CN202486030U - Simulative corrosion tester for upper deck on oil cargo tank - Google Patents
Simulative corrosion tester for upper deck on oil cargo tank Download PDFInfo
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- CN202486030U CN202486030U CN2011205594366U CN201120559436U CN202486030U CN 202486030 U CN202486030 U CN 202486030U CN 2011205594366 U CN2011205594366 U CN 2011205594366U CN 201120559436 U CN201120559436 U CN 201120559436U CN 202486030 U CN202486030 U CN 202486030U
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Abstract
The utility model belongs to the technical field of material corrosion, and in particular relates to a simulative corrosion tester for an upper deck on an oil cargo tank. The device comprises the following units which are in sealed connection through gas pipelines: a gas source supply unit capable of supplying multiple groups of gases, a flow and test sample temperature control unit (4), a gas mixing unit (5), a corrosion reaction unit (6) and an exhaust gas recycling unit (7). According to the utility model, the actual work condition of the oil cargo tank of an oil tank, which is operated on the sea, is conveniently simulated under the laboratory conditions, so that the experiment conditions are closer to natural conditions, a great number of scientific and reasonable test data is obtained in a shorter time, the simulative corrosion tester is used for predicating the safety of the oil cargo tank in the operating time of 25 years, and the maintenance cost is greatly reduced; meanwhile, the simulative corrosion tester is beneficial to reducing the research development period of a new product of corrosion resistant steel of the oil cargo tank.
Description
Technical field
The utility model belongs to the material corrosion technical field, is specifically related to a kind ofly can carry out the tests of simulating device to oil carrier oil cargo tank upper deck corrosion environment.
Background technology
In recent years, the increase that As China's oil consumes, the important strategic status of offshore oil transportation highlights day by day.30 ton supertankers (VLCC) of 30 ton Floating Production oil storage ships (FPSO) of Waigaoqiao Bonded Zone shipyard design-build and Dalian shipyard construction at present provide guarantee for China's offshore oil exploitation and transportation.What the existing oil tanker oil cargo tank used is all kinds of high-strength ship plates, these deck of boat steel under arms in the process because decay resistance is relatively poor, make the life-span of oil carrier shorten greatly, the safety in utilization of oil carrier also receives serious threat.
Because the acting in conjunction of the moisture, salinity and the corrosive gas that contain in the crude oil, the oil tanker oil cargo tank is in the corrosion environment.Especially at the upper deck inside surface of oil cargo tank; Owing to the engine exhaust of the salinity of the volatile ingredient in the crude oil, the seawater of sneaking into, oil-field brine, the inert gas of importing for preventing to explode and boats and ships, the effect that diurnal temperature changes the dew that causes; The oil cargo tank upper deck is in the corrosion environment of a uniqueness; The serious etching problem of generation that has caused oil cargo tank, and various corrosion form mutually promotes, and finally causes the material cracking and causes a large amount of serious accidents.
Therefore, how to follow the tracks of the corrosion process of oil cargo tank, predict that its extent of corrosion becomes the oil carrier oil cargo tank security problem that needs to be resolved hurrily that guarantees.Actual oil carrier oil cargo tank is followed the tracks of detection, find that the residing actual corrosion environment of its upper deck inside surface is comparatively complicated.At first, the oil cargo tank upper surface is in some corrosive atmosphere.Usually in oil cargo tank, fill inert gas (composition of this inert gas comprises O for explosion-proof
2: 5% volume, CO
2The %:13% volume, SO
2: 0.01% volume, surplus are N
2), the O in the inert gas
2, CO
2, SO
2And the H that from crude oil, evaporates
2Corrosive gass such as S can be in upper inside surface (the inboard surface of the upper deck) enrichment of oil tanker oil cargo tank.Simultaneously and since the deck temperature by day with the alternate at night, the upper deck inside surface always is in to be done and wet alternating state.Wet H
2S and O
2And SO
2Deng reacting, can separate out the sulphur of simple substance at the upper deck inside surface.At present for H
2The test unit of S etching problem mainly is corrosion testing apparatus such as HIC, SSCC.But oil cargo tank is a kind of corrosion environment that is in a kind of high low temperature day alternates with night and do not have stress state, traditional all kinds of H
2S, SO
2The stress corrosion device can't carry out simulation test to this.
