CN102830058B - Metal can and electrochemical device for detecting corrosion strength of same - Google Patents
Metal can and electrochemical device for detecting corrosion strength of same Download PDFInfo
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- CN102830058B CN102830058B CN201210323695.8A CN201210323695A CN102830058B CN 102830058 B CN102830058 B CN 102830058B CN 201210323695 A CN201210323695 A CN 201210323695A CN 102830058 B CN102830058 B CN 102830058B
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Abstract
The invention provides a metal can and an electrochemical device for detecting the corrosion strength of the metal can. The electrochemical device comprises an insulating screw. The bottom end of the insulating screw is threadedly connected with an insulating positioning component; a metal reference electrode column, a metal work electrode column and an metal auxiliary electrode column are fixed on the screw in a penetrating way; the bottom end of the auxiliary electrode column penetrates through the screw; an auxiliary electrode is arranged below the positioning component; a positioning metal sheet is fixedly arranged on the top end of the auxiliary electrode; the bottom end of the auxiliary electrode column penetrates through the positioning metal sheet and is fixedly connected with the auxiliary electrode; a reference electrode is arranged on the positioning component at the center axis of the auxiliary electrode in a penetrating way; the top end of the reference electrode is connected with the bottom end of the reference electrode column; and the screw is also provided with a first conductor sheet for connecting the electrode column with the metal can. The electrochemical device can be used for carrying out in situ electrochemical detection to the metal can without causing damage to the metal can and reflecting the corrosion strength of the metal can truly and is convenient to install.
Description
Technical field
The present invention relates to galvanic corrosion detection technique, particularly relate to a kind of metal can corrosion strength electrochemical detection device and metal can.
Background technology
Because the solution in metallic beverage can has corrosivity usually, metallic beverage can is easy to the solution generation electrochemical reaction in it thus causes the corrosion of metallic beverage can, and when the corrosion condition of metallic beverage can (beverage can that such as tinplate is made) exceedes to a certain degree, the ferric ion of separating out because of electrochemical reaction in the solution in it also can exceed limit value, not only affect mouthfeel, and probably corrosion failure metallic beverage can, cause solution to be revealed or go bad, this solution also cannot be drunk for people again, namely beverage there occurs corrosion failure within the shelf-life.Thus, need to adopt electrochemical method to detect metal can corrosion strength.When its inner wall corrosion condition detection being carried out to metallic beverage can in prior art, metallic beverage can is needed to destroy, the contrast electrode needed for electro-chemical test and auxiliary electrode to be placed in the solution of metal beverage tank body, again contrast electrode is connected with electrochemical workstation by wire with auxiliary electrode, thus constructs three-electrode electro Chemical detection system.
But, once metallic beverage can is destroyed, solution in it can expose in atmosphere at once, and the oxygen in air can accelerate the corrosion process of top tank structure and the putrid and deteriorated process of solution, severe jamming test result, and test after metallic beverage can status also no longer identical with other not opened metallic beverage can, truly cannot reflect the evolution of metal beverage in-tank corrosion, thus also can cause the residual life of beverage accommodating in the same batch of metallic beverage can produced that cannot reliably deduce.
Summary of the invention
For above-mentioned defect of the prior art, the invention provides a kind of metal can corrosion strength electrochemical detection device and metal can, can realize being installed on metal can in metal can manufacture process, can detect the corrosion strength of metal can when not destroying metal can, termly after dispatching from the factory, so obtain more truly, testing result accurately.
First aspect of the present invention is to provide a kind of metal can corrosion strength electrochemical detection device, comprising: an insulating screw, and the top of described screw is screw terminal, bottom is threaded portion; Described screw bottom is bolted with an insulation keeper, described screw is fixedly equipped with respectively the contrast electrode post of metal, working electrode post and auxiliary electrical pole, and the bottom of described auxiliary electrical pole is run through described screw and stretched out the bottom surface of described keeper; The auxiliary electrode of a hollow out is provided with in the below of described keeper, the central shaft of described auxiliary electrode is parallel to the bearing of trend of described screw, and be fixedly installed the positioning metal sheet of the central shaft perpendicular to described auxiliary electrode on the top of described auxiliary electrode, and the bottom of described auxiliary electrical pole is passed described positioning metal sheet and is fixedly connected with described auxiliary electrode by the first securing member; On described keeper and the cental axial position of corresponding described auxiliary electrode is fixedly equipped with shaft-like a, contrast electrode, the top of described contrast electrode is connected with the bottom of described contrast electrode post; Described screw is also provided with for by described working electrode post and tank connected first conductor piece of metal to be installed.
