CN105004660B - The electrode assembly of atmospheric corrosion process under on-spot study drop - Google Patents
The electrode assembly of atmospheric corrosion process under on-spot study drop Download PDFInfo
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- CN105004660B CN105004660B CN201510496156.8A CN201510496156A CN105004660B CN 105004660 B CN105004660 B CN 105004660B CN 201510496156 A CN201510496156 A CN 201510496156A CN 105004660 B CN105004660 B CN 105004660B
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Abstract
The present invention relates to a kind of electrode assembly of atmospheric corrosion process under on-spot study drop, the problem of mainly solving complicated, expensive in the prior art.Electrode assembly of the invention by using atmospheric corrosion process under a kind of on-spot study drop, above mentioned problem is preferably solved including crosshead, 3D operating desks, gas feed, drop, the capillary salt bridge of saturation KCl agar, the technical scheme to electrode, filamentary silver, glass tube, silica gel, silver chlorate, the saturation KCl solution containing AgCl, gas vent, working electrode, chamber, the knob for adjusting upper-lower height, electrochemical workstation, lead-out wire, insulating box, during atmospheric corrosion under on-spot study drop.
Description
Technical field
The present invention relates to a kind of electrode assembly of atmospheric corrosion process under on-spot study drop.
Background technology
Rapid recently as global ocean strategy development, the material used in marine environment is by even more serious
Challenge.Aerosol produces important effect to material surface etc. especially in naval air environment, and is used for the life-span and causes
Serious influence.
Metal atmospheric corrosion is a kind of important form of atmospheric corrosion under drop, especially proximate to the building near coastline
Or metallic facility causes very big destruction.Atmospheric corrosion is related to gas liquid solid and its complex process at interface, therefore many
Factor can influence its corrosion process.Atmospheric corrosion is substantially that the drop condensed on electrochemical process, metal surface is to lure
The main cause of metal atmospheric corrosion is sent out, now drop centered is anodic process, and its edge but carries out cathodic process, therefore grinds
The drop atmospheric corrosion process for studying carefully metal has great importance.
In recent years, it is many to the atmospheric corrosion research under drop, also obtain a series of achievements.CN200420031215.1 is related to
And a kind of electrochemical state in-situ test electrode for studying atmospheric corrosion process under drop.It is insulation film is in two metals
Between the slit of electrode, surrounding filling insulating resin, outer cover insulating sleeve, from wire and the outside of the extraction of two metal electrode bottoms
Polarized circuit is formed by connecting.With this electrode electrochemical state in-situ test can be carried out to very small single drop.Conventional salt fog
The researchs of the process to metal surface electrochemical state such as evaporation, cohesion and the extension of case experimental technique Investigation of Metal Surface drop,
But a large amount of fraction drops are on single electrode, it is impossible to independent Atmospheric Corrosion occurrence and development process.Although also having a lot
Atmospheric corrosion process under the single drop of research, but seldom reference electrode and being integrated together to electrode is studied, this meeting
Destroy the integrality of test droplets, it is impossible to truly reflect atmospheric corrosion situation under drop.Also there is small part reference electrode
With integrate research to electrode, but its reference electrode criteria of right and wrong reference electrode or too small therefore right to electrode area
Obtain correct corrosion process information and play certain interference effect.And experimental technique based on Kelvin probe reference electrodes although
Electro-chemical test can be carried out to single drop, but its is complicated, and expensive, it is extensive that the factor such as environment limitation limits its
Use.
The content of the invention
The technical problems to be solved by the invention are that Kelvin probes reference electrode is complicated in the prior art, price is held high
It is expensive, there is provided a kind of electrode assembly of atmospheric corrosion process under new on-spot study drop the problem of be difficult by reference electrode.Should
Device is used under on-spot study drop during atmospheric corrosion, with it is simple in construction, cheap, use the excellent of reference electrode
Point.
