CN103234893B - A kind of metal material galvanic couple corrosion test grip device - Google Patents
A kind of metal material galvanic couple corrosion test grip device Download PDFInfo
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- CN103234893B CN103234893B CN201310132133.XA CN201310132133A CN103234893B CN 103234893 B CN103234893 B CN 103234893B CN 201310132133 A CN201310132133 A CN 201310132133A CN 103234893 B CN103234893 B CN 103234893B
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Abstract
A fixture for metal material galvanic couple corrosion test, belongs to experimental provision and method and technology field.This fixture comprises primary clamp body clamp body (8) and collets one (2), collets two (3), collets three (4) three collets, three collets are compressed the fixture forming galvanizing corrosion test by primary clamp body clamp body (8), described primary clamp body clamp body (8) there is a rectangular parallelepiped groove, three collets yi word patterns are arranged and puts into described rectangular parallelepiped groove; Described primary clamp body clamp body (8) has the through hole of two hollow outs in the bottom surface of the rectangular parallelepiped groove placing collets, for passing two test sample; Described three collets shape of cross section sizes are the same with the shape of cross section size of the rectangular parallelepiped groove of primary clamp body clamp body, for clamp assay sample between three collets.The invention provides a kind of fixture that effectively can reduce extraneous factor and metal material galvanic couple corrosion test is affected, there is reliability strong, simple to operate, improve the advantage of the precision successful of test.
Description
Technical field
The present invention relates to a kind of fixture, particularly relate to the fixture of metal material galvanic couple corrosion test, the invention belongs to experimental provision and method and technology field.
Background technology
Bimetallic corrosion has electrical contact to be formed due to the discrepant metal of electrochemical properties in electrolyte solution.And the corrosion cathode and anode that form different due to the discrepant corrosion of metal current potential of electrochemical properties, between cathode and anode, have current flowing, the dissolving metal speed making current potential lower increases, and the higher dissolving metal speed of current potential reduces on the contrary.Bimetallic corrosion is except except the corrosion speed of accelerating anode component, also can bringing out the more dangerous corrosion failure such as spot corrosion, crevice corrosion and stress corrosion.This potential monkey wrench of bimetallic corrosion threatens the global reliability of many structural facilities in real life, is one of maximum potential safety hazard.Carry out galvanizing corrosion test, the bimetallic corrosion characteristic understood between different materials has important directive significance for the method choosing corrosion protection and prevention accurately.
The galvanizing corrosion test of metal material is a kind of technology for measuring the bimetallic corrosion character between different metal.Test metal is prepared into standard sample by national standard, then will carries out circuit connection and corrosion protection to the part that sample has neither part nor lot in corrosion, finally sample being started galvanizing corrosion test by being immersed in electrolyte solution to determining deviation.In whole process, sample may cause the principal element of test findings error in having neither part nor lot in the protection of erodable section corrosion and the spacing of sample and external circuit and the factor such as the circuit of sample is connected tests, for reducing these factors to greatest extent to testing the error brought, the grip device of galvanizing corrosion test serves key effect.
The factor affecting stringency of test in the process of carrying out galvanizing corrosion test is a lot, and very complicated, and these factors mainly contain:
(1), test sample has neither part nor lot in the corrosion protection of erodable section.The basic demand of bimetallic corrosion ensures that the change of sample in whole process of the test is all because bimetallic corrosion causes, the part that sample has neither part nor lot in corrosion will be protected like this, to ensure in whole experimentation that this part is in sealing state and any change does not occur;
(2), the control of test sample spacing.The spacing of test sample is one of principal element affecting bimetallic corrosion, and the different corrosion rate of spacing is different.Spacing that sample ensures them to be located accurately accurately and immobilize in whole process of the test;
(3), the reliability that is connected with test sample circuit of external circuit.The external circuit that galvanizing corrosion test connects sample is conducting state, this changes with regard to requiring the circuit connecting section of external circuit and test sample to divide will reliably and not to occur to corrode, therefore the connection of external circuit and test sample can not occur loosening or virtual connection also will carry out corrosion protection simultaneously in whole process of the test.
Summary of the invention
The present invention completes to improve the operation of test accuracy short form test.The object of this invention is to provide a kind of fixture of metal material galvanic couple corrosion test, avoid the impact of other influence factor around, improve the precision of test, short form test operates.
