CN104266909A - Corrosion experimental device for metal material under constant stress action - Google Patents
Corrosion experimental device for metal material under constant stress action Download PDFInfo
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- CN104266909A CN104266909A CN201410547800.5A CN201410547800A CN104266909A CN 104266909 A CN104266909 A CN 104266909A CN 201410547800 A CN201410547800 A CN 201410547800A CN 104266909 A CN104266909 A CN 104266909A
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Abstract
The invention relates to a corrosion experimental device for a metal material under the constant stress action. The corrosion experimental device is characterized by comprising a rotatable disc, an upper stretching rod, an upper support platform, a lower stretching rod, a lower support platform, a bracket, a corrosion solution container, a ventilating and exhaust device, a gas pressure probe level control system, an electrochemical measurement electrode, a hydraulic cylinder, a stress numerical value display system and a deformation measuring meter. By means of the design, the corrosion environment can be controlled, the control is simple and convenient, the cost is low, and stress and dependent variable can be accurately measured and controlled.
Description
Technical field
The design relates to the corrosion experimental device of metal material under a kind of constant action of pulling stress, belongs to corrosion and protection, material failure and analysis technical field.
Background technology
Stress and corrosive medium have significant cooperative effect, and under both couplings, the corrosion failure of metal material understands obviously aggravation, and therefore clear and definite stress and corrosive medium act synergistically the corrosion characteristics, failure regularity etc. of metal material to have important scientific meaning.Add stress to metal material and be the key of carrying out related experiment by stress and corrosive medium acting in conjunction in metal material, but specialized stress etching experiment device is expensive, and the C type ring experiment etc. of routine can accurately not measure stress, the strain value of sample, be unfavorable for that clear and definite stress and corrosive medium act synergistically failure characteristics and the rule of material.Therefore, develop can effectively measure sample stress, strain regime cheap experimental provision significant to extensively carrying out the act synergistically failure analysis of lower material of stress and corrosive medium.
Summary of the invention
For the deficiencies in the prior art, the target of the design is to provide the corrosion experimental device of metal material under a kind of constant action of pulling stress, by hydraulic system to sample load application, can realize the accurate control of counter stress, strain; By ventilation, exhaust system and gas pressure monitor system, the oxygen in etchant solution can be discharged, and to CO in container
2, H
2the dividing potential drop of corrosive gas medium such as S accurately controls.
For achieving the above object, the design is realized by following technological means:
The corrosion experimental device of metal material under a kind of constant action of pulling stress, it is characterized in that: comprise rotatable circular disc, pull-up boom, upper brace table, drop-down boom, lower support platform, support, etchant solution container, logical exhaust apparatus, gaseous tension probe level control system, electrochemical measuring electrode, hydraulic jack, stress numerical display system, distortion measurement instrument;
Described etchant solution container is spherical shaped transparent glass steel container, is provided with two rotational symmetry sample openings, air-breather interface, exhaust apparatus interface, auxiliary electrode interface, contrast electrode interface and gas pressure probes and control system at described etchant solution container; Described sample openings, air-breather interface, exhaust apparatus interface, auxiliary electrode and interface, contrast electrode interface rubber stopper and silica gel sealing, at described air-breather interface, exhaust apparatus interface, logical exhaust apparatus is installed, at described auxiliary electrode interface, contrast electrode interface, auxiliary electrode and contrast electrode composition electrochemical measuring electrode is installed; Described support is umbrella, described upper brace table is connected to cradle top, described lower support platform is connected to mid-stent, described drop-down boom is connected on described lower support platform in the mode be threaded, described upper brace table is provided with circular hole, hydraulic jack urceolus is welded in the circular hole of brace table, described rotatable disc is fixedly connected with hydraulic jack inner core, described pull-up boom is connected on described rotatable disc in the mode be threaded, and the center of circle of described pull-up boom, drop-down boom, upper brace table circular hole is located along the same line; Be provided with the notch connecting stress corrosion sample at the free end of described pull-up boom, drop-down boom, stress corrosion sample runs through described sample openings and is connected on notch;
Described hydraulic jack is also provided with hydraulic oil pumping interface and stress numerical display system, hydraulic jack and oil drum are linked by hydralic hose by hydraulic oil pumping interface, described oil drum is provided with hand-hydraulic control lever, at the stiff end of manual manipulation bar, pointer is set, index dial is fixed at the rotation axis place of manual manipulation bar, pointer and index dial composition distortion measurement instrument, be converted into the deformation quantity of test button, realize the monitoring of counter stress corrosion sample deformation quantity by the rotational angle of manual manipulation bar.
Further:
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, is characterized in that: to be the gradient be described lower support platform that the taper of 10 degree is domatic.
