CN204116273U - The cathodic protection research device of simulation flowing Seawater flow velocity - Google Patents
The cathodic protection research device of simulation flowing Seawater flow velocity Download PDFInfo
- Publication number
- CN204116273U CN204116273U CN201420569776.0U CN201420569776U CN204116273U CN 204116273 U CN204116273 U CN 204116273U CN 201420569776 U CN201420569776 U CN 201420569776U CN 204116273 U CN204116273 U CN 204116273U
- Authority
- CN
- China
- Prior art keywords
- flow velocity
- sample
- electrochemical
- electrode
- outer tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The utility model openly simulates cathodic protection research device and the application thereof of flowing Seawater flow velocity; be made up of flow velocity analogue means, electrochemical experimental device, flow velocity measuring device; flow velocity analogue means utilizes the cooperation of pump, suction hose, rising pipe and outer tube; to make to obtain stable flow velocity in electrochemical measurement region; the flow velocity measuring device be made up of U-tube manometer and Pitot tube measures flow velocity, utilizes electrochemical experimental device to obtain the electrochemical properties of sample in electrochemical measurement region simultaneously.The technical solution of the utility model makes simple, and cost is low, simple to operate.The utility model can simulate the electrochemistry experiment under 0 ~ 20m/s flow velocity, and scour process is only for working electrode, contrast electrode can not be made unstable, carry out different angles, Cathodic Protection that different in flow rate washes away lower typical ocean steel.
Description
Technical field
The utility model belongs to technical field of electrochemical detection, more particularly, relates to and a kind ofly simulates the cathodic protection research device of flowing Seawater flow velocity and the application in the behavior of Electrochemical Detection metal marine corrosion thereof.
Background technology
In recent years, the loss caused due to marine corrosion is increasing, be used in every year boats and ships, offshore drilling platform maintenance cost more and more higher, the Protective Research for marine corrosion is extremely urgent.But now for the research of marine corrosion, under major part is confined to static sea state.Metal has very large gap at flowing seawater from the corrosion of static seawater: flow velocity is different; this not only can cause the change of dissolved oxygen DO and metal surface ion concentration in solution; and silt, current etc. can be brought the physical impact of metal, there is impact to the diaphragm of specimen surface.Therefore, flow velocity is the very important influence factor of marine corrosion.At present, the method for simulation flowing seawater has multiple: rotate flushing method, pipe flow field simulation flushing method, injecting type flushing method etc., corresponding device is rotating circular disk erosion corrosion testing machine, pipe flow field simulation test unit, injecting type cavitation test device respectively.Rotating circular disk washout test can only simulate less flow velocity, and when flow velocity is larger, can produces whirlpool, have impact to test; Pipe flow field simulation is comparatively complicated, and cost is comparatively large, and test material needs to be tubulose, and limitation is large; General injecting type test unit is mainly used in simulating cavitation damage, corrosion of metal situation when applying cathodic protection under all can not well simulating flowing seawater.Not yet there is water tank type jet to simulate flowing seawater at present and carry out the relevant bibliographical information of cathodic protection test.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art; the device of the metallic cathode Protective strategy under simulation different in flow rate is provided; overcome the complicated defect of design of revolving low flow velocity simulated defect and pipe stream; realize the flow velocity simulation of different size; carry out Cathodic Protection, device and simple to operate.
Technical purpose of the present utility model is achieved by following technical proposals:
The cathodic protection research device of simulation flowing Seawater flow velocity, is made up of flow velocity analogue means, electrochemical experimental device, flow velocity measuring device, wherein:
Described flow velocity analogue means comprises tank, pump, suction hose, rising pipe and outer tube; In the central authorities of described tank, electrochemical measurement region is set; The water outlet port of described suction hose is connected with pump, and the water inlet port of suction hose is arranged in tank; The water inlet port of described rising pipe is connected with pump, and the water outlet port of rising pipe is arranged in tank, and is fixedly linked with the water inlet port of outer tube; The water outlet port of described outer tube be arranged on electrochemical measurement region middle position and near sample fixed station, and the adjustable length of outer tube.So, pump is absorbed water by suction hose, the current having certain initial flow rate are obtained at effluent pipe mouth, the current of this flow velocity are through the outer tube of adjustable-length, final flow rate is obtained at the water outlet port of outer tube, namely near sample, form the flow velocity of simulation, by adjusting the power of pump, (power of pump is larger, initial flow rate is larger) or the length of outer tube (outer tube length is longer, it is more serious that initial flow rate is decayed), to form simulation flow velocity at the water outlet port (namely near sample) of outer tube;
Described flow velocity measuring device is made up of pressure gauge and Pitot tube, the measurement head of described Pitot tube is arranged on the middle position in electrochemical measurement region and near sample fixed station, the central authorities of measurement head and the central authorities of outer tube of described Pitot tube are positioned in same level; The afterbody cross mouth of described Pitot tube is connected with pressure gauge, the current of outer tube water outlet port flow through the measurement head through Pitot tube after sample, produce a pressure, be reacted on pressure gauge, calculate by pressure gauge the dynamic pressure that Pitot tube measures head, utilize the flow velocity near following formula working sample;
In formula: V-water flow velocity (m/s);
K-Pitot tube coefficient;
The dynamic pressure (Pa) of P-recorded by Pitot tube;
ρ-fluid (water) density (kg/m
3);
Described electrochemical experimental device comprises sample bench, three-electrode system and electrochemical workstation, the upper surface of described sample bench is fixedly installed sample, sample bench is fixedly installed on the central authorities in electrochemical measurement region, and the central authorities of measurement head of sample and Pitot tube, the central authorities of outer tube are positioned in same level; Described three-electrode system comprises working electrode (i.e. sample), contrast electrode and auxiliary electrode, and using sample that sample bench is fixed as working electrode, described three-electrode system is connected with electrochemical workstation.