For achieving the above object, this invention takes following technical scheme:
A fixture for metal material galvanic couple corrosion test, this fixture comprises primary clamp body clamp body 8 and collets 1, collets 23, collets 34; Collets 1, collets 23, collets 34 are compressed the fixture forming galvanizing corrosion test by primary clamp body clamp body 8, described primary clamp body clamp body 8 have a rectangular parallelepiped groove, are arranged by three collets yi word patterns and put into described rectangular parallelepiped groove; Described primary clamp body clamp body 8 has the through hole of two hollow outs in the bottom surface of the rectangular parallelepiped groove placing collets, for passing two test sample; Described three collets shape of cross section sizes are the same with the shape of cross section size of the rectangular parallelepiped groove of primary clamp body clamp body, for clamp assay sample between collets 1, collets 23, collets 34.
The course of work of this device is as follows: the wire respectively putting into a test sample and a band conductive metal sheet in two gaps between three collets, applies pressure realize the clamping of two test sample and fixing by the bolt of two in primary clamp body clamp body to the collets one and collets three that are emitted on both sides.Rear the part that test sample has neither part nor lot in corrosion to be sealed paraffin melting.
Described primary clamp body clamp body 8 is being provided with two bolts 5 along the direction of three collets discharges, bolt 5 can screw in the groove of placement collets through the sidewall of primary clamp body clamp body 8, bolt 5, for compressing collets and being placed in the test sample between two collets, realizes primary clamp body clamp body 8 and three collets is compressed the fixture forming galvanizing corrosion test.
In described primary clamp body clamp body 8, the through hole of rectangular parallelepiped groove floor two hollow outs is parallel to each other and spacing is 20mm, and the through hole of each hollow out is being 25mm along the span of three collets emission directions.
Described primary clamp body clamp body 8 is parallel on the sidewall of three collets of yi word pattern discharge, and has a through hole perpendicular to the emission direction of collets, and this through hole is used for hanging and fixing primary clamp body clamp body in process of the test.
Described primary clamp body clamp body 8 hang in process of the test and fixing primary clamp body clamp body through hole directly over a bolt 6 be installed screw in this through hole for primary clamp body clamp body 8 is fixed on testing table.
Described collets 1, collets 23, collets 343 collets are made by tempered glass.
The end face that described collets 1, collets 34 contact with test sample 1 is the arc surface of evagination, and the end face contacted with horizontal hold-down bolt 5 is plane, and the arc surface peak of evagination is 10mm to the distance of end face corresponding thereto.
Two end faces that described collets 23 contact with test sample are plane, and its length is two test sample spacing.
The present invention can obtain following beneficial effect:
1, two test sample can be clamped and fastened on a certain spacing accurately and remain unchanged by the present invention easily.
2, the present invention achieves test sample while to specimen holder and is connected with the reliable circuit of external circuit, without the need to the independent connection carrying out sample and external circuit.
3, the present invention has neither part nor lot in erodable section to test sample and can carry out reliably sealing easily, here especially while warranty test sample is reliably connected with external circuit, complete sealing at the position that test sample is connected with external circuit, the better like this position that ensure that test sample has neither part nor lot in corrosion is in sealing state completely and any change does not occur.
Accompanying drawing explanation
Fig. 1 is metal material galvanic couple corrosion test fixture schematic diagram of the present invention.
Fig. 2 is the complete section front view of metal material galvanic couple corrosion test fixture primary clamp body clamp body of the present invention.
Fig. 3 is the vertical view of metal material galvanic couple corrosion test fixture primary clamp body clamp body of the present invention.
Fig. 4 is the complete section left view of metal material galvanic couple corrosion test fixture primary clamp body clamp body of the present invention.
Fig. 5 is the oblique view that metal material galvanic couple corrosion test fixture of the present invention is positioned over the collets two between two test sample.
Fig. 6 is the front view that metal material galvanic couple corrosion test fixture of the present invention is positioned over the collets one between sample and horizontal hold-down bolt.
Fig. 7 is the front view that metal material galvanic couple corrosion test fixture of the present invention is positioned over the collets three between sample and horizontal hold-down bolt.
In figure: 1, test sample, 2, collets one, 3, collets two, 4, collets three, 5, horizontal hold-down bolt, 6, vertically hold-down bolt, 7, the wire of band conductive metal sheet, 8, primary clamp body clamp body
Embodiment
Below in conjunction with Structure Figure, the fixture of this metal material galvanic couple corrosion test and the side that utilizes fixture to carry out metal material galvanic couple corrosion test are described in further detail.