To solve the above problems, the technical solution adopted by the present invention is as follows：Atmospheric corrosion mistake under a kind of on-spot study drop
The electrode assembly of journey, including crosshead, 3D operating desks, gas feed, drop, the capillary salt bridge of saturation KCl agar, to electricity
Pole, filamentary silver, glass tube, silica gel, silver chlorate, the saturation KCl solution containing AgCl, gas vent, working electrode, chamber, adjustment
Knob, electrochemical workstation, lead-out wire, the insulating box of upper-lower height, reference electrode end is filled with the capillary of saturation KCl agar
Pipe salt bridge, is wrapped in capillary salt bridge end to electrode, working electrode, electrode, reference electrode is connected with lead-out wire one end, draws
The outlet other end is connected with electrochemical workstation, and gas feed, gas vent are located in chamber, and working electrode, drop are located at
In chamber, chamber is fixed on 3D operating desks, the knob regulation capillary of the adjustment upper-lower height on rotation 3D operating desks
The relative position of salt bridge and working electrode, the capillary salt bridge of saturation KCl agar, passes through crosshead and 3D operating desks to electrode
In drop on regulation insertion working electrode.
In above-mentioned technical proposal, it is preferable that one end of the glass tube of reference electrode is filled with the capillary of KCl agar, glass
Saturated potassium chloride solution full of chloride containing silver in glass pipe, the saturation potassium chloride for being coated with the filamentary silver insertion chloride containing silver of silver chlorate is molten
In the glass tube of liquid, the filamentary silver other end is connected to lead-out wire；Glass tube is fixed on the motion arm of crosshead, is coated with silver chlorate
Filamentary silver is provided with silica gel.
In above-mentioned technical proposal, it is preferable that the electrode assembly is integrally positioned in insulating box.
In above-mentioned technical proposal, it is preferable that the air in humidity control case is brought into examination by gas feed by air pump
In tryoff.
In above-mentioned technical proposal, it is preferable that described that electrode is made up of platinum filament or spun gold.
In above-mentioned technical proposal, it is preferable that be not more than 0.4mm to the diameter of electrode, the capillary full of saturation KCl agar
Salt bridge length is controlled in 0.2~0.5mm.
This patent is difficult by the shortcoming of reference electrode during being directed to atmospheric corrosion electrochemical research, and miniature ginseng is used in proposition
The device that atmospheric corrosion electrochemical process is studied under drop is studied than electrode, the influence of solution ohmmic drop can be effectively reduced, compare
Atmospheric corrosion electrochemical process electric current and potential change under drop accurately are drawn, three-electrode system Atmospheric Corrosion can be used,
Achieve preferable technique effect.
Brief description of the drawings
Fig. 1 is the structural representation of device of the present invention.
In Fig. 1,1- crossheads, 2-3D operating desks, 3- gas feeds, 4- drops, the capillary of 5- saturation KCl agar
Pipe salt bridge, 6- is to electrode, 7- filamentary silvers, 8- glass tubes, 9- silica gel, 10- silver chlorates (AgCl), saturations of the 11- containing AgCl
KCl solution, 12- gas vents, 13- working electrodes, 14- chambers, 15- adjusts the knob of upper-lower height, 16- electrifications
Learn work station, 17- lead-out wires, 18- insulating boxs.
Below by embodiment, the invention will be further elaborated, but is not limited only to the present embodiment.
Embodiment
【Embodiment 1】
The present invention relates to a kind of electrode assembly of atmospheric corrosion process under on-spot study drop, as shown in figure 1, main by grasping
Make frame 1,3D operating desks 2, gas feed 3, drop 4, the capillary salt bridge 5 of saturation KCl agar, platinum filament to electrode 6, filamentary silver 7, glass
Glass pipe 8, silica gel 9, silver chlorate (AgCl) 10, the saturation KCl solution 11 containing AgCl, gas vent 12, working electrode 13, chamber
14th, knob 15, electrochemical workstation 16, lead-out wire 17, the insulating box 18 of adjustment upper-lower height are constituted.Reference electrode end is to fill
The capillary salt bridge 5 of full saturation KCl agar, platinum filament is wrapped in the end of capillary salt bridge 5 to electrode 6,3D operating desks 2 is fixed on together
On, the regulation capillary of knob 15 salt bridge 5 of the adjustment upper-lower height on rotation 3D operating desks 2 and the relative position of working electrode 13
Put.The drop 4 on regulation insertion working electrode 13 that capillary salt bridge 5, platinum filament pass through crosshead 1 and 3D operating desks 2 to electrode 6
In.
The platinum filament of the present invention is not more than 0.4mm to the diameter control of electrode.Capillary salt bridge 5 full of saturation KCl agar
Length is controlled in 0.2mm.Drop 4 is that certain drop is added dropwise by liquid-transfering gun to be formed on working electrode 13.In order to reduce drop 4
The influence evaporated in test process, gas feed 3 is passed through the gas of certain relative humidity.
