of 90 degrees, one end of the connecting rod 34 is connected with the internal gear 32, and the other end is connected with the middle part of the wave-making plate 2. The wave-making motor 31 drives the connecting rod 34 to move, and then drives the wave-making plate 2 to do reciprocating rectangular motion. The size of the waves can be adjusted by adjusting the rotation speed of the wave motor 31, and the push plate type wave generator has uniform wave generation and stable wave form.
The lifting device 4 includes a lifting motor 41, a gear 42, a rack 43, and a slide rail 44. The rack 43 is installed on the slide rail 44, and the rack 43 meshes with the gear 42, and the elevator motor 41 links to each other with the gear 42, and the elevator motor 41 drives the gear 42 rotation, and then drives rack 43 and reciprocates along slide rail 44.
The tilt-turn device 6 comprises a stage 61, a universal ball joint 62 and a carrier 63. The flat center of the carrier 63 is fixed on a ball seat 64 of the universal ball joint 62, a 360-degree rotating ball 65 is arranged below the ball seat 64, a supporting rod 66 is arranged below the 360-degree rotating ball 65, and the supporting rod 66 is fixed on the object stage 61. The stage 61 is fixed on the rack 43 of the lifting device 4, and the lifting motor 41 rotates to drive the stage 61 and the carrier 63 to lift along the slide rail 44.
The invention is provided with 2 groups of tilting drive devices 7, each group of tilting drive devices 7 comprising 1 main hydraulic device 71 and 2 sub-hydraulic devices 72. The push rod 73 of the main hydraulic device 71 is located in the middle of the hydraulic cylinder 76, two ends of the push rod 73 of the main hydraulic device 71 are respectively connected with the piston 74, two ends of the hydraulic cylinder 76 of the main hydraulic device 71 are respectively connected with the sub-hydraulic device 72 through the guide pipe 75, and the ends of the push rod 73 of the sub-hydraulic device 72 are fixed at four corners of the flat plate of the carrier 63. Pushing the push rod 73 of the main hydraulic device 71 of the tilting drive device 7, the push rod 73 of the sub-hydraulic device 72 is lengthened or shortened along with the push rod 73, and the extension or shortening of the push rod 73 of the sub-hydraulic device 72 drives the flat plate of the carrier 63 to tilt and turn around the center of the flat plate as a fulcrum.
A test method for simulating marine corrosion environment specifically comprises the following steps:
firstly, spraying an Fe-based amorphous coating on the inner wall of a test tank body and a core component of a test device; the method specifically comprises the following steps:
1) And (3) batching: respectively weighing 143.1-144.41 g of Fe, 21.38-22.72 g of Si, 4.36-4.43 g of B, 3.61-3.77 g of P, 0.961-0.975 g of C and 3.74-3.76 g of Nb according to the atomic percentage to form 180g of raw material for preparing Fe63.5-64.5Si19.3-21B0.95-11P2.5-3.3C1.77-2.23Nb1 bulk amorphous alloy, wherein the purity of metal Fe is more than or equal to 99.8%; the purity of the metal Ta is more than or equal to 99.5 percent; the purity of the metalloid B is more than or equal to 99.5%; the purity of Ru is more than 99.5%;
2) Smelting a master alloy: putting the raw materials into a vacuum induction smelting furnace to be smelted into master alloy, wherein the smelting conditions are as follows: the vacuum degree in the vacuum induction smelting furnace is more than 3.5 multiplied by 10 -2 Pa, smelting time is 5-10 min;
3) Placing the master alloy into an induction furnace of a rapid solidification device, regulating the induction current 15A, injecting a melt into a copper mold after the master alloy is completely melted, and cooling along with the copper mold to obtain Fe64Si 20P 10P3C2Nb1 block amorphous alloy with the diameter of 1.8-2.2 mm;
4) The alloy rod is placed in an electric spark spraying device, the voltage is 220-240V, the current is 290-310A, and the alloy rod is uniformly sprayed for 3-4 times.