Summary of the invention
The purpose of the utility model provides a kind ofly can simulate oil cargo tank upper deck corrosion condition preferably, can shorten the test period significantly simultaneously, reduce the oil cargo tank upper deck simulative corrosion test device of testing expenses.
In order to achieve the above object, the utility model provides following technical scheme:
A kind of oil cargo tank upper deck simulative corrosion test device, it comprise by gas line be tightly connected with lower unit: source of the gas feeding unit, flow and specimen temperature control module 4, gas mixed cell 5, corrosion reaction unit 6 and the waste heat recovery unit 7 that can supply many group gases.
Said source of the gas feeding unit comprises at least a in the following gas tank: N
2Supplier tank 1, SO
2+ CO
2+ O
2+ N
2Mixed gas supplier tank 2, and H
2S+N
2Mixed gas supplier tank 3; All gases is exported through flowrate control valve.
Said SO
2+ CO
2+ O
2+ N
2Gas componant in the mixed gas supplier tank 2 by volume number percent is: 26%CO
2+ 0.02%SO
2+ 10%O
2+ surplus N
2H
2S+N
2Gas componant in the mixed gas supplier tank 3 by volume number percent is: 0.1%H
2S+ surplus N
2
Said gas mixed cell 5 comprises a plurality of air intake openings 8 and a gas outlet 11, is provided with between air intake opening 8 and the gas outlet 11 to mix gas barrier 9, and the endpiece that mixes gas barrier 9 connects to vacuum air pump 10, and vacuum air pump 10 joins with gas outlet 11.
Said corrosion reaction unit 6 comprises top board and reactor, and top board is provided with corrosion reaction unit air intake opening 16 and gas outlet 18; Sample 13 is arranged on the top board, and thermometric galvanic couple 15 is connected with sample 13; The top board side is provided with a plurality of airtight fixedly clinchings 12, through airtight fixedly clinching 12 top board is fastened on the reactor; The resistive heater 14 half unsettled reactors that are built in; Distilled water 17 is equipped with in the reactor below, and the height of this distilled water 17 is through filler 19 controls of side, and the reactor outside is provided with the constant temperature water bath device 20 of control distilled water 17 temperature.
Said test unit also comprises the temperature controller that is used to control samples in the corrosion reaction unit 6 day alternates with night temperature variation.
The liquid level of said distilled water 17 is lower than the height of resistive heater 14, and said air intake opening 16 extends under the liquid level that is immersed in distilled water 17.
Said test unit comprises the corrosion reaction unit 21,22,23 of a plurality of series connection.
The beneficial effect of the utility model is:
1) simulation that the utility model device is complete the upper deck corrosion environment of oil carrier oil cargo tank actual motion.Complete corrosion environment main points comprise: a) periodically discharge the corrosive gas of a large amount of various mixing in the crude oil, comprise H in the mixed gas
2S, SO
2, CO
2, O
2Deng, these mixed gass can obtain through gas generation unit and mixed cell.B) upper deck be in periodic diurnal temperature alternately in.Alternately being controlled by heating sensor of diurnal temperature, specimen temperature is obtained by the thermopair on the sample.C) water vapor that discharges in the crude oil can condense at the upper deck lower surface.Keep steady temperature through control reaction member bottom distilled water, and specimen temperature replaces periodically, can let water vapor periodically on the lower surface of reaction member sample, condense.
2) source of the gas is by three portion gas separate storage, and its biggest advantage is to prevent H in the above-mentioned mixed gas
2S and SO
2Chemical reaction takes place in storage process, reduces the corrosive effect of gas to sample.For ease of the periodic sample in the process of the test, warranty test operating personnel's safety feeds N simultaneously
2Carry out emptying, simplified the sampling operation program;
3) through the periodic conversion specimen temperature of built-in heating sensor, and the temperature constant of maintenance distilled water.Can well simulate the oil cargo tank upper deck day alternates with night in the transportation temperature variation at sea, and make the cohesion of water vapor on the upper deck sample, quicken H
2S, SO
2Reaction with sample.
