CN105717040A - Clamp device for pipe flow type dynamic galvanic corrosion tests - Google Patents
Clamp device for pipe flow type dynamic galvanic corrosion tests Download PDFInfo
- Publication number
- CN105717040A CN105717040A CN201610212495.3A CN201610212495A CN105717040A CN 105717040 A CN105717040 A CN 105717040A CN 201610212495 A CN201610212495 A CN 201610212495A CN 105717040 A CN105717040 A CN 105717040A
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- China
- Prior art keywords
- end cap
- galvanic corrosion
- insulation sleeve
- left end
- cathode
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- 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.)
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- 238000005260 corrosion Methods 0.000 title claims abstract description 53
- 230000007797 corrosion Effects 0.000 title claims abstract description 52
- 238000012360 testing method Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 238000009413 insulation Methods 0.000 claims description 39
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 3
- 238000011160 research Methods 0.000 abstract description 4
- 239000011810 insulating material Substances 0.000 abstract 2
- 238000005246 galvanizing Methods 0.000 description 7
- 230000003628 erosive effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000013535 sea water Substances 0.000 description 6
- 238000003556 assay Methods 0.000 description 5
- 238000009991 scouring Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000168254 Siro Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005479 sherardizing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
Abstract
The invention relates to a clamp device for pipe flow type dynamic galvanic corrosion tests. The device comprises a left end cover, a right end cover, a cathode insulating sleeve, an anode insulating sleeve and an intermediate insulating sleeve, wherein the intermediate insulating sleeve is located between the cathode insulating sleeve and the anode insulating sleeve, the left end cover and the right end cover are made of insulating materials, a section of threaded pipe is processed on the outer side of each of the left end cover and the right end cover to facilitate connection with an external pipeline, the cathode insulating sleeve and the anode insulating sleeve are made of insulating materials, and tubular samples are mounted in the sleeves. According to the provided clamp device for testing the galvanic corrosion performance in a corrosive medium flowing state, the size of the device can be adjusted according to demands of the research process, and the galvanic corrosion tests can be performed no matter whether the area of the cathode is equal to that of the anode or unequal to that of the anode; the device is simple to operate and convenient to mount and dismount and has a good sealing property, a reliable experimental result and high reproducibility.
Description
Technical field:
The present invention relates to a kind of assay device, be specifically related to a kind of new fluid-guiding type galvanizing corrosion test grip device, for there is the experimental study of galvanic corrosion in especially a kind of dynamic galvanic corrosion test fixture device in solution medium between any two kinds of metal materials.
Background technology:
Metal current material is widely used in the offshore engineering structure field such as boats and ships, harbour, in harsh marine corrosion environment, in order to meet the intensity of component, rigidity and instructions for use, generally requiring the different types of metal material of employing, this will cause the generation of galvanic corrosion.Except galvanic corrosion accelerates the failure except the corrosion that can make anode member, also can induce the generation of the even situation such as the spot corrosion of accelerated stress burn into, crevice corrosion, hydrogen embrittlement, not only result in heavy economic losses, even can produce personnel casualty accidents.For the speed that galvanic corrosion in accurately judgement system occurs, scientific research personnel have developed different types of galvanic corrosion experimental provision.Galvanizing corrosion test great majority in existing laboratory adopt static sea water as corrosive medium, and this assay device is simple, it is easy to accomplish；But real sea Environments glassware for drinking water has certain flow velocity, fluidised form, the extent of corrosion of material much more serious than in static sea water when seawater scouring, static sea water the experimental data obtained is difficult to the real galvanic corrosion tendency of really reflection storeroom and degree；And, in the research process of galvanic corrosion, between material, the area ratio of (anode and cathode) is the key factor affecting galvanic corrosion, but never a kind of can accurately determine that area ratio is to study the assay device of galvanic corrosion；Accordingly, it would be desirable to design a kind of galvanic corrosion can either simulated in dynamic solution environmental, can