Step two, injecting seawater into the test tank, and adding weak acid or weak base with a certain proportion to accelerate the corrosion speed to form simulated seawater solution 8; the test piece is made of steel for ocean engineering for manufacturing actual ocean facilities;
step three, heating or cooling by a temperature control device 5, wherein the temperature of the simulated seawater solution 8 can be controlled to be between-2 ℃ and 30 ℃;
step four, starting the wave-making motor 31, and driving the wave-making plate 2 to move along a preset track by the wave-making device 3 to produce waves with controllable and stable waveforms, so that the real ocean environment can be simulated;
fifthly, adjusting the inclination angle of the test piece through the inclination driving device 7, overturning the test piece at different angles, and simulating impact of seawater on different angles and different parts of the marine facility;
step six, starting the lifting motor 41, wherein the rotating speed is 7.2 r/s-50 r/s, and the lifting device 4 drives the test piece to lift, so that the complete soaking, half soaking or dry-wet alternating corrosion state of the test piece is realized, and the lifting period and the descending period are controlled to be 3-6 s;
step seven, setting the test time to be 5-10 hours, and taking out the test piece to carry out corrosion measurement after the test is finished;
step eight, performing corrosion measurement according to GB 6384-86 standard;
and step nine, carrying out infrared thermal imaging nondestructive testing on the test piece which is not subjected to corrosion treatment. The main technical parameters of the invention are shown in table 1:
TABLE 1 Main technical parameter Table
The relationship between the amplitude of the generated wave and the output rotation speed of the motor can be obtained by the following steps:
wherein:
ρ is the solution density, kg/m 3 ；
g is gravity acceleration, m/s 2 ；
x is the depth of the wave-making plate into water, and mm;
b is the width of the wave plate, mm;
k experimental coefficients;
v is the motor speed, r/s;
psi is the amplitude;
s is the stroke of the wave-making plate doing periodic motion, mm.
The formula shows that the amplitude is in direct proportion to the rotation speed of the motor, and the size of the produced waves can be adjusted by changing the rotation speed of the motor, so that the sea water motion states with different flow rates can be simulated.
Example 1:
the test piece size was 200mm. Times.100 mm. Times.5 mm, and the mass was 0.75kg. A test method for simulating marine corrosion environment specifically comprises the following steps:
1) The seawater was heated by the temperature control device 5 to control the seawater temperature to 15 ℃.
2) The wave-making motor 31 is started, the rotating speed is controlled to be 60r/min, and the movement period T of the wave-making plate 2 is controlled to be 5s.
3) Pushing the push rod 73 of the tilting drive device 7 adjusts the tilting state of the test piece to tilt vertically to the right by 30 °.
4) The corrosion condition of full immersion is selected, the lifting motor 41 is started, the rotating speed is controlled to be 40r/min, and the water penetration depth of the test piece is adjusted to be 200mm.
6) And setting the test time to be 6 hours, and taking out the test piece to carry out corrosion measurement after the test is finished.
7) Corrosion measurements were performed according to the GB 6384-86 standard;
8) And carrying out infrared thermal imaging nondestructive detection on the test piece which is not subjected to corrosion treatment.
Example 2:
the test piece size was 200mm. Times.100 mm. Times.6 mm, and the mass was 0.942kg. A test method for simulating marine corrosion environment specifically comprises the following steps:
1) The seawater was heated by a temperature control device 5 to control the temperature of the seawater to 5 ℃.
2) The wave-making motor 31 is started, the rotating speed is controlled to be 120r/min, and the movement period T of the wave-making plate 2 is 12s.
3) Pushing the push rod 73 of the tilting drive device 7 adjusts the tilting state of the test piece to tilt vertically to the right by 45 °.
4) The dry-wet alternate corrosion conditions were selected. The lifting motor 41 is started, the power is controlled at 40r/min, the water depth is set to be 200mm, and the lifting period and the descending period are controlled at 5s.
6) And setting the test time to be 4 hours, and taking out the test piece to carry out corrosion measurement after the test is finished.
7) Corrosion measurements were performed according to the GB 6384-86 standard;
8) And carrying out infrared thermal imaging nondestructive detection on the test piece which is not subjected to corrosion treatment.
According to the invention, steel for ocean engineering in actual life is used as a test piece material, seawater is filled in a test tank, the seawater concentration can be changed if necessary, the corrosion condition can be accelerated or slowed down, the experimental time can be controlled, and the actual ocean environment can be simulated; the bottom of the inner side of the test tank is provided with a temperature control device for adjusting the temperature of the seawater and simulating the temperature change of the seawater; the invention simulates the ocean environment more accurately.
The improved push plate type wave making mode is adopted, the running track of the wave making plate 2 is rectangular, the influence of wave making plate return stroke on waves and unnecessary power loss are effectively avoided, the wave waveform is stable and controllable, and the real marine environment is simulated.
The test piece is overturned at different angles through the inclined overturning device 6 and the inclined overturning driving device 7, so that impact of seawater on different angles and different positions of the ocean facility is simulated; the test piece is driven by the lifting device, the water inlet condition can be flexibly adjusted, and the full-immersion, half-immersion or dry-wet alternate corrosion state of the test piece is realized.