4) can a plurality of reaction members be connected in this test unit, in the economic test of carrying out many rounds and many steel grades under the condition accurately of warranty test data.Will guarantee that simultaneously the connection between a plurality of reaction members is tight, the tail gas of last reaction member inserts in the waste heat recovery unit.
5) can under laboratory condition, conveniently simulate sea service oil carrier oil cargo tank actual condition; Make experiment condition more near state of nature; Make it in short time, to obtain a large amount of scientific and reasonable test figures; Can be used to predict the security of oil cargo tank in 25 year working time, maintenance cost reduces greatly.Also help the research and development cycle that shortens oil cargo tank corrosion-resistant steel new varieties simultaneously.
Description of drawings
Fig. 1 is the schematic flow sheet of the oil cargo tank upper deck simulative corrosion test device of the utility model;
Fig. 2 is the gas mixed cell synoptic diagram among Fig. 1;
Fig. 3 is the corrosion reaction cell schematics among Fig. 1;
Fig. 4 is that a plurality of corrosion reaction units in series of the oil cargo tank upper deck simulative corrosion test device of the utility model cooperate synoptic diagram.
[primary clustering symbol description]
1 N
2Supplier tank
2 SO
2+ CO
2+ O
2+ N
2The mixed gas supplier tank
3 H
2S+N
2The mixed gas supplier tank
4 flows and specimen temperature control module
5 gas mixed cells
6 corrosion reaction unit
7 waste heat recovery unit
8 gas mixed cell air intake openings
9 mix the gas barrier
10 vacuum air pumps
11 gas mixed cell gas outlets
12 airtight fixedly clinchings
13 samples
14 resistive heaters
15 thermometric galvanic couples
16 corrosion reaction unit air intake openings
17 distilled water
Gas outlet, 18 corrosion reaction unit
19 filler
20 constant temperature water bath devices
No. 211 corrosion reaction unit
No. 222 corrosion reaction unit
No. 233 corrosion reaction unit
Embodiment
Be described further according to the embodiment of accompanying drawing below the utility model.
As shown in Figure 1, be the schematic flow sheet of the oil cargo tank upper deck simulative corrosion test device of the utility model, this device comprises: the source of the gas feeding unit is used to generate various etchant gases in the oil cargo tank; Flow and specimen temperature control module 4, day alternates with night to be used to obtain the gas of certain flow and the temperature of control sample 13; Gas mixed cell 5 is used to prepare H
2S, SO
2, O
2, CO
2Mixed gas; Corrosion reaction unit 6 is used to provide the reaction environment of above-mentioned mixed gas and sample 13; Waste heat recovery unit 7 is used for the corrosive exhaust gases behind the recovery test.
Wherein the source of the gas feeding unit comprises: N
2Supplier tank 1 supply gas 1, gas 1 is by N
2Form; SO
2+ CO
2+ O
2+ N
2Mixed gas supplier tank 2 supply gas 2, the gas composition percent by volume of gas 2 is 26%CO
2+ 0.02%SO
2+ 10%O
2+ surplus N
2H
2S+N
2Mixed gas supplier tank 3 supply gas 3, the gas composition percent by volume of gas 3 is 0.1%H
2S+ surplus N
2Wherein gas 2 is mixed for preparation simulation oil cargo tank hybrid corrosion gas with gas 3 through gas mixed cell 5, and gas 1 is used for the bulk testing device is carried out emptying.
As shown in Figure 2; Be the synoptic diagram of the gas mixed cell 5 among Fig. 1, it comprises a plurality of air intake openings 8 and a gas outlet 11, is provided with between air intake opening 8 and the gas outlet 11 to mix gas barrier 9; The endpiece that mixes gas barrier 9 connects to vacuum air pump 10, and vacuum air pump 10 joins with gas outlet 11.Three kinds of gases flow into through three air intake openings 8 respectively, and the mixed gas barrier 9 of flowing through can fully mix multiple gases, and the gas that mixes further mixes back 11 outflows from the gas outlet through vacuum air pump 10.
