CN104865179B - A kind of gathering line corrosion inhibiter film layer evaluation experimental device - Google Patents
A kind of gathering line corrosion inhibiter film layer evaluation experimental device Download PDFInfo
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- CN104865179B CN104865179B CN201510213281.3A CN201510213281A CN104865179B CN 104865179 B CN104865179 B CN 104865179B CN 201510213281 A CN201510213281 A CN 201510213281A CN 104865179 B CN104865179 B CN 104865179B
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Abstract
A kind of sour natural gas gathering line internal corrosion prevention technology field of the present invention, and in particular to the testing equipment that anti-H 2 S, the corrosion inhibiter film layer of antiacid corrosion are evaluated.A kind of gathering line corrosion inhibiter film layer evaluation experimental device, autoclave and gas circulator are provided with the lower section pipeline of loop pipeline, gas circulator is located at the left side of autoclave, if offering dry hole on the top pipeline of loop pipeline, resistance probe is sequentially placed in hole, electrochemical probe, weightless sample, Hygrothermograph, pressure gauge and sampler, above loop pipeline hole is offered on pipeline below the weightless sample of correspondence, thickness measuring probe is placed in hole, access port is set on the top pipeline of loop pipeline, atomizer is set at access port, access port is connected with corrosion inhibiter storage tank, the exit of corrosion inhibiter storage tank sets booster pump, test gas steel cylinder is connected with by gas valve on the side pipeline of loop pipeline, the weightless sample is connected by wire with outside electrochemical workstation.
Description
Technical field
Sour natural gas gathering line internal corrosion prevention technology field of the present invention, and in particular to a kind of anti-H 2 S, antiacid corrosion
Corrosion inhibiter film layer evaluate testing equipment.
Background technology
Mainly there are three kinds for the anti-corrosion approach of acid gas field gathering system：Select resistant material, inside coating or lining
In, and filling corrosion inhibiter.Resistant material cost is high, and coated liner difficulty of construction is big, and easy aging, which comes off, causes plugging, and adds
Note corrosion inhibiter can not only economic and reliable again extremely flexible control pipeline corrosion, thus in pipeline corrosion protection engineering use it is the widest
It is general.Therefore, corrosion expert both domestic and external successfully develops the various corrosion inhibiter for being adapted to acid gas field by engineering practice, in life
The corrosion that collection transmission pipe network is carried out by the way of continuously being filled during the inner-walls of duct corrosion inhibiter pre-coating film and gas transmission in production is prevented
Shield.
Although these corrosion inhibiter have certain corrosion mitigating effect in static high sour environment containing H2S/CO2, in acidity
Corrosion inhibiter film layer may be desorbed from pipe surface due to the shear action of flow media and lose inhibition in the flow media in gas field
Effect.The corrosion mitigating effect of inner-walls of duct is influenceed very big by nowed forming, and the flow behavior under various nowed formings has significantly
Difference, shear force also has significant difference suffered by the inhibitor film of inner-walls of duct, so as to affect corrosion inhibiter
The formation of conveying, distribution, attachment, and corrosion inhibition film, stably, destruction, the rule repaired etc., thus cause the inhibition of corrosion inhibiter to be imitated
Fruit is also different, but at present the inhibitor film that is precoated of inner-walls of duct under the souring of flow media its corrosion mitigating effect and when
Effect property lacks effective evaluation method and detection means.
In addition, for the charging method of acid gas field gathering system corrosion inhibiter, lacking effective method and apparatus to evaluate
With the corrosion mitigating effect that corrosion inhibiter is continuously injected under monitoring flow media effect, the dosage for being continuously injected into corrosion inhibiter is also difficult to accurately have
Effect ground is determined, certain difficulty is brought to acid gas field corrosion control.
Current existing film layer evaluation focuses mostly in the field such as static evaluation device and evaluation model calculating, without dynamic ring
Corrosion inhibiter film layer and the overall merit device continuously filled under border, detection and evaluation result and effect of field application deviation are larger,
The true effect of corrosion inhibiter can not be reflected.