Fig. 1 is the grip device operating diagram of metal material galvanic couple corrosion test.First the length of collets 23 is truncated to two sample spacing sizes of testing requirements, and collets 23 are placed in the intermediate supports groove of primary clamp body clamp body 8.Two test sample 1 to be extend in groove that primary clamp body clamp body 8 places collets respectively by the through hole of two hollow outs of bottom surface and contacts with collets 23 two ends phase equilibrium.The arc surface of evagination according to the one end with sample contacts by collets 1, collets 34, the one end contacted with horizontal hold-down bolt is that the placement direction of plane is placed in the rectangular parallelepiped groove of the primary clamp body clamp body between sample 1 and horizontal hold-down bolt 5, slightly tighten two horizontal hold-down bolts 5, make collets 22, the arc surface of collets 34 contacts with test sample.The conductive metal sheet of wire 7 of band conductive metal sheet is placed between collets 22, the peak of arc surface of collets 34 and test sample 1, then horizontal hold-down bolt 5 is tightened, ensure that conductive metal sheet reliably contacts with test sample, in the process of tightening horizontal hold-down bolt 5, want the position of attentional manipulation test sample 1 in the through hole of primary clamp body clamp body hollow out and warranty test sample 1 not to have with primary clamp body clamp body 8 anyly contact and keep suitable distance to be advisable.Pour into after being dissolved by paraffin in the through hole of the hollow out of two placement test sample 1 in primary clamp body clamp body, part test sample being had neither part nor lot in corrosion seals, and this part sealing comprises the test sample extended to outside primary clamp body clamp body 8.The principle of sealing is that the corroded area ratio that specifies of warranty test and the sealing area size of test sample that extends to outside primary clamp body clamp body 8 meet the domain of walker of liquid level accurately.After carrying out sealing, test sample is immersed in electrolytic solution, be fixed by the manhole in primary clamp body clamp body 8 centre position and vertical hold-down bolt 6 after adjusting the submergence of sample, just can carry out galvanizing corrosion test.
Claims (5)
1. the fixture of a metal material galvanic couple corrosion test, this fixture comprises primary clamp body clamp body (8) and collets one (2), collets two (3), collets three (4) three collets, it is characterized in that: collets one (2), collets two (3), collets three (4) are compressed the fixture forming galvanizing corrosion test by primary clamp body clamp body (8), described primary clamp body clamp body (8) there is a rectangular parallelepiped groove, three collets yi word patterns are arranged and puts into described rectangular parallelepiped groove; Described primary clamp body clamp body (8) has the through hole of two hollow outs in the bottom surface of the rectangular parallelepiped groove placing collets, for passing two test sample; Described three collets shape of cross section sizes are the same with the shape of cross section size of the rectangular parallelepiped groove of primary clamp body clamp body, for clamp assay sample between collets one (2), collets two (3), collets three (4); Described primary clamp body clamp body (8) is being provided with two bolts (5) along the direction of three collets discharges, bolt (5) can screw in the groove of placement collets through the sidewall of primary clamp body clamp body (8), bolt (5), for compressing collets and being placed in the test sample between two collets, realizes primary clamp body clamp body (8) and three collets is compressed the fixture forming galvanizing corrosion test; The through hole of upper rectangular parallelepiped groove floor two hollow outs of described primary clamp body clamp body (8) is parallel to each other and spacing is 20mm, and the through hole of each hollow out is being 25mm along the span of three collets emission directions; Described primary clamp body clamp body (8) is parallel on the sidewall of three collets of yi word pattern discharge, and has a through hole perpendicular to the emission direction of collets, and this through hole is used for hanging and fixing primary clamp body clamp body in process of the test.
2. the fixture of a kind of metal material galvanic couple corrosion test according to claim 1, is characterized in that: described primary clamp body clamp body (8) hang in process of the test and fixing primary clamp body clamp body through hole directly over a bolt (6) be installed screw in this through hole for primary clamp body clamp body (8) is fixed on testing table.
3. the fixture of a kind of metal material galvanic couple corrosion test according to claim 1, is characterized in that: described collets one (2), collets two (3), collets three (4) three collets are made by tempered glass.