As shown in Figure 3; Be the synoptic diagram of the corrosion reaction unit 6 among Fig. 1, this corrosion reaction unit 6 comprises top board and reactor, and sample 13 is arranged on the top board; Thermometric galvanic couple 15 is connected with sample 13 and measures its temperature, and this Temperature Feedback collects flow and specimen temperature control module 4; The top board side is provided with a plurality of airtight fixedly clinchings 12, through airtight fixedly clinching 12 top board is fastened on the reactor, and makes reaction environment and atmospheric environment isolated; The resistive heater 14 half unsettled reactors that are built in are by flow and specimen temperature control module 4 its heating-up temperatures of control; Also be provided with corrosion reaction unit air intake opening 16 and gas outlet 18 on the top board; Mixed gas imports in the distilled water 17 through air intake opening 16; And 18 outflows from gas outlet, corrosion reaction unit; Wherein, the liquid level of distilled water is lower than the height of resistive heater 14, and air intake opening 16 extends under the liquid level that is immersed in distilled water; Distilled water 17 in the reactor is filled up through the filler 19 of side, and the temperature of distilled water 17 is controlled through external constant temperature water bath device 20.
In the corrosion reaction unit of present embodiment, sample 13 is embedded in through special mould clamp on the top board of reactor, and the temperature of sample 13 adds heat control by built-in resistive heater 14 in the reactor, and the temperature of distilled water 17 is controlled by water-bath in the reactor.
During test; Control the flow of three kinds of gases respectively by three flowrate control valves in flow and the specimen temperature control module 4; The flow of pilot-gas 2 and gas 3 is 10～50CC/min; Make it carry out mixed in equal amounts through gas mixed cell 5, the gas after mixing feeds in the corrosion reaction unit 6; 14 pairs of samples 13 of resistive heater heat, and by its heating-up temperature of temperature controller control that is provided with in flow and the specimen temperature control module 4, its numerical value collection obtains through thermometric galvanic couple 15, in order to realize sample 13 day alternates with night temperature variation.
Fig. 4 is that a plurality of corrosion reactions of oil cargo tank upper deck simulative corrosion test device unit 21,22,23 series connection of the utility model cooperate synoptic diagram; When needs carry out the oil cargo tank upper deck corrosion test of 1 and above steel grade, can be connected in a plurality of corrosion reactions unit in the utility model.
Use the utility model device to carry out oil cargo tank upper deck simulative corrosion test to ordinary low-alloy steel, it carries out 7 days, 14 days, 21 days, 49 days corrosion tests respectively, has tested the corrosion weight loss of sample and has analyzed corrosion product, and is as shown in table 1.Equally, be employed in actual crude oil oil cargo tank upper deck and carry out coupon corrosion test, tested corrosion weight loss and the corrosion test product in 6 months, 1 year, 2 years respectively, as shown in table 2.Corrosion rate through 25 years low alloy steel of two kinds of method extrapolations is very approaching, and the corrosion test product is FeOOH, Fe simultaneously
3O
4FeS and simple substance S etc.; Through the XRD technical Analysis the quantitative composition of corrosion product, can find out that from table 3 real ship lacing film is formed very approaching with the corrosion product that adopts the utility model analogue means to be produced; Show that thus the utility model device can simulate oil cargo tank upper deck corrosion condition preferably, can shorten the test period significantly simultaneously, reduce testing expenses.
Table 1 uses the corrosion test result of the utility model device simulation low alloy steel
The corrosion test result of the real ship hanging test of table 2
Table 3 corrosion product is formed (mass percent)
| FeOOH+Fe 4O 3 | Single S | Other | |
| Real ship lacing film | 40.3％ | 25.6％ | 34.1％ |
| The simulation of this test unit | 38.5％ | 27.1％ | 34.4％ |
Claims (7)
1. oil cargo tank upper deck simulative corrosion test device is characterized in that: it comprise by gas line be tightly connected with lower unit: source of the gas feeding unit, flow and specimen temperature control module (4), gas mixed cell (5), corrosion reaction unit (6) and the waste heat recovery unit (7) that can supply many group gases.