The content of the invention
It is an object of the invention to for acid gas field gathering line system inhibiter film layer and the efficiency continuously filled not
Dynamic accurate evaluation problem detects evaluation experimental device there is provided a kind of acid gas gathering line corrosion inhibiter efficiency.
The technical scheme is that：
On a kind of gathering line corrosion inhibiter film layer evaluation experimental device, including loop pipeline, the lower section pipeline of loop pipeline
Autoclave and gas circulator are provided with, gas circulator, which is located on the left side of autoclave, the top pipeline of loop pipeline, to be opened up
If there is dry hole, resistance probe, electrochemical probe, weightless sample, Hygrothermograph, pressure gauge and sampler, ring are sequentially placed in hole
Above the pipeline of road placement thickness measuring probe, the upper square tube of loop pipeline in hole, hole are offered on pipeline below the weightless sample of correspondence
Setting atomizer at access port, access port is set on road, and access port is connected with corrosion inhibiter storage tank, the exit of corrosion inhibiter storage tank
Test gas steel cylinder is connected with by gas valve on setting booster pump, the side pipeline of loop pipeline, the weightless sample leads to
Wire is crossed to be connected with outside electrochemical workstation.
Specifically, the loop pipeline is by 316L stainless steels or the making of nickel-base alloy material.
The acid gas gathering line corrosion inhibiter film layer evaluation experimental device that the present invention is provided, using 316L stainless steels or Ni-based conjunction
Golden material manufacture, excellent anticorrosive effect is respectively provided with to high pressure, the carbon dioxide of high concentration, hydrogen sulfide moisture and acid solution, can
It is used as high-hydrogen sulfide, carbon dioxide gas collector and delivery pipe corrosion inhibiter thickness evaluating apparatus or inhibition efficiency evaluating apparatus.This
Device is used to the corrosion inhibiter film layer benchmark test under the conditions of lab simulation sour natural gas erosion, can be according to experiment needs
Acid gas component, pressure and flow velocity are adjusted, and realizes the dynamic to specimen surface corrosion inhibiter film layer corrosion resistance and thickness
Monitoring, can simulate the corrosion inhibiter of operating mode dynamic evaluation inner surface of pipeline or the military service performance of drag reducer, be effective evaluation inhibition
Agent service life, reduction corrosion inhibiter use cost provide operation foundation.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
The pressure gauge of 1 loop pipeline, 2 autoclave, 3 corrosion inhibiter storage tank, 4 booster pump, 5 atomizer 6
The weightless sample of 7 gas valve, 8 thickness measuring probe, 9 resistance probe, 10 electrochemical probe 11
The electrochemical workstation of 12 Hygrothermograph, 13 sampler, 14 gas circulator, 15 test gas steel cylinder 16.
Embodiment
A kind of gathering line corrosion inhibiter film layer evaluation experimental device, including by 316L stainless steels or nickel-base alloy material system
Autoclave 2 and gas circulator 14 are provided with the loop pipeline 1 of work, the lower section pipeline of loop pipeline 1, autoclave 2 is loop
Pipeline 1 provides high steam, and to simulate the wet gas environments in pipeline, gas circulator 14 is located at the left side of autoclave 2, gas
Circulating pump 14 provides circulating current for loop.
If offered on the top pipeline of loop pipeline 1 be sequentially placed in dry hole, hole resistance probe 9, electrochemical probe 10,
On weightless sample 11, Hygrothermograph 12, pressure gauge 6 and sampler 13, the top pipeline of loop pipeline 1 under correspondence weightlessness sample 11
Side, which offers to place to set on thickness measuring probe 8, the top pipeline of loop pipeline 1 in hole, hole, sets atomization at access port, access port
Nozzle 5, access port is connected with corrosion inhibiter storage tank 3, and the exit of corrosion inhibiter storage tank 3 is set in booster pump 4, corrosion inhibiter storage tank 3
Corrosion inhibiter is injected in loop pipeline 1 and carried by circulating current by atomizer 5 after the supercharging of booster pump 4 and flowed in the loop
It is dynamic.Test gas steel cylinder 15, the resistance probe 9, electrochemistry are connected with by gas valve on the side pipeline of loop pipeline 1
Probe 10 and weightless sample 11 are connected by wire with outside electrochemical workstation 16.