4. the fixture of a kind of metal material galvanic couple corrosion test according to claim 1, it is characterized in that: the end face that described collets one (2), collets three (4) contact with test sample (1) is the arc surface of evagination, the end face contacted with horizontal hold-down bolt (5) is plane, and the arc surface peak of evagination is 10mm to the distance of end face corresponding thereto.
5. the fixture of a kind of metal material galvanic couple corrosion test according to claim 1, is characterized in that: two end faces that described collets two (3) contact with test sample are plane, and its length is two test sample spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310132133.XA CN103234893B (en) | 2013-04-16 | 2013-04-16 | A kind of metal material galvanic couple corrosion test grip device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310132133.XA CN103234893B (en) | 2013-04-16 | 2013-04-16 | A kind of metal material galvanic couple corrosion test grip device |
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| Publication Number | Publication Date |
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| CN103234893A CN103234893A (en) | 2013-08-07 |
| CN103234893B true CN103234893B (en) | 2015-10-28 |
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| CN201310132133.XA Expired - Fee Related CN103234893B (en) | 2013-04-16 | 2013-04-16 | A kind of metal material galvanic couple corrosion test grip device |
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|---|---|---|---|---|
| CN103604740B (en) * | 2013-11-14 | 2016-06-29 | 国家电网公司 | Based on the electrochemical measuring method that transmission line of electricity is online |
| CN103604741B (en) * | 2013-11-14 | 2016-09-14 | 国家电网公司 | Electrolytic cell assembly based on the online electrochemical measurement of transmission line of electricity |
| CN103884639B (en) * | 2014-04-10 | 2016-08-24 | 北京科技大学 | The experimental technique of a kind of dynamic analog underdeposit corrosion and device thereof |
| CN105717040B (en) * | 2016-04-07 | 2018-08-10 | 青岛科技大学 | A kind of fluid-guiding type dynamic galvanic corrosion test fixture device |
| CN106198374B (en) * | 2016-06-24 | 2020-03-24 | 西南石油大学 | Electrode for high-temperature high-pressure galvanic corrosion electrochemical test and application thereof |
| CN106501162B (en) * | 2016-11-02 | 2019-07-26 | 西南石油大学 | A kind of high temperature and pressure dynamic galvanic corrosion experimental method and device |
| CN108535328A (en) * | 2018-03-12 | 2018-09-14 | 重庆大学 | Insulating oil sulfur corrosion quantitative testing device based on balanced bridge and method |
| CN111579471A (en) * | 2020-05-27 | 2020-08-25 | 中国石油天然气集团有限公司 | Device and method for testing corrosion performance of material under stress and gap action |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3476222A (en) * | 1967-04-01 | 1969-11-04 | Teves Gmbh Alfred | Disk brake with galvanic corrosion protection |
| CN101923042A (en) * | 2010-07-08 | 2010-12-22 | 中国船舶重工集团公司第七二五研究所 | Test method for simulating couple corrosion in seawater scouring environment |
| CN102072873A (en) * | 2009-11-25 | 2011-05-25 | 中国石油天然气集团公司 | Experiment device for couple corrosion |
| CN202166601U (en) * | 2011-07-06 | 2012-03-14 | 北京有色金属研究总院 | Couple pair hanging device for couple corrosion test |
| CN202661438U (en) * | 2012-06-29 | 2013-01-09 | 邢士波 | Simple electrochemical test fixture |
-
2013
- 2013-04-16 CN CN201310132133.XA patent/CN103234893B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3476222A (en) * | 1967-04-01 | 1969-11-04 | Teves Gmbh Alfred | Disk brake with galvanic corrosion protection |
| CN102072873A (en) * | 2009-11-25 | 2011-05-25 | 中国石油天然气集团公司 | Experiment device for couple corrosion |
| CN101923042A (en) * | 2010-07-08 | 2010-12-22 | 中国船舶重工集团公司第七二五研究所 | Test method for simulating couple corrosion in seawater scouring environment |
| CN202166601U (en) * | 2011-07-06 | 2012-03-14 | 北京有色金属研究总院 | Couple pair hanging device for couple corrosion test |
| CN202661438U (en) * | 2012-06-29 | 2013-01-09 | 邢士波 | Simple electrochemical test fixture |
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| CN103234893A (en) | 2013-08-07 |
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Granted publication date: 20151028 Termination date: 20180416 |