2. test unit as claimed in claim 1 is characterized in that: said source of the gas feeding unit comprises at least a in the following gas tank: N
2Supplier tank (1), SO
2+ CO
2+ O
2+ N
2Mixed gas supplier tank (2), and H
2S+N
2Mixed gas supplier tank (3); All gases is exported through flowrate control valve.
3. test unit as claimed in claim 1; It is characterized in that: said gas mixed cell (5) comprises a plurality of air intake openings (8) and a gas outlet (11); Be provided with between air intake opening (8) and gas outlet (11) and mix gas barrier (9); The endpiece that mixes gas barrier (9) connects to vacuum air pump (10), and vacuum air pump (10) joins with gas outlet (11).
4. test unit as claimed in claim 1 is characterized in that: said corrosion reaction unit (6) comprises top board and reactor, and top board is provided with corrosion reaction unit air intake opening (16) and gas outlet (18); Sample (13) is arranged on the top board, and thermometric galvanic couple (15) is connected with sample (13); The top board side is provided with a plurality of airtight fixedly clinchings (12), through airtight fixedly clinching (12) top board is fastened on the reactor; Resistive heater (14) the half unsettled reactor that is built in; Distilled water (17) is equipped with in the reactor below, and the height of this distilled water (17) is through filler (19) control of side, and the reactor outside is provided with the constant temperature water bath device (20) of control distilled water (17) temperature.
5. test unit as claimed in claim 4 is characterized in that: this device also comprises the temperature controller that is used to control the interior sample in corrosion reaction unit (6) day alternates with night temperature variation.
6. test unit as claimed in claim 4 is characterized in that: the liquid level of said distilled water (17) is lower than the height of resistive heater (14), and said air intake opening (16) extends under the liquid level that is immersed in distilled water (17).
7. like claim 1 or 4 described test units, it is characterized in that: said test unit comprises the corrosion reaction unit (21,22,23) of a plurality of series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205594366U CN202486030U (en) | 2011-12-28 | 2011-12-28 | Simulative corrosion tester for upper deck on oil cargo tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205594366U CN202486030U (en) | 2011-12-28 | 2011-12-28 | Simulative corrosion tester for upper deck on oil cargo tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202486030U true CN202486030U (en) | 2012-10-10 |
Family
ID=46960445
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205594366U Expired - Lifetime CN202486030U (en) | 2011-12-28 | 2011-12-28 | Simulative corrosion tester for upper deck on oil cargo tank |
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|---|---|
| CN (1) | CN202486030U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928330A (en) * | 2012-11-09 | 2013-02-13 | 南京钢铁股份有限公司 | Experimental device for simulating corrosion of crude oil tank of goods oil tanker and experimental method of experimental device |
| CN102928331A (en) * | 2012-11-12 | 2013-02-13 | 北京科技大学 | Test system for evaluating corrosivity of steel for upper deck of cargo oil tank of crude oil tanker |
| CN103383339A (en) * | 2013-06-26 | 2013-11-06 | 中国船舶重工集团公司第七二五研究所 | Air-tight test apparatus for coating of cargo oil tank of crude oil tanker |
| CN103411876A (en) * | 2013-08-16 | 2013-11-27 | 山东方圆建筑工程检测中心 | Device for alkali resistance test on alkali-resistant glass fiber gridding cloth |