【Embodiment 2】
According to the condition described in embodiment 1, the length of capillary salt bridge 5 full of saturation KCl agar is controlled in 0.5mm.
【Embodiment 3】
According to the condition described in embodiment 1, the length of capillary salt bridge 5 full of saturation KCl agar is controlled in 0.3mm.
【Comparative example】
Under research drop during atmospheric corrosion, such as CN200420031215.1, seldom reference electrode and to electricity
Pole, which is integrated together, to be studied, and the result tested is more single, it is difficult to comprehensively reflect atmospheric corrosion under drop
Situation.Even if being integrated reference electrode and to electrode, but its reference electrode criteria of right and wrong reference electrode or to electrode
Area is too small, and certain interference effect is played to obtaining correct corrosion process information.And Kelvin probe reference electrodes can be with
Electro-chemical test is carried out to single drop, but its is complicated, and expensive, the factor such as environment limitation, which limits it, widely to be made
With.
Obviously, this patent is difficult by the shortcoming of reference electrode during being directed to atmospheric corrosion electrochemical research, proposes to use
The device that atmospheric corrosion electrochemical process is studied under miniature reference electrodes research drop, can effectively reduce solution ohmmic drop shadow
Ring, more accurately draw atmospheric corrosion electrochemical process electric current and potential change under drop, can study big with three-electrode system
Gas corrosion, achieves preferable technique effect.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, also have for atmospheric corrosion process under drop
More extensive effect, and can make improvements and also convert.
Claims (1)
1. the electrode assembly of atmospheric corrosion process under a kind of on-spot study drop, including crosshead, 3D operating desks, gas feed,
It is drop, the capillary salt bridge of saturation KCl agar, molten to electrode, filamentary silver, glass tube, silica gel, silver chlorate, the saturation KCl containing AgCl
Liquid, gas vent, working electrode, chamber, knob, electrochemical workstation, lead-out wire, the insulating box for adjusting upper-lower height, ginseng
Than the capillary salt bridge that electrode end is filled with saturation KCl agar, capillary salt bridge end is wrapped in electrode, it is working electrode, right
Electrode, reference electrode are connected with lead-out wire one end, and the lead-out wire other end is connected with electrochemical workstation, gas feed, gas
Outlet is located in chamber, and working electrode, drop are located in chamber, and chamber is fixed on 3D operating desks, rotation 3D operations
The knob regulation capillary salt bridge and the relative position of working electrode of adjustment upper-lower height on platform, the capillary of saturation KCl agar
In drop on pipe salt bridge, the regulation insertion working electrode for passing through crosshead and 3D operating desks to electrode；The glass of reference electrode
One end of pipe is filled with the saturated potassium chloride solution full of chloride containing silver in the capillary of KCl agar, glass tube, is coated with silver chlorate
Filamentary silver insertion chloride containing silver saturated potassium chloride solution glass tube in, the filamentary silver other end is connected to lead-out wire；Glass tube is consolidated
It is scheduled on the motion arm of crosshead, the filamentary silver for being coated with silver chlorate is provided with silica gel；0.4mm is not more than to the diameter of electrode, is full of
The capillary salt bridge length of saturation KCl agar is controlled in 0.2~0.5mm；The electrode assembly is integrally positioned in insulating box；It is logical
Air pump is crossed to bring in chamber the air in humidity control case into by gas feed；Described is platinum filament or spun gold system to electrode
Into.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108226239A (en) * | 2017-12-28 | 2018-06-29 | 南京钢铁股份有限公司 | A kind of preparation method of filament type salt bridge |
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| CN107589157A (en) * | 2017-11-01 | 2018-01-16 | 青岛科技大学 | Photic electrochemical sensor |
| CN108645898B (en) * | 2018-06-06 | 2020-04-07 | 厦门大学 | Electrochemical performance testing device and electrochemical performance testing method |
| CN108844886B (en) * | 2018-06-28 | 2020-12-18 | 深圳大学 | Power-on acceleration simulation system and method for accurately controlling pitting corrosion |
| CN108645783A (en) * | 2018-08-20 | 2018-10-12 | 南京钢铁股份有限公司 | A kind of microcell electrochemical testing device and its test method |
| CN110220837A (en) * | 2019-05-21 | 2019-09-10 | 中国船舶重工集团公司第七二五研究所 | One kind is for corroding in-situ monitoring method and device under high temperature, high humidity, atmospheric environment with high salt |
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