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, it is characterized in that: the width of rebate of the free end of described upper brace table, lower support platform is 5mm, the degree of depth is 40mm, and perpendicular to processing the through circular hole that two diameters are 6mm in the plane of notch.
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, is characterized in that: described stress corrosion sample pin is connected on the notch of described pull-up boom, drop-down boom by through circular hole.
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, is characterized in that: have certain gap between described hydraulic jack urceolus and hydraulic jack inner core.
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, is characterized in that: the material of described pull-up boom, drop-down boom, upper brace table, lower support platform is stainless steel.
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, is characterized in that: the diameter of described upper brace table is 200mm, and the diameter of lower support platform is 300mm.
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, is characterized in that: described support is three, is distributed on brace table, lower support platform circumferentially.
The invention has the beneficial effects as follows: the control that can realize corrosion environment, this experimental provision discharges the oxygen in etchant solution, in conjunction with CO in gas pressure monitoring and the adjustable container of control system by air-breather
2, H
2the dividing potential drop of corrosive gas medium such as S, and then accurate control corrosion rate environment; Control simple and convenient, this experimental provision only needs with pin fixing metal sample, and sample is easy for installation, and this device manually hydraulic control lever can realize the loading to test button; With low cost, this experimental provision structure is simple, and with low cost, relative to the stress loading instrument of specialty, this experimental provision cost has significant cost advantage, and it can realize counter stress, the accurate measurement of dependent variable and control simultaneously.
Accompanying drawing explanation
Fig. 1 is the design's general structure composition schematic diagram, and Fig. 2 is etchant solution structure of container schematic diagram, and Fig. 3 is the wiring layout schematic diagram of drop-down boom and lower support platform, and Fig. 4 is the distortion measurement instrument structural representation at manual manipulation bar rotation axis place.
The implication of drawing reference numeral is as follows: 1-rotatable disc, 2-pull-up boom, the upper brace table of 3-, the drop-down boom of 4-, 5-lower support platform, 6-support, pin installed by 7-sample, 8-stress corrosion sample, 9-etchant solution container, 10-hydraulic jack urceolus, 11-hydraulic jack inner core, 12-hydraulic oil pumping interface, 13-auxiliary electrode and interface, 14-air-breather interface, 15-sample openings, 16-contrast electrode interface, 17-exhaust apparatus interface, 18-gaseous tension probe and control system, 19-oil drum, 20-index dial, 21-hand-hydraulic control lever, 22-pointer.
Embodiment
Below in conjunction with Figure of description, design is further described.
As shown in Figure 1, a corrosion experimental device for metal material under constant action of pulling stress, is characterized in that: comprise rotatable circular disc 1, pull-up boom 2, upper brace table 3, drop-down boom, lower support platform 5, support 6, etchant solution container 9, logical exhaust apparatus, gaseous tension probe level control system 18, electrochemical measuring electrode, hydraulic jack, stress numerical display system, distortion measurement instrument;
Described etchant solution container 9 is spherical shaped transparent glass steel container, two rotational symmetry sample openings 15 are provided with at described etchant solution container 9, air-breather interface 14, exhaust apparatus interface 17, auxiliary electrode interface 13, contrast electrode interface 16 and gas pressure probe level control system 18, described sample openings 15, air-breather interface 14, exhaust apparatus interface 17, auxiliary electrode and interface 13, contrast electrode interface 16 rubber stopper and silica gel sealing, at described air-breather interface 14, exhaust apparatus interface 17 is provided with logical exhaust apparatus, at described auxiliary electrode interface 13, contrast electrode interface 16 is provided with auxiliary electrode and contrast electrode composition electro-chemical measuring apparatus, described support 6 is in umbrella, described upper brace table 3 is connected to support 1 top, described lower support platform 5 is connected in the middle part of support 1, described drop-down boom 4 is connected on described lower support platform 5 in the mode be threaded, described upper brace table 3 is provided with circular hole, hydraulic jack urceolus 10 is welded in the circular hole of brace table 3, described rotatable disc 1 is fixedly connected with hydraulic jack inner core 11, described pull-up boom 2 to be connected on described rotatable disc 1 in the mode be threaded, and the center of circle of described pull-up boom 2, drop-down boom 4, upper brace table 3 circular hole is located along the same line, be provided with the notch connecting stress corrosion sample 8 at the free end of described pull-up boom 2, drop-down boom 4, stress corrosion sample 8 runs through described sample openings 15 and is connected on notch,
Described hydraulic jack is also provided with hydraulic oil pumping interface 12 and stress numerical display system, hydraulic jack and oil drum are linked by hydralic hose by hydraulic oil pumping interface 12, described oil drum is provided with hand-hydraulic control lever 21, at the stiff end of manual manipulation bar 21, pointer 22 is set, index dial 20 is fixed at the rotation axis place of manual manipulation bar, pointer 22 and index dial 20 form distortion measurement instrument, the rotational angle of manual manipulation bar 21 is converted into the deformation quantity of test button, realizes the monitoring of counter stress corrosion sample 8 deformation quantity.