| CN103776757A (en) * | 2014-01-27 | 2014-05-07 | 钢铁研究总院青岛海洋腐蚀研究所 | Test sample loading device and method for gaseous corrosion under top heat-transferring and temperature-controlling environment |
| CN104596915A (en) * | 2015-01-30 | 2015-05-06 | 钢铁研究总院青岛海洋腐蚀研究所 | Reaction kettle for upper deck simulative corrosion test of oil hold and using method of reaction kettle |
| CN104596914A (en) * | 2015-01-30 | 2015-05-06 | 钢铁研究总院青岛海洋腐蚀研究所 | Outer box body for simulative corrosion test of upper deck of cargo oil tank, and using method of outer box body |
| CN104614307A (en) * | 2015-02-26 | 2015-05-13 | 中国特种设备检测研究院 | Experimental device for simulating hydrochloric acid dew point corrosion |
| CN104614305A (en) * | 2015-01-30 | 2015-05-13 | 钢铁研究总院青岛海洋腐蚀研究所 | Simulation test device for detecting deck steel corrosion resistance on oil cargo tank and use method of simulation test device |
| CN110308087A (en) * | 2019-07-22 | 2019-10-08 | 中国石油大学(北京) | Corrosion experimental device |
-
2011
- 2011-12-28 CN CN2011205594366U patent/CN202486030U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928330A (en) * | 2012-11-09 | 2013-02-13 | 南京钢铁股份有限公司 | Experimental device for simulating corrosion of crude oil tank of goods oil tanker and experimental method of experimental device |
| CN102928331A (en) * | 2012-11-12 | 2013-02-13 | 北京科技大学 | Test system for evaluating corrosivity of steel for upper deck of cargo oil tank of crude oil tanker |
| CN103383339B (en) * | 2013-06-26 | 2015-10-21 | 中国船舶重工集团公司第七二五研究所 | A kind of crude oil tanker oil cargo tank coating air tightness tester |
| CN103383339A (en) * | 2013-06-26 | 2013-11-06 | 中国船舶重工集团公司第七二五研究所 | Air-tight test apparatus for coating of cargo oil tank of crude oil tanker |
| CN103411876A (en) * | 2013-08-16 | 2013-11-27 | 山东方圆建筑工程检测中心 | Device for alkali resistance test on alkali-resistant glass fiber gridding cloth |
| CN103411876B (en) * | 2013-08-16 | 2015-12-09 | 山东方圆建筑工程检测中心 | A kind of alkali resistant fiberglass gridding cloth alkali resistance test device |
| CN103776757A (en) * | 2014-01-27 | 2014-05-07 | 钢铁研究总院青岛海洋腐蚀研究所 | Test sample loading device and method for gaseous corrosion under top heat-transferring and temperature-controlling environment |
| CN103776757B (en) * | 2014-01-27 | 2015-12-09 | 钢铁研究总院青岛海洋腐蚀研究所 | The sample charger of gas attack and method under a kind of tip heat transfer controlled heat environment |
| CN104596915A (en) * | 2015-01-30 | 2015-05-06 | 钢铁研究总院青岛海洋腐蚀研究所 | Reaction kettle for upper deck simulative corrosion test of oil hold and using method of reaction kettle |
| CN104596914A (en) * | 2015-01-30 | 2015-05-06 | 钢铁研究总院青岛海洋腐蚀研究所 | Outer box body for simulative corrosion test of upper deck of cargo oil tank, and using method of outer box body |
| CN104614305A (en) * | 2015-01-30 | 2015-05-13 | 钢铁研究总院青岛海洋腐蚀研究所 | Simulation test device for detecting deck steel corrosion resistance on oil cargo tank and use method of simulation test device |
| CN104614307A (en) * | 2015-02-26 | 2015-05-13 | 中国特种设备检测研究院 | Experimental device for simulating hydrochloric acid dew point corrosion |
| CN104614307B (en) * | 2015-02-26 | 2017-05-31 | 中国特种设备检测研究院 | A kind of experimental provision of analog salt acid dew piont corrosion |
| CN110308087A (en) * | 2019-07-22 | 2019-10-08 | 中国石油大学(北京) | Corrosion experimental device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Advanced Steel Technology Co., Ltd. Assignor: Central Iron & Steel Research Institute Contract record no.: 2014110000019 Denomination of utility model: Simulative corrosion tester for upper deck on oil cargo tank Granted publication date: 20121010 License type: Exclusive License Record date: 20140512 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121010 |