In technique scheme, described tank is rectangular parallelepiped, described suction hose, the length that the diameter of rising pipe and outer tube is significantly less than tank is high, i.e. described suction hose, rising pipe and the diameter of outer tube and the length of tank high compared with, little one to two orders of magnitude, such as select the enclosed slot of 400x70x50mm, the diameter of suction hose and rising pipe is 2.5mm, outer tube diameter is 2.8mm (diameter slightly larger than blowing water pipe), so, compared with whole tank, suction hose, the diameter of rising pipe and outer tube is less, only can produce current at water inlet port and water outlet near ports, these current are smaller and can not cause the change of current in whole tank.
In technique scheme, described pressure counts U-tube manometer, and the afterbody cross mouth of described Pitot tube is connected by flexible conduit with pressure gauge.
In technique scheme, in described three-electrode system, described contrast electrode is SCE electrode, and described auxiliary electrode is platinum electrode, and described electrochemical workstation is PARSTAT2273 electrochemical workstation.
In technique scheme, described sample bench arranges sample fixed mount, and for installing and fixing sample, and sample fixed mount can rotate relative to horizontal direction, to change the angle that specimen sample surface flows to flowing seawater, and then the scouring experiment of simulation different angles flowing seawater.
Adopt traditional three-electrode system, working electrode is the sample under certain flow rate, general in square, and welding lead is drawn, except workplace, other face epoxy mortars are smeared, general thickness is 0.1-0.3mm, and workplace is generally polished successively with waterproof abrasive paper, washed with de-ionized water, cotton ball soaked in alcohol is cleaned, and cold wind dries up.Auxiliary electrode is Pt electrode, and contrast electrode is saturated calomel electrode (SCE); Three electrodes are fixed on sample bench; and ensure that external mouth of pipe center and sample are in same level, connect PARSTAT2273 workstation, the polarization curve under different in flow rate can be measured; electrochemical impedance spectroscopy under different in flow rate, different cathodic protection potential, and then obtain associated erosion parameter.Circuit arrangement can provide cathodic protection current for a long time, can obtain the long-term corrosion experiment under different in flow rate, different cathodic protection potential, change the flow velocity size residing for sample by the length of the power or outer tube that adjust pump; And the surperficial angle flowed to flowing seawater of specimen sample can be changed by rotating sample fixed mount, and then the scouring experiment of simulation different angles flowing seawater.
Compared with prior art, the technical solution of the utility model makes simple, and cost is low, simple to operate.The utility model can simulate the electrochemistry experiment under 0 ~ 20m/s flow velocity, and scour process is only for working electrode, contrast electrode can not be made unstable, carry out different angles, Cathodic Protection that different in flow rate washes away lower typical ocean steel.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model fluidic device, and wherein 1 is suction hose, and 2 is rising pipe, and 3 is Pitot tube, and 4 is flexible conduit, and 5 is tank, and 6 is outer tube, and 7 is sample fixed mount, and the a-quadrant of dotted line frame is electrochemical appliance region.
Fig. 2 is the electrochemical impedance spectrum (1) utilizing fluidic device of the present utility model to carry out simulation test, and experiment condition is simulation flow velocity 2m/s, and Q235 material is at the electrochemical impedance spectroscopy of different protection potential.
Fig. 3 is the electrochemical impedance spectrum (2) utilizing fluidic device of the present utility model to carry out simulation test, and experiment condition is simulation flow velocity 2m/s, and Q235 material is at the electrochemical impedance spectroscopy of different protection potential.