easily determine again the test fixture device of ratio of cathodic to anodic area.The test method simulating dynamic solution environmental in prior art has rotation to wash away, pipe flow washes away, injecting type washes away, such as patent of invention 201010603782.X " a kind of revolving type experiments device simulating inner-walls of duct erosion corrosion " adopts pie or cylinder shaped test piece, the work surface of sample is towards differing, it is unfavorable for the transmission of Galvanic Current, it is impossible to simulate the fluid axial erosion corrosion behavior along inner-walls of duct well；Patent of invention 200720014413.0 " jetting type liquid-solid double-phase scouring corrosion assay device " and 200810249618.6 " multifunctional base injection type cavitation corrosion test devices " can accurately control to impact the flow velocity of liquid stream, can change the angle of attack washed away, simulation different pressures condition, but actual working conditions can not be simulated well, scouring intensity is bigger than practical situation, has a certain distance with the actual erosion corrosion condition of pump, pipeline.Patent of invention 201310248151.4 " pipe flow type inner wall erosion corrosion test device ", for the sherardizing steel performance of actual tubing is made evaluation, solve the problem that traditional fluid-guiding type erosion-corrosion experiment device construction cost is high, the fluid axial erosion corrosion behavior along inner-walls of duct can be simulated preferably, but the installation of existing fluid-guiding type device sample, dismounting complexity, sample position is not easy to fix, system is unstable, being difficult to control to the area ratio between cathode and anode sample, extraneous factor interference is big.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is proposed that a kind of fluid-guiding type dynamic galvanic corrosion test fixture device.The sample that traditional galvanizing corrosion test exists is installed, dismounting complexity, sample position is not fixed easily, extraneous factor interference is big, the present invention is under self-control flow-type tank Scouring Condition, the fluid-guiding type assay device that galvanic corrosion occurs between a kind of any two kinds of different metal materials is provided, break through the existing limitation that can only carry out galvanizing corrosion test in static sea water, it is achieved under the dynamic environmental conditions of seawater scouring, carry out the galvanic corrosion test between different materials.This device can carry out the identical galvanizing corrosion test with different area ratio of negative and positive area, it is also possible to the galvanic corrosion carrying out identical or different area ratio soaks zero-G test (coutroi velocity is 0m/s).Ratio of cathodic to anodic area inaccuracy when improving conventional galvanizing corrosion test, manufacture working electrode complexity and the unstable situation of test.Test sample used is tubulose, directly installs, and without approved sample, device can directly be connected with galvanic corrosion measuring instrument with metal yin, yang electrode, reference electrode.This invention is simple to operate, convenient disassembly, good airproof performance, and application prospect is extensive.
Technical solution of the present invention is: a kind of fluid-guiding type dynamic galvanic corrosion test fixture device, described device is cylindrical structure, including by left end cap, right end cap, cathode insulation sleeve, anodized insulation sleeve, five parts of intermediate insulation cylinder, each several part is connected and fixed by four fastening screw bolts；The internally installed tubulose sample of cathode and anode insulating sleeve, cathode insulation sleeve, anodized insulation sleeve two ends by gasket seal respectively with left and right end cap and intermediate insulation cylinder compact siro spinning technology, cathode and anode insulating sleeve is respectively inlayed one with the metal electrode of tubulose sample close contact, wire to be drawn on the top of metal electrode and be connected with galvanic corrosion measuring instrument respectively；On intermediate insulation cylinder, processing has reference electrode installing hole, and reference electrode can be zinc bar, two bolts and fixing plate are fixed on intermediate insulation cylinder, and realizes sealing by pad.
The work process of this grip device is as follows: place two tubulose samples in the through hole of cathode and anode insulating sleeve, apply pressure to the left end cap being emitted on both sides and right end cap by four bolts and realize the clamping to two test sample and fixing, finally install metal electrode and reference electrode, be connected with galvanic corrosion measuring instrument by wire；Left and right end cap is connected with outer pipeline, under the dynamic environment of media flow, carries out the galvanic corrosion testing experiment between different materials.
The method have the advantages that
1) according to the needs of research process, plant bulk can be regulated, it is possible to carry out the identical galvanizing corrosion test with different area ratio of anode and cathode area；Tubulose sample directly shapes according to dimensional requirement, and sample non-working surface, inside insulating sleeve, seals reliable, it is not necessary to extra closing and isolation；And reference electrode is fixed in the middle of two samples, can effectively ensure that the accuracy of test data；Additionally sample is connected with galvanic corrosion measuring instrument by metal electrode extraction wire, manufactures working electrode convenient and reliable；And due to the existence of intermediate insulation cylinder, easily two test sample can be fixed on a spacing remaining unchanged accurately.
2) present invention is simple to operate, convenient disassembly, good airproof performance, and cost is low, and result of the test is stable, and repeatability is strong, can be widely applied in experimental study.
Accompanying drawing explanation
The master that Fig. 1 is present clip device looks view in full section；
Fig. 2 is the left view of present clip device；
The master that Fig. 3 is present clip device cathode insulation sleeve looks view in full section；
Fig. 4 is the top view of present clip device intermediate insulation cylinder；
Fig. 5 is present clip device intermediate insulation cylinder sectional view；
Fig. 6 is the top perspective view of the fixing plate of present clip device reference electrode.
In figure: 1, gasket seal I；2, fastening bolt I；3, left end cap；4, metal electrode；5, cathode insulation sleeve；6, intermediate insulation cylinder；7, fastening bolt II；8, fixing plate；9, reference electrode；10, gasket seal II；11, anodized insulation sleeve；12, right end cap；13, wire；14, wire；15, sample one；16, sample two；17, reference electrode installing hole.
Detailed description of the invention:
The implementation process of present clip device is described in detail in conjunction with accompanying drawing.As shown in figs 1 to 6, the main support of experiment device for couple corrosion is four fastening bolts I 2, and bolt is symmetrical, is fixed on the surrounding (Fig. 2) of device；It is shaped with screwed hole, to realize threaded (Fig. 3) with metal electrode above cathode insulation sleeve 5；Intermediate insulation cylinder 6 is oblate tubular (Fig. 4), and length intercepts with the requirement of style 2 16 spacing according to style 1；In the middle part of insulating cylinder, processing has reference electrode installing hole 17, as it is shown in figure 5, bottom shoulder hole height is 3mm, aperture is φ 5mm, can effectively ensure that reference electrode 9 and electrolytical conduction.
Fixture installation process: first left end cap 3 is placed on one end of four fastening bolts I 2；Left side is installed nut and is fixed, gasket seal I 1 is positioned over the groove at left end cap 3 edge, sample 1 is positioned in the through hole of cathode insulation sleeve 5, cathode insulation sleeve 5 edge is made to have one end of gasket seal I 1 steadily to contact with left end cap 3, the other end of cathode insulation sleeve 5 is close to intermediate insulation cylinder 6, and the two ends of contact are sealed by gasket seal I 1；In like manner antianode insulating sleeve 11 and right end cap 12 are installed, and the nut at the two ends that then tight a bolt can complete the installation of major axes orientation.Metal electrode 4 is threadeded with yin, yang class B insulation sleeve, it is ensured that bottom and sample contacts reach conducting, and from metal electrode top extraction electrode wire 13；Reference electrode 9 is sealed by gasket seal II 10, it is fixed in the reference electrode installing hole 17 of intermediate insulation cylinder 6, fastening bolt II 7 is first installed and the fixing plate 8 of electrode is slightly fixed, tighten behind reference electrode 9 top with fixing plate contact surface place extraction electrode wire 14 again, make wire 14 and the close contact of reference electrode 9 top.Reference electrode 9 fixes the screwed hole of plate both sides, symmetrical (Fig. 6).
Finally detect the conduction of yin, yang electrode with circuit tester, just can connect outer pipeline.Outer pipeline can adopt flow-type tank erosion corrosion test device, kinetic pump is placed in tank, it is connected with ventilating water pipe, flow velocity is regulated to meet experimental test requirement by converter, flow velocity can be 0m/s～7m/s, and be monitored by effusion meter, after water flow stationary, connect and often organize galvanic couple to test sample；Pipeline can be sequentially connected with many sets specimen holder device (parallel sample), each device sample different passages by three electrode cable connecting multi-channel galvanic corrosion measuring instruments, test the numerical value of the current potential of each material, coupling potential and coupling electric current and be recorded, then after test to be tested completes, take pictures, clean corrosion product and weigh.
Claims (2)
1. a fluid-guiding type dynamic galvanic corrosion test fixture device, described grip device is cylindrical structure, it is characterized in that: include left end cap, right end cap, cathode insulation sleeve, anodized insulation sleeve and intermediate insulation cylinder, intermediate insulation cylinder is between cathode insulation sleeve and anodized insulation sleeve, described left end cap and right end cap adopt insulant to process, one section of corrugated tubing is respectively processed in the outside of left end cap and right end cap, to facilitate the connection with external pipe, described cathode insulation sleeve and anodized insulation sleeve adopt insulant to process, sleeve inner installs tubulose sample, bolt is airtight with left end cap is connected by gasket seal and fastening for the left end of described cathode insulation sleeve, its right-hand member is connected by described gasket seal is airtight with intermediate insulation cylinder, bolt is airtight with right end cap is connected by described gasket seal and fastening for the right-hand member of described anodized insulation sleeve, its left end is connected by described gasket seal is airtight with intermediate insulation cylinder, respectively inlaying one on described cathode insulation sleeve and anodized insulation sleeve can with the metal electrode of tubulose sample close contact, the other end on metal electrode is connected with outside galvanic corrosion measuring instrument respectively by a wire.
2. fluid-guiding type dynamic galvanic corrosion test fixture device according to claim 1, it is characterized in that: on intermediate insulation cylinder, processing has reference electrode installing hole, reference electrode installing hole is provided with reference electrode, reference electrode is fixed on intermediate insulation cylinder by two bolts and fixing plate, and realizes sealing by pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610212495.3A CN105717040B (en) | 2016-04-07 | 2016-04-07 | A kind of fluid-guiding type dynamic galvanic corrosion test fixture device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610212495.3A CN105717040B (en) | 2016-04-07 | 2016-04-07 | A kind of fluid-guiding type dynamic galvanic corrosion test fixture device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105717040A true CN105717040A (en) | 2016-06-29 |
| CN105717040B CN105717040B (en) | 2018-08-10 |
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| CN201610212495.3A Expired - Fee Related CN105717040B (en) | 2016-04-07 | 2016-04-07 | A kind of fluid-guiding type dynamic galvanic corrosion test fixture device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192663A (en) * | 2017-07-25 | 2017-09-22 | 广东电网有限责任公司电力科学研究院 | A kind of test system for evaluating the powered military service performance of isolation switch contact material |
| CN108680494A (en) * | 2018-06-28 | 2018-10-19 | 天津市澳玛科技开发有限公司 | Food-grade tinplate inner coating corrosion resistance detection method and its detection device |
| CN113029931A (en) * | 2021-05-06 | 2021-06-25 | 中国船舶重工集团公司第七二五研究所 | Multi-working-condition galvanic corrosion test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107192663A (en) * | 2017-07-25 | 2017-09-22 | 广东电网有限责任公司电力科学研究院 | A kind of test system for evaluating the powered military service performance of isolation switch contact material |
| CN107192663B (en) * | 2017-07-25 | 2023-04-25 | 广东电网有限责任公司电力科学研究院 | Test system for evaluating electrified service performance of disconnecting switch contact material |
| CN108680494A (en) * | 2018-06-28 | 2018-10-19 | 天津市澳玛科技开发有限公司 | Food-grade tinplate inner coating corrosion resistance detection method and its detection device |
| CN108680494B (en) * | 2018-06-28 | 2024-03-26 | 天津市澳玛科技开发有限公司 | Method and device for detecting corrosion resistance of food-grade tinplate inner coating |
| CN113029931A (en) * | 2021-05-06 | 2021-06-25 | 中国船舶重工集团公司第七二五研究所 | Multi-working-condition galvanic corrosion test device |
| CN113029931B (en) * | 2021-05-06 | 2023-02-21 | 中国船舶重工集团公司第七二五研究所 | Multi-working-condition galvanic corrosion test device |
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| CN105717040B (en) | 2018-08-10 |
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