According to the invention, the Fe-based amorphous coating is adopted to spray the inner wall of the test tank body and the core component of the test device, so that the service life of the device is effectively prolonged.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (1)
1. A test method for simulating marine corrosion environment is characterized in that,
the device comprises a corrosion test groove, a wave-making plate, a wave-making device, a lifting device, a temperature control device, an inclined overturning device and an inclined driving device; the inner wall of the corrosion test groove is coated with an Fe-based amorphous coating, and the wave-making plate and the inclined overturning device are positioned in the corrosion test groove; the tilting and overturning device is fixed on the lifting device, the lifting device drives the tilting and overturning device to lift, the tilting and overturning device is connected with the tilting and overturning driving device, and the tilting and overturning driving device drives the tilting and overturning device to tilt and overturn; the wave-making plate is connected with the wave-making device, and the wave-making device drives the wave-making plate to move along a rectangular track;
the wave generating device comprises a wave generating motor, an internal gear, an external gear and a connecting rod; the wave-making motor is connected with an internal gear which is meshed with the external gear; the connecting rod is provided with 2 bends of 90 degrees, one end of the connecting rod is connected with the internal gear, and the other end is connected with the wave-making plate;
the lifting device comprises a lifting motor, a gear, a rack and a sliding rail; the rack is arranged on the slide rail, the rack is meshed with the gear, the lifting motor is connected with the gear, and the lifting motor drives the gear to rotate so as to drive the rack to lift up and down along the slide rail;
the tilting and overturning device comprises an objective table, a universal ball joint and a carrier; the object stage is fixed on the lifting device, and the object carrier is connected with the object stage through a universal ball joint;
the inclination driving device comprises a main hydraulic device and a sub-hydraulic device; the push rod of the main hydraulic device is positioned in the middle of the hydraulic cylinder, two ends of the push rod of the main hydraulic device are respectively connected with the piston, two ends of the hydraulic cylinder of the main hydraulic device are respectively connected with the sub-hydraulic devices through guide pipes, and the push rod of the sub-hydraulic devices is connected with the tilting and overturning device;
the method specifically comprises the following steps:
firstly, spraying an Fe-based amorphous coating on the inner wall of a test tank body and a core component of a test device;
1) And (3) batching: respectively weighing 143.1-144.41 g of Fe, 21.38-22.72 g of Si, 4.36-4.43 g of B, 3.61-3.77 g of P, 0.961-0.975 g of C and 3.74-3.76 g of Nb according to the atomic percentage to form a raw material 180g for preparing Fe63.5-64.5Si19.3-21 B0.95-11P 2.5-3.3C1.77-2.23 Nb1 bulk amorphous alloy, wherein the purity of metal Fe is more than or equal to 99.8%; the purity of the metal Ta is more than or equal to 99.5 percent; the purity of the metalloid B is more than or equal to 99.5%; the purity of Ru is more than 99.5%;
2) Smelting a master alloy: putting the raw materials into a vacuum induction smelting furnace to be smelted into master alloy, wherein the smelting conditions are as follows: the vacuum degree in the vacuum induction smelting furnace is more than 3.5 multiplied by 10 -2 Pa, smelting time is 5-10 min;
3) Placing the master alloy into an induction furnace of a rapid solidification device, regulating induction current to 15A, spraying a melt into a copper mold after the master alloy is completely melted, and cooling along with the copper mold to obtain Fe64Si20B10P3C2Nb1 block amorphous alloy with the diameter of 1.8 mm-2.2 mm;
4) Placing the alloy rod in electric spark spraying equipment, wherein the voltage is 220-240V, the current is 290-310A, and the alloy rod is uniformly sprayed for 3-4 times;
step two, injecting seawater into the test tank, and adding weak acid or weak base to accelerate the corrosion speed by changing the acid-base concentration; the test piece is made of steel for ocean engineering for manufacturing actual ocean facilities;
step three, heating or cooling the seawater through a temperature control device, wherein the temperature of the seawater can be controlled within the range of-2 ℃ to 30 ℃;
step four, starting a wave-making motor, wherein the wave-making device drives the wave-making plate to move along a preset track, so that wave with controllable and stable wave shape can be manufactured, and the real ocean environment can be simulated;
fifthly, adjusting the inclination angle of the test piece through the inclination driving device, overturning the test piece at different angles, and simulating impact of seawater on different angles and different parts of the marine facility;
step six, starting a lifting motor, wherein the rotating speed is 7.2 r/s-50 r/s, and the lifting device drives the test piece to lift, so that the corrosion state of full immersion, half immersion or dry-wet alternation of the test piece is realized, and the lifting period and the descending period are controlled to be 3-6 s;
step seven, setting the test time to be 3 h-72 h, and taking out the test piece to perform corrosion measurement after the test is finished;
step eight, performing corrosion measurement according to GB 6384-86 standard;
and step nine, carrying out infrared thermal imaging nondestructive testing on the test piece which is not subjected to corrosion treatment.
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| CN111999255B (en) * | 2020-08-13 | 2024-01-19 | 中冶建筑研究总院（深圳）有限公司 | Marine environment steel structure coating detection method, device, server and storage medium |
| CN113791022A (en) * | 2021-08-25 | 2021-12-14 | 芜湖双翼液压件有限公司 | Method for rapidly detecting corrosion resistance of iron-based plastic layer |
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