Fig. 4 is the electrochemical impedance spectrum (3) utilizing fluidic device of the present utility model to carry out simulation test, and experiment condition is simulation flow velocity 4m/s, and Q235 material is at the electrochemical impedance spectroscopy of different protection potential.
Fig. 5 is the electrochemical impedance spectrum (4) utilizing fluidic device of the present utility model to carry out simulation test, and experiment condition is simulation flow velocity 6m/s, and Q235 material is at the electrochemical impedance spectroscopy of different protection potential.
Fig. 6 is the electrochemical impedance spectrum (5) utilizing fluidic device of the present utility model to carry out simulation test, and experiment condition is simulation flow velocity 6m/s, and Q235 material is at the electrochemical impedance spectroscopy of different protection potential.
Embodiment
The technical solution of the utility model is further illustrated below in conjunction with specific embodiment.
As shown in Figure 1, the cathodic protection research device of simulation flowing Seawater flow velocity, is made up of flow velocity analogue means, electrochemical experimental device, flow velocity measuring device, wherein:
Described flow velocity analogue means comprises tank, pump, suction hose, rising pipe and outer tube; The water outlet port of described suction hose is connected with pump, and the water inlet port of suction hose is arranged in tank; The water inlet port of described rising pipe is connected with pump, and the water outlet port of rising pipe is arranged in tank, and is fixedly linked with the water inlet port of outer tube; The water outlet port of described outer tube be arranged on electrochemical measurement region middle position and near sample fixed station, and the adjustable length of outer tube.So, pump is absorbed water by suction hose, the current having certain initial flow rate are obtained at effluent pipe mouth, the current of this flow velocity are through the outer tube of adjustable-length, final flow rate is obtained at the water outlet port of outer tube, namely near sample, form the flow velocity of simulation, by adjusting the power of pump, (power of pump is larger, initial flow rate is larger) or the length of outer tube (outer tube length is longer, it is more serious that initial flow rate is decayed), to form simulation flow velocity at the water outlet port (namely near sample) of outer tube;
The rated power selecting water pump is 2.2KW, the enclosed slot of 400x70x50mm, the diameter of suction hose and rising pipe is 2.5mm, outer tube diameter is 2.8mm (diameter slightly larger than blowing water pipe), so, compared with whole tank, the diameter of suction hose, rising pipe and outer tube is less, only can produce current at water inlet port and water outlet near ports, these current are smaller and can not cause the change of current in whole tank.
Described flow velocity measuring device is made up of pressure gauge and Pitot tube, the measurement head of described Pitot tube is arranged on the middle position in electrochemical measurement region and near sample fixed station, the central authorities of measurement head and the central authorities of outer tube of described Pitot tube are positioned in same level; The afterbody cross mouth of described Pitot tube is connected with pressure gauge, the current of outer tube water outlet port flow through the measurement head through Pitot tube after sample, produce a pressure, be reacted on pressure gauge, calculate by pressure gauge the dynamic pressure that Pitot tube measures head, utilize the flow velocity near formula working sample in foregoing.
In the central authorities of described tank, electrochemical measurement region is set, the i.e. region A of dotted line frame in figure, length and width are 10mmx5mm, described electrochemical experimental device comprises sample bench, three-electrode system and electrochemical workstation, the upper surface of described sample bench is fixedly installed sample, sample bench is fixedly installed on the central authorities in electrochemical measurement region, and the central authorities of measurement head of sample and Pitot tube, the central authorities of outer tube are positioned in same level; Described three-electrode system comprises working electrode (i.e. sample), contrast electrode and auxiliary electrode, and using sample that sample bench is fixed as working electrode, described three-electrode system is connected with electrochemical workstation.
Described pressure counts U-tube manometer, and the afterbody cross mouth of described Pitot tube is connected by flexible conduit with pressure gauge.
In described three-electrode system, described contrast electrode is SCE electrode, and described auxiliary electrode is platinum electrode, and described electrochemical workstation is PARSTAT2273 electrochemical workstation.
Described sample bench arranges sample fixed mount, for installing and fixing sample, and sample fixed mount can rotate relative to horizontal direction, to change the angle that specimen sample surface flows to flowing seawater, and then the scouring experiment of simulation different angles flowing seawater.