Implementation process is as follows: stress corrosion sample 8 one end is through the rubber stopper of sample openings 15, with the gap of silica gel sealing stress corrosion sample 8 with rubber stopper, then rubber stopper is assemblied on etchant solution container 9 sample openings 15, also uses silica gel sealing stress corrosion sample 8 and rubber stopper gap at the other end assembling rubber stopper of stress corrosion sample 8.
Rotate pull-up boom 2 and drop-down boom 4 respectively, make the notch of two stretching bars at same plane, and the circular hole that in two notches, position of opening and stress corrosion sample 8 are opened aligns, with pin, stress corrosion sample 8 upper and lower side is locked on pull-up boom 2 and drop-down boom 4 respectively.
Pull-up boom 2 is fixed on rotatable disc 1 center by screw thread, and drop-down boom 4 is fixed on lower support platform 5 center with screw thread, regulates height and notch position with erection stress corrosion sample 8 by the rotation of upper and lower stretching bar.
Hydraulic jack and oil drum are linked by hydralic hose by hydraulic oil pumping interface 12, the manually lifting of the operating hydraulically operated oil cylinder inner core 11 of hydraulic control bar 21.This experimental provision drives the motion of rotatable disc 1 in the vertical direction by moving up and down of hydraulic jack inner core 11, and then drives moving up and down of pull-up boom 2, applies tension and unloading to realize counter stress corrosion sample 8.
Hydraulic jack, oil drum, hand-hydraulic control lever 21, stress numerical display system etc. are the basic building block of prior art anchor rod drawing instrument, realize corresponding function by anchor rod drawing instrument.Fix a pointer 22 at the stiff end place of the hand-hydraulic control lever 21 of anchor rod drawing instrument, fix the index dial 20 of a concentric at the rotation axis place of hand-hydraulic control lever 21.By the relation in the test calibration rotational angle of control lever and hydraulic jack between bucket lifting distance, after will calibrate, interior bucket lifting distance demarcation is at the corresponding rotational angle place of index dial.Close hydraulic system unloader, manually hydraulic operation pole pair test button load application, the stress that the display of stress numerical display system applies corrosion sample 8, the deflection of distortion measurement instrument display corrosion sample 8, realizes the monitoring of counter stress corrosion sample 8 deformation quantity.
Etchant solution container 9 has leakproofness, can pass into the oxygen in suitable air scavenge solution through air-breather.
By logical exhaust apparatus and gas pressure probe level control system 18, can to CO in etchant solution container 9
2, H
2the dividing potential drop of corrosive gas medium such as S regulates.
By auxiliary electrode and contrast electrode, electrochemical measurement can be carried out to the corrosion characteristics of the stress corrosion sample 8 bearing tension.
Further:
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, is characterized in that: described lower support platform 5 for the gradient be that the taper of 10 degree is domatic.
Etchant solution can flow down automatically, and the corrosive solution in minimizing experimentation is to the corrosion of experimental provision.
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, it is characterized in that: the width of rebate of the free end of described upper brace table 3, lower support platform 5 is 5mm, the degree of depth is 40mm, and perpendicular to processing the through circular hole that two diameters are 6mm in the plane of notch.
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, is characterized in that: described stress corrosion sample 8 pin is connected on the notch of described pull-up boom 2, drop-down boom 4 by through circular hole.
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, is characterized in that: have certain gap between described hydraulic jack urceolus 10 and hydraulic jack inner core 11.
Have enough gaps between hydraulic jack urceolus and inner core, when opening hydraulic system unloader, this device can automatic deloading rapidly.
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, is characterized in that: the material of described pull-up boom 2, drop-down boom 4, upper brace table 3, lower support platform 5 is stainless steel.
Stainless steel increases the corrosion resistance of experimental provision.
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, is characterized in that: the diameter of described upper brace table 3 is 200mm, and the diameter of lower support platform 5 is 300mm.
The corrosion experimental device of metal material under described a kind of constant action of pulling stress, is characterized in that: described support 6 is three, is distributed on brace table 3, lower support platform 5 circumferentially.
Triangle increases the stability of device.
More than show and describe the ultimate principle of the design, principal character and advantage.The technician of the industry should understand; the design is not restricted to the described embodiments; the principle that the design is just described described in above-described embodiment and instructions; under the prerequisite not departing from the design's spirit and scope; the design also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the design.The claimed scope of the design is defined by appending claims and equivalent thereof.