The experimental rig that the present invention is provided, first turns on the gas in gas circulator 14, loop pipeline before on-test
Body produces circulating current in the direction of the clock, and being then turned on autoclave 2 makes the gas temperature in loop pipeline reach design temperature, it
After to be then turned on test gas steel cylinder 15 be loop supercharging, while opening gas valve 7, test gas enters ring through gas valve 7
Road pipeline 1, finally opens booster pump 4 and provides atomization corrosion inhibiter for loop air flow.
Electrochemical workstation 16 is opened, resistance probe 9, electrochemical probe 10 and the weightlessness being connected with work station are gathered in real time
The corrosion current of sample 11 and impedance data, you can obtain the corrosion rate of corrosion inhibiter in the loop, and then by corrosion rate evaluation
Corrosion inhibiter film performance.
Claims (2)
1. a kind of gathering line corrosion inhibiter film layer evaluation experimental device, including loop pipeline（1）, loop pipeline（1）Lower square tube
Autoclave is provided with road（2）And gas circulator（14）, gas circulator（14）Positioned at autoclave（2）Left side, its feature
It is, loop pipeline（1）If top pipeline on offer in dry hole, hole and be sequentially placed resistance probe（9）, electrochemical probe
（10）, weightless sample（11）, Hygrothermograph（12）, pressure gauge（6）And sampler（13）, loop pipeline（1）It is right on the pipeline of top
Should weightless sample（11）Lower section offer in hole, hole placement thickness measuring probe（8）, loop pipeline（1）Top pipeline on set
Atomizer is set at access port, access port（5）, access port is connected with corrosion inhibiter storage tank（3）, corrosion inhibiter storage tank（3）Outlet
Place sets booster pump（4）, loop pipeline（2）Side pipeline on test gas steel cylinder is connected with by gas valve（15）, institute
State resistance probe（9）, electrochemical probe（10）With weightless sample（11）Pass through wire and outside electrochemical workstation（16）Connection.
2. a kind of gathering line corrosion inhibiter film layer evaluation experimental device according to claim 1, it is characterised in that the loop
Pipeline（1）It is by 316L stainless steels or the making of nickel-base alloy material.
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| CN201510213281.3A CN104865179B (en) | 2015-04-30 | 2015-04-30 | A kind of gathering line corrosion inhibiter film layer evaluation experimental device |
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| CN201510213281.3A CN104865179B (en) | 2015-04-30 | 2015-04-30 | A kind of gathering line corrosion inhibiter film layer evaluation experimental device |
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| CN104865179A CN104865179A (en) | 2015-08-26 |
| CN104865179B true CN104865179B (en) | 2017-08-01 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928862A (en) * | 2016-04-19 | 2016-09-07 | 西南石油大学 | Monitoring device and monitoring method for on-line monitoring of corrosion degree of medium injected into gas-injection well |
| CN105823703B (en) * | 2016-05-24 | 2018-05-01 | 西南石油大学 | It is a kind of to wash away under operating mode the device and method for evaluating inhibitor film integrality |
| CN106950170A (en) * | 2017-03-23 | 2017-07-14 | 中国石油天然气股份有限公司 | Monitoring device for performance of corrosion inhibitor film |
| CN107796749B (en) * | 2017-10-26 | 2020-02-07 | 西南石油大学 | Corrosion inhibitor optimization and corrosion prevention effect evaluation test device and method |
| CN109100293B (en) * | 2018-08-14 | 2022-02-01 | 西南交通大学 | Accelerated corrosion test device for bilateral corrosion type lining structure and corrosion control method |
| CN109596503A (en) * | 2018-11-01 | 2019-04-09 | 中国石油天然气集团有限公司 | A kind of in-service high sulfur-containing natural gas pipe material Adaptability Evaluation Method |
| CN110702595B (en) * | 2019-10-18 | 2022-06-17 | 西安石油大学 | Multifunctional automatic simulation test device for top corrosion of wet gas pipeline |
| CN113970505A (en) * | 2020-07-22 | 2022-01-25 | 中国石油天然气股份有限公司 | Device and method for evaluating diffusion behavior of corrosion inhibitor |
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