Working electrode (WE) is Q235 straight carbon steel, is of a size of 1 × 1 × 0.3cm
3, effective working area is 1cm
2, wire welds in the non-working surface of working electrode and derives, and non-working surface epoxy mortar encapsulates.Workplace is generally polished to 1200# and level successively with waterproof abrasive paper, washed with de-ionized water, and cotton ball soaked in alcohol wiping, cold wind dries up.Auxiliary electrode is Pt electrode, and contrast electrode is saturated calomel electrode (SCE); Three electrodes are fixed on sample bench; and ensure that external mouth of pipe center and sample are in same level, connect PARSTAT2273 workstation, the polarization curve under different in flow rate can be measured; electrochemical impedance spectroscopy under different in flow rate, different cathodic protection potential, and then obtain associated erosion parameter.Circuit arrangement can provide cathodic protection current for a long time, can obtain the long-term corrosion experiment under different in flow rate, different cathodic protection potential, change the flow velocity size residing for sample by the length of the power or outer tube that adjust pump; And the surperficial angle flowed to flowing seawater of specimen sample can be changed by rotating sample fixed mount, and then the scouring experiment of simulation different angles flowing seawater.
Connect pumping source, make hopper form stable water cycle system.Ensureing that the power of pump is constant, by regulating outer tube length, obtaining different flow velocitys: such as 2m/s, 4m/s, 6m/s.
Utilize U-tube manometer to coordinate with Pitot tube and determine flow velocity, Pitot tube is measured head and be placed on the position being positioned at same level line with overcoat mouth of pipe center and test specimens product, current flow through when Pitot tube measures head can produce a pressure, be reacted on pressure gauge, calculate by pressure gauge the dynamic pressure that Pitot tube head records, utilize
In formula: V-water flow velocity (m/s)
K-Pitot tube coefficient
The dynamic pressure (Pa) of P-recorded by Pitot tube
ρ-fluid density (kg/m
3)
Measure the flow velocity of tested point, determine 2m/s, the outer tube length of 4m/s, 6m/s.Place the sample (WE) handled well at determined flow position, and near sample, fix contrast electrode, auxiliary electrode, form three-electrode system.(1) three electrode is connected with electrochemical test proving installation PARSTAT2273 electrochemical workstation respectively.Treat that sample is in stable condition, start to measure polarization curve, electrochemical impedance spectroscopy, by software matching, measure a series of electrochemical parameter; (2) ZF-3 potentiostat is utilized to provide the different cathodic protection potential-600mv of different duration to-1100mv for sample, as shown in drawings.
Above exemplary description is done to the utility model; should be noted that; when not departing from core of the present utility model, any simple distortion, amendment or other those skilled in the art can not spend the equivalent replacement of creative work all to fall into protection domain of the present utility model.
Claims (5)
1. simulate the cathodic protection research device of flowing Seawater flow velocity, it is characterized in that, be made up of flow velocity analogue means, electrochemical experimental device, flow velocity measuring device, wherein:
Described flow velocity analogue means comprises tank, pump, suction hose, rising pipe and outer tube; In the central authorities of described tank, electrochemical measurement region is set; The water outlet port of described suction hose is connected with pump, and the water inlet port of suction hose is arranged in tank; The water inlet port of described rising pipe is connected with pump, and the water outlet port of rising pipe is arranged in tank, and is fixedly linked with the water inlet port of outer tube; The water outlet port of described outer tube be arranged on electrochemical measurement region middle position and near sample fixed station, and the adjustable length of outer tube;
Described flow velocity measuring device is made up of pressure gauge and Pitot tube, the measurement head of described Pitot tube is arranged on the middle position in electrochemical measurement region and near sample fixed station, the central authorities of measurement head and the central authorities of outer tube of described Pitot tube are positioned in same level; The afterbody cross mouth of described Pitot tube is connected with pressure gauge;
Described electrochemical experimental device comprises sample bench, three-electrode system and electrochemical workstation, the upper surface of described sample bench is fixedly installed sample, auxiliary electrode and contrast electrode, sample bench is fixedly installed on the central authorities in electrochemical measurement region, and the central authorities of measurement head of sample and Pitot tube, the central authorities of outer tube are positioned in same level; Described three-electrode system comprises working electrode, contrast electrode and auxiliary electrode, and using sample that sample bench is fixed as working electrode, described three-electrode system is connected with electrochemical workstation.
2. the cathodic protection research device of simulation flowing Seawater flow velocity according to claim 1, it is characterized in that, described sample bench arranges sample fixed mount, and sample fixed mount can rotate relative to horizontal direction.
3. the cathodic protection research device of the simulation flowing Seawater flow velocity according to claims 1 or 2, it is characterized in that, described pressure counts U-tube manometer, and the afterbody cross mouth of described Pitot tube is connected by flexible conduit with pressure gauge.