Another aspect of the present invention is to provide a kind of metal can, comprise: top cover, bottom and the sidewall be fixedly installed between described top cover and bottom, described top cover, bottom and sidewall surround an accommodating cavity, on described top cover or bottom, are fixedly installed metal can corrosion strength electrochemical detection device provided by the invention; Described screw is located on described top cover or bottom, described screw terminal is positioned at outside described accommodating cavity, described keeper, contrast electrode and auxiliary electrode are all positioned at described accommodating cavity, and by described keeper by described fastened by screw on described top cover or bottom; The first conductor piece on described bolt contacts with described top cover or bottom respectively.
Metal can corrosion strength electrochemical detection device provided by the invention and metal can, after manufacture completes and dispatches from the factory, electrochemical in-situ detection can be carried out to this metal can when not destroying metal can, eliminate air to the interference of the oxidation of solution to testing result, truly can reflect the corrosion strength of metal can, thus the residual life of the same batch of product produced reliably deduced; In addition, easy for installation and can dismantle between the metal can corrosion strength electrochemical detection device that the present embodiment provides and metal can, thus recycling can be realized, save cost, also more environmental protection.
Accompanying drawing explanation
Fig. 1 is the structural representation of metal can corrosion strength electrochemical detection device embodiment of the present invention;
Fig. 2 is the vertical view of screw in Fig. 1.
Embodiment
Fig. 1 is the structural representation of metal can corrosion strength electrochemical detection device embodiment of the present invention; Fig. 2 is the vertical view of screw in Fig. 1; Please refer to Fig. 1 and Fig. 2, the embodiment of the present invention provides a kind of metal can corrosion strength electrochemical detection device, comprising: an insulating screw 1, and the top of screw 1 is screw terminal, bottom is threaded portion; Screw 1 bottom is bolted with an insulation keeper 2, screw 1 is fixedly equipped with respectively the contrast electrode post 101 of metal, working electrode post 102 and auxiliary electrical pole 103, and the bottom of auxiliary electrical pole 103 is run through screw 1 and stretched out the bottom surface of keeper 2; The auxiliary electrode 13 of a hollow out is provided with in the below of keeper 2, the central shaft of auxiliary electrode 13 is parallel to the bearing of trend of screw 1, and the positioning metal sheet 131 of the central shaft perpendicular to auxiliary electrode 13 is fixedly installed on the top of auxiliary electrode 13, the bottom of auxiliary electrical pole 103 is passed positioning metal sheet 131 and is fixedly connected with auxiliary electrode 13 by the first securing member (not shown); On keeper 2 and the cental axial position of corresponding auxiliary electrode 13 is fixedly equipped with a shaft-like contrast electrode 11, the top of contrast electrode 11 is connected with the bottom of contrast electrode post 101; Screw 1 is also provided with for by working electrode post 102 and tank connected first conductor piece 201 of metal to be installed.
For the ease of understanding, the present embodiment is vertically arranged with screw 1 and the situation that screw terminal is positioned at top, threaded portion is positioned at below is specifically described, but the present invention is not limited to this.Screw 1 can adopt length suitable with diameter hex(agonal)screw, its material can adopt plastics or rubber, only needs to ensure that it insulate; Keeper 2 can be the nut matched with screw 1, and material can adopt plastics or rubber to ensure insulation equally; In addition, the length of the size of the linkage section between the screw terminal of screw 1 and threaded portion can match with the top cover 31 of metal can be installed or bottom 32, the length of keeper 2 can match with the length of the threaded portion of screw 1, with by which better keeper 2 by fastened by screw to the top cover 31 or bottom 32 of metal can.
Contrast electrode post 101, working electrode post 102 and auxiliary electrical pole 103 can adopt the metal material manufacture (such as 316L stainless steel) with satisfactory electrical conductivity and corrosion resistance, using as test terminals; Preferably, can at the end face of screw 1 and a deep gouge 104 is offered in the position of corresponding contrast electrode post 101, working electrode post 102 and auxiliary electrical pole 103, the top of each electrode column be made to be in deep gouge 104, to facilitate patching operations during test; Particularly, be embedded in respectively in screw 1 by mode contrast electrode post 101, working electrode post 102 and auxiliary electrical poles 103 such as injection mouldings.
Auxiliary electrode 13 can be positioned at the below of keeper 2 and coaxially arrange with screw 1; Auxiliary electrode 13 can be cylindrical tube shape, its sidewall can be offered multiple through hole to form hollow out effect; The positioning metal sheet 131 on the top of auxiliary electrode 13 can contact with the bottom end face of screw 1 and keeper 2 along horizontal-extending, simultaneously, auxiliary electrical pole 103 passes positioning metal sheet 131, and by one first securing member that is spirally connected in the bottom of auxiliary electrical pole 103 to locate auxiliary electrode 13; Here, auxiliary electrode 13 and positioning metal sheet 131 can adopt the material manufacture with excellent conductive performance and decay resistance.
The bottom end face of screw 1 can be offered an installation counterbore 105, contrast electrode 11 can fixedly be located in this installation counterbore 105, and contrast electrode post 101 can be arranged on and to install directly over counterbore 105 and to extend at the bottom of the hole of this installation counterbore 105 always, to make the top of contrast electrode 11 directly contact with the bottom of contrast electrode post 101, thus the connection both realizing; Certainly, also can the second conductor piece (such as 316L stainless steel substrates) be made up of the metal material of satisfactory electrical conductivity and corrosion resistance be set at the bottom of the hole of installing counterbore 105, like this, the top of contrast electrode 11 is connected with the bottom of contrast electrode post 101 by this second conductor piece.
First conductor piece 201 can fixedly be embedded on the catotropic bottom surface of the screw of screw 1, working electrode post 102 can be positioned at the top of the first conductor piece 201, and the bottom of working electrode post 102 is connected with the first conductor piece 201, namely, working electrode post 102 directly can extend to the first conductor piece 201 place, and contact with the first conductor piece 201, be installed to after on metal can to make screw 1, the first conductor piece 201 on the bottom end face of the screw terminal of screw 1 can contact with metal can, simultaneously because the first conductor piece 201 also contacts with working electrode post 102, thus just by the first conductor piece 201, working electrode post 102 is connected with metal can be installed.
The metal can corrosion strength electrochemical detection device that the present embodiment provides can be installed on metal can in metal can manufacture process, concrete installation procedure can be: on the top cover 31 or bottom 32 of metal can, offer one and the through hole that matches of linkage section between the screw terminal of screw 1 and threaded portion, then screw 1 is penetrated in this through hole, and keeper 2 is screwed onto on threaded portion, then auxiliary electrode 13 can be fixed on the bottom of auxiliary electrical pole 103 by the first securing member, so far, this pick-up unit completes with the assembling of top cover 31 or bottom 32, top cover 31 and/or bottom 32 need be fixedly connected with integral with the tank body of metal can according to existing technique by follow-up.Visible, installation procedure is very simple.
The metal can being provided with the metal can corrosion strength electrochemical detection device that the present embodiment provides can directly carry out three electrode original position Electrochemical Detection, namely, can by the contrast electrode post 101 on this pick-up unit, working electrode post 102 and auxiliary electrical pole 103 are connected to electrochemical workstation respectively, to make metal can, auxiliary electrode 13 and contrast electrode 11 form three-electrode electro Chemical test system, complete the in site measurement of corrosion electrochemistry parameter, just the residual life of this metal can be determined according to the data recorded, also the corrosion strength of the metal can that same batch is produced just is obtained.
The metal can corrosion strength electrochemical detection device that this enforcement provides, can in metal can manufacture process, be installed to easily and quickly on metal can, make after manufacture completes and dispatches from the factory, electrochemical in-situ detection can be carried out to this metal can when not destroying metal can, eliminate air to the interference of the oxidation of solution to testing result, truly can reflect the corrosion strength of metal can, thus the residual life of the same batch of product produced reliably deduced; In addition, the metal can corrosion strength electrochemical detection device that the present embodiment provides can be dismantled, and after finishing using on a metal can, can also pull down recycling, save cost, also more environmental protection.
In the above-described embodiments, auxiliary electrode 13 can be a column Compress Spring, and positioning metal sheet 131 can be microscler, and the two ends of positioning metal sheet 131 are fixedly connected with column Compress Spring respectively; Wherein, the two ends of positioning metal sheet 131 can be separately fixed on column Compress Spring by welding manner; Auxiliary electrode 13 weight of the present embodiment is lighter, and because the length of column Compress Spring can change because of compression, thus, the auxiliary electrode 13 of the present embodiment can also adapt to the metal can of differing heights specification.
Further, contrast electrode 11 is divided into the platinum section 111 of bottom and the copper section 112 at top, the length of platinum section 111 is less than copper section 112, and in copper section 112 and near the outer side covers of top end, have insulation course 113, the one end being coated with insulation course 113 is fixedly located in screw 1; Here, insulation course can be silica gel, or other insulating material such as PVC, the length of platinum section 111 can meet test needs at more than 10mm, other parts can replace platinum with copper material, have greatly saved cost, and, by covering insulation course 113 around copper section 112, copper material can be avoided the harmful effect of three-electrode electro Chemical detection system.
Further, the end face of keeper 2 offers annular groove, annular groove is centered around outside the threaded portion of screw 1, and in annular groove, be provided with O-ring seal 22, to be installed to after on metal can at this metal can corrosion strength electrochemical detection device, improve the sealing property between the top cover 31 of keeper 2 and metal can or bottom 32, prevent poor sealing from causing the corrosion in advance of solution in metal can.
Another embodiment of the present invention provides a kind of metal can, as depicted in figs. 1 and 2, comprising: top cover 31, bottom 32 and the sidewall 30 be fixedly installed between top cover 31 and bottom 32, and top cover 31, bottom 32 and sidewall 30 surround an accommodating cavity 10; On top cover 31 or bottom 32, be fixedly installed the metal can corrosion strength electrochemical detection device that as above any embodiment provides; Screw 1 is located on top cover or bottom, and screw terminal is positioned at outside accommodating cavity, and keeper 2, contrast electrode 11 and auxiliary electrode 13 are all positioned at accommodating cavity 10, and is fastened on top cover 31 or bottom 32 by keeper 2 by screw 1; The first conductor piece 201 on screw 1 contacts with top cover 31 or bottom 32 respectively.
The metal can that the present embodiment provides, by direct, contrast electrode post on metal can corrosion strength electrochemical detection device, working electrode post and auxiliary electrical pole are connected to electrochemical workstation respectively, metal can, auxiliary electrode and contrast electrode is made to form three-electrode electro Chemical test system, realize the in site measurement of corrosion electrochemistry parameter, thus the residual life of this metal can just can be determined according to the data recorded, just can obtain the corrosion strength of the metal can that same batch is produced; Eliminate air to the interference of the oxidation of solution to testing result, improve the accuracy of the data recorded.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (4)
1. a metal can corrosion strength electrochemical detection device, is characterized in that, comprising: an insulating screw, and the top of described screw is screw terminal, bottom is threaded portion; Described screw bottom is bolted with an insulation keeper, described screw is fixedly equipped with respectively the contrast electrode post of metal, working electrode post and auxiliary electrical pole, and the bottom of described auxiliary electrical pole is run through described screw and stretched out the bottom surface of described keeper; The auxiliary electrode of a hollow out is provided with in the below of described keeper, the central shaft of described auxiliary electrode is parallel to the bearing of trend of described screw, and be fixedly installed the positioning metal sheet of the central shaft perpendicular to described auxiliary electrode on the top of described auxiliary electrode, and the bottom of described auxiliary electrical pole is passed described positioning metal sheet and is fixedly connected with described auxiliary electrode by the first securing member; On described keeper and the cental axial position of corresponding described auxiliary electrode is fixedly equipped with a shaft-like contrast electrode, the top of described contrast electrode is connected with the bottom of described contrast electrode post; Described screw is also provided with for by described working electrode post and tank connected first conductor piece of metal to be installed; Described first conductor piece is fixedly embedded on the bottom surface of described screw terminal, and described working electrode post is positioned at the top of described first conductor piece, and the bottom of described working electrode post is connected with described first conductor piece;
Described auxiliary electrode is a column Compress Spring, and described positioning metal sheet is microscler, and the two ends of described positioning metal sheet are fixedly connected with described column Compress Spring respectively;
The top of described contrast electrode is connected with the bottom of described contrast electrode post by the second conductor piece;
Described contrast electrode is divided into the platinum section of bottom and the copper section at top, and the length of described platinum section is less than copper section, in described copper section and near the outer side covers of top end, have insulation course.
2. metal can corrosion strength electrochemical detection device according to claim 1, is characterized in that, described screw is plastics screw, described keeper is plastic nut.
3. metal can corrosion strength electrochemical detection device according to claim 2, it is characterized in that, the end face of described keeper offers annular groove, and described annular groove is centered around outside the threaded portion of described screw, is provided with O-ring seal in described annular groove.
4. a metal can, comprise: top cover, bottom and the sidewall be fixedly installed between described top cover and bottom, described top cover, bottom and sidewall surround an accommodating cavity, it is characterized in that, on described top cover or bottom, be fixedly installed just like the metal can corrosion strength electrochemical detection device described in claims 1 to 3 any one; Described screw is located on described top cover or bottom, described screw terminal is positioned at outside described accommodating cavity, described keeper, contrast electrode and auxiliary electrode are all positioned at described accommodating cavity, and by described keeper by described fastened by screw on described top cover or bottom; The first conductor piece on described screw contacts with described top cover or bottom respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210323695.8A CN102830058B (en) | 2012-09-04 | 2012-09-04 | Metal can and electrochemical device for detecting corrosion strength of same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210323695.8A CN102830058B (en) | 2012-09-04 | 2012-09-04 | Metal can and electrochemical device for detecting corrosion strength of same |
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| CN102830058A CN102830058A (en) | 2012-12-19 |
| CN102830058B true CN102830058B (en) | 2015-06-24 |
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| CN108872060A (en) * | 2016-07-22 | 2018-11-23 | 天津大学 | The method of in situ detection metal food packing jar inner wall corrosion |
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Address after: 101407 Beijing Huairou District wild goose Industrial Development Zone Patentee after: Origen Polytron Technologies Inc Address before: 101407 No. 7 Nan Yi Street, Yan Xi economic development zone, Huairou District, Beijing Patentee before: ORG Packaging Co., Ltd. |
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