Claims (8)
1. the corrosion experimental device of metal material under a constant action of pulling stress, it is characterized in that: comprise rotatable circular disc, pull-up boom, upper brace table, drop-down boom, lower support platform, support, etchant solution container, logical exhaust apparatus, gaseous tension probe level control system, electrochemical measuring electrode, hydraulic jack, stress numerical display system, distortion measurement instrument;
Described etchant solution container is spherical shaped transparent glass steel container, two rotational symmetry sample openings are provided with at described etchant solution container, air-breather interface, exhaust apparatus interface, auxiliary electrode interface, contrast electrode interface and gas pressure probe level control system, described sample openings, air-breather interface, exhaust apparatus interface, auxiliary electrode and interface, contrast electrode interface rubber stopper and silica gel sealing, at described air-breather interface, exhaust apparatus interface is provided with logical exhaust apparatus, at described auxiliary electrode interface, contrast electrode interface is provided with auxiliary electrode and contrast electrode composition electrochemical measuring electrode, described support is umbrella, described upper brace table is connected to cradle top, described lower support platform is connected to mid-stent, described drop-down boom is connected on described lower support platform in the mode be threaded, described upper brace table is provided with circular hole, hydraulic jack urceolus is welded in the circular hole of brace table, described rotatable disc is fixedly connected with hydraulic jack inner core, described pull-up boom is connected on described rotatable disc in the mode be threaded, and the center of circle of described pull-up boom, drop-down boom, upper brace table circular hole is located along the same line, be provided with the notch connecting stress corrosion sample at the free end of described pull-up boom, drop-down boom, stress corrosion sample runs through described sample openings and is connected on notch,
Described hydraulic jack is also provided with hydraulic oil pumping interface and stress numerical display system, hydraulic jack and oil drum are linked by hydralic hose by hydraulic oil pumping interface, described oil drum is provided with hand-hydraulic control lever, at the stiff end of manual manipulation bar, pointer is set, index dial is fixed at the rotation axis place of manual manipulation bar, pointer and index dial composition distortion measurement instrument, be converted into the deformation quantity of test button, realize the monitoring of counter stress corrosion sample deformation quantity by the rotational angle of manual manipulation bar.
2. the corrosion experimental device of metal material under a kind of constant action of pulling stress as claimed in claim 1, is characterized in that: to be the gradient be described lower support platform that the taper of 10 degree is domatic.
3. the corrosion experimental device of metal material under a kind of constant action of pulling stress as claimed in claim 1, it is characterized in that: the width of rebate of the free end of described upper brace table, lower support platform is 5mm, the degree of depth is 40mm, and perpendicular to processing the through circular hole that two diameters are 6mm in the plane of notch.
4. the corrosion experimental device of metal material under a kind of constant action of pulling stress as claimed in claim 1, is characterized in that: described stress corrosion sample pin is connected on the notch of described pull-up boom, drop-down boom by through circular hole.
5. the corrosion experimental device of metal material under a kind of constant action of pulling stress as claimed in claim 1, is characterized in that: have certain gap between described hydraulic jack urceolus and hydraulic jack inner core.
6. the corrosion experimental device of metal material under a kind of constant action of pulling stress as claimed in claim 1, is characterized in that: the material of described pull-up boom, drop-down boom, upper brace table, lower support platform is stainless steel.
7. the corrosion experimental device of metal material under a kind of constant action of pulling stress as claimed in claim 1, it is characterized in that: the diameter of described upper brace table is 200mm, the diameter of lower support platform is 300mm.
8. the corrosion experimental device of metal material under a kind of constant action of pulling stress as claimed in claim 1, is characterized in that: described support is three, is distributed on brace table, lower support platform circumferentially.
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| CN201410547800.5A CN104266909B (en) | 2014-10-16 | 2014-10-16 | The corrosion experimental device of metal material under a kind of constant action of pulling stress |
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| CN201410547800.5A CN104266909B (en) | 2014-10-16 | 2014-10-16 | The corrosion experimental device of metal material under a kind of constant action of pulling stress |
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| CN104266909B CN104266909B (en) | 2016-09-28 |
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Cited By (3)
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| CN104897744A (en) * | 2015-04-23 | 2015-09-09 | 中国石油大学(华东) | Metal hydrogen permeation behavior research device and method |
| CN107101885A (en) * | 2017-04-25 | 2017-08-29 | 河海大学 | Acoustic emission detection cable corrosion of coating fatigue crack initiation and the experimental rig of extension |
| CN117949306A (en) * | 2024-03-27 | 2024-04-30 | 河海大学 | Constant-resistance anchor rod large-displacement drawing machine and use method thereof |
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Cited By (4)
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| CN117949306B (en) * | 2024-03-27 | 2024-06-07 | 河海大学 | Constant-resistance anchor rod large-displacement drawing machine and use method thereof |
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| CN104266909B (en) | 2016-09-28 |
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