4. the cathodic protection research device of the simulation flowing Seawater flow velocity according to claims 1 or 2; it is characterized in that, in described three-electrode system, described contrast electrode is SCE electrode; described auxiliary electrode is platinum electrode, and described electrochemical workstation is PARSTAT2273 electrochemical workstation.
5. the cathodic protection research device of the simulation flowing Seawater flow velocity according to claims 1 or 2; it is characterized in that; described tank is rectangular parallelepiped; the length that the diameter of described suction hose, rising pipe and outer tube is significantly less than tank is high; namely described suction hose, rising pipe and the diameter of outer tube and the length of tank high compared with, little one to two orders of magnitude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420569776.0U CN204116273U (en) | 2014-09-29 | 2014-09-29 | The cathodic protection research device of simulation flowing Seawater flow velocity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420569776.0U CN204116273U (en) | 2014-09-29 | 2014-09-29 | The cathodic protection research device of simulation flowing Seawater flow velocity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204116273U true CN204116273U (en) | 2015-01-21 |
Family
ID=52333570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420569776.0U Withdrawn - After Issue CN204116273U (en) | 2014-09-29 | 2014-09-29 | The cathodic protection research device of simulation flowing Seawater flow velocity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204116273U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237358A (en) * | 2014-09-29 | 2014-12-24 | 天津大学 | Cathodic protection research device for simulating dynamic seawater flow velocity and application thereof |
| CN110659011A (en) * | 2019-09-26 | 2020-01-07 | 自然资源部第一海洋研究所 | Atmospheric ocean data display platform, system and server |
-
2014
- 2014-09-29 CN CN201420569776.0U patent/CN204116273U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237358A (en) * | 2014-09-29 | 2014-12-24 | 天津大学 | Cathodic protection research device for simulating dynamic seawater flow velocity and application thereof |
| CN110659011A (en) * | 2019-09-26 | 2020-01-07 | 自然资源部第一海洋研究所 | Atmospheric ocean data display platform, system and server |
| CN110659011B (en) * | 2019-09-26 | 2024-05-10 | 自然资源部第一海洋研究所 | Atmospheric ocean data display platform, system and server |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103293094B (en) | A kind of electro-chemical measuring apparatus and using method thereof that quantitatively can change thickness of liquid film | |
| CN103335939B (en) | Pipe flow type inner wall erosion corrosion test device | |
| CN104237358B (en) | The cathodic protection research device of simulation flowing Seawater flow velocity and application thereof | |
| CN202110125U (en) | Laboratory detection test cube simulating reinforced concrete electrochemical corrosion | |
| CN202433273U (en) | Horizontal type abrasion test device | |
| CN106841026A (en) | A kind of method for evaluating corrosion inhibiter inhibition efficiency | |
| CN106918545A (en) | The quick corrosion tests and device for realizing stainless steel spot corrosion occurrence and development | |
| CN109444236A (en) | A kind of pipeline erosion corrosion and electrochemical testing device | |
| CN205826490U (en) | A kind of electrochemical experimental device measuring band rusty scale material corrosion resistance | |
| CN106525709A (en) | Electrochemical corrosion test apparatus and application method thereof | |
| CN101923042A (en) | Test method for simulating couple corrosion in seawater scouring environment | |
| CN104458547A (en) | Stress-adjustable corrosion-resistant property measuring device and stress-adjustable corrosion-resistant property measuring method | |
| CN204116273U (en) | The cathodic protection research device of simulation flowing Seawater flow velocity | |
| CN109338372B (en) | Ocean platform cathode protection simulation experiment device and method | |
| CN106525710A (en) | Electrochemical testing device for acoustic-emission-testing-material corrosion performance and application method thereof | |
| CN104568734A (en) | System for monitoring metal corrosion behaviors in flowing corrosive medium | |
| CN102841027A (en) | Test device and test method for measuring erosion and abrasion resistance of hydraulic concrete | |
| CN103614729A (en) | Testing device and method for cathode protection of indoor ship body | |
| CN204359666U (en) | The evaluation appts of soil body corrosion stability under a kind of wind erosion, water erosion and coupled erosion | |
| CN206470167U (en) | A kind of device for simulating lower cathodic protection hydrogen permeability test different in flow rate | |
| CN204228242U (en) | A kind of flow measurement electricity testing device | |
| CN205300835U (en) | Flow flow resistance coefficient detection device of valve | |
| CN204346881U (en) | Metal erosion behavior monitoring system in Flow Corrosion medium | |
| CN106680197B (en) | A kind of simulator and real-time detection method corroding rock | |
| CN106769834A (en) | A kind of device for simulating lower cathodic protection hydrogen permeability test different in flow rate and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150121 Effective date of abandoning: 20160817 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |