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CN102830058A - 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 PDF

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Publication number
CN102830058A
CN102830058A CN2012103236958A CN201210323695A CN102830058A CN 102830058 A CN102830058 A CN 102830058A CN 2012103236958 A CN2012103236958 A CN 2012103236958A CN 201210323695 A CN201210323695 A CN 201210323695A CN 102830058 A CN102830058 A CN 102830058A
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CN
China
Prior art keywords
metal
screw
electrode
keeper
auxiliary electrode
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Application number
CN2012103236958A
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Chinese (zh)
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CN102830058B (en
Inventor
赵宇晖
曾科
宋莉华
李众
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Origen Polytron Technologies Inc
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ORG PACKAGING CO Ltd
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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

Metal can corrosion strength electrochemical detection device and metal can
Technical field
The present invention relates to the galvanic corrosion detection technique, relate in particular to a kind of metal can corrosion strength electrochemical detection device and metal can.
Background technology
Because the solution in the metallic beverage can has corrosivity usually; Thereby make metallic beverage can be easy to its in solution generation electrochemical reaction cause the corrosion of metallic beverage can; And when the corrosion condition of metallic beverage can (for example tinplate process beverage can) surpasses to a certain degree; The ferric ion of separating out because of electrochemical reaction in the solution in it also can surpass limit value, not only influences mouthfeel, and probably the corrosion failure metallic beverage can, cause solution to reveal or go bad; Make this solution also can't supply the people to drink again, promptly corrosion failure have taken place in beverage in the shelf-life.Thereby, need to adopt electrochemical method to detect the metal can corrosion strength.When in the prior art metallic beverage can being carried out its inner wall corrosion condition detection; Need metallic beverage can be destroyed; Place the solution of metal beverage tank body with contrast electrode that electro-chemical test is required and auxiliary electrode; Again contrast electrode is connected with electrochemical workstation through lead with auxiliary electrode, thereby constructs the three-electrode electro Chemical detection system.
But; In case metallic beverage can is destroyed; Solution in it can be exposed in the air at once; And airborne oxygen can quicken the corrosion process of jar inwall and the putrid and deteriorated process of solution, serious disturbed test result, and the metallic beverage can state of living in after the test is also no longer identical with other metallic beverage can of not opening; Can't truly reflect the evolution of metal beverage in-tank corrosion, thereby also can cause the residual life of beverage ccontaining in the same batch of metallic beverage can of producing can't reliably inferring out.
Summary of the invention
To above-mentioned defective of the prior art; The present invention provides a kind of metal can corrosion strength electrochemical detection device and metal can; Can be implemented in the metal can manufacture process and be installed on the metal can; Can be under the situation of not destroying metal can after dispatching from the factory, the corrosion strength to metal can detects termly, and then obtain more truly, testing result accurately.
First aspect of the present invention provides a kind of metal can corrosion strength electrochemical detection device, comprising: an insulating screw, the top of said screw are that screw terminal, bottom are the threaded portion; Said screw bottom is bolted with an insulation keeper, fixedly is equipped with contrast electrode post, working electrode post and the auxiliary electrical pole of metal on the said screw respectively, the bottom surface that the bottom of said auxiliary electrical pole is run through said screw and stretched out said keeper; Below said keeper, be provided with the auxiliary electrode of a hollow out; The central axes of said auxiliary electrode is in the bearing of trend of said screw; And be set with location sheet metal on the top of said auxiliary electrode, and the bottom of said auxiliary electrical pole is passed said location sheet metal, and is fixedly connected with said auxiliary electrode through first securing member perpendicular to the central shaft of said auxiliary electrode; On said keeper and the central shaft stationkeeping of corresponding said auxiliary electrode be equipped with shaft-like a, contrast electrode, the top of said contrast electrode is connected with the bottom of said contrast electrode post; Also be provided with on the said screw and be used for said working electrode post and tank connected first conductor piece of metal to be installed.
Another aspect of the present invention provides a kind of metal can; Comprise: top cover, bottom and be fixedly installed on the sidewall between said top cover and the bottom; Said top cover, bottom and sidewall surround a ccontaining cavity, on said top cover or bottom, be set with metal can corrosion strength electrochemical detection device provided by the invention; Said screw is located on said top cover or the bottom; Said screw terminal is positioned at outside the said ccontaining cavity; Said keeper, contrast electrode and auxiliary electrode all are positioned at said ccontaining cavity, and through said keeper said screw are fastened on said top cover or the bottom; First conductor piece on the said bolt contacts with said top cover or bottom respectively.
Metal can corrosion strength electrochemical detection device provided by the invention and metal can; After the manufacturing completion is dispatched from the factory; Can under the situation of not destroying metal can, carry out electrochemical in-situ to this metal can detects; Got rid of air to the interference of the oxidation of solution, can truly reflect the corrosion strength of metal can testing result, thus the residual life of the same batch of product of producing of reliably inferring out; In addition, easy for installation between metal can corrosion strength electrochemical detection device that present embodiment provides and the metal can, and can dismantle, thus can realize recycling, practiced thrift cost, also more environmental protection.
Description of drawings
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 among 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 among Fig. 1; Please see figures.1.and.2, the embodiment of the invention provides a kind of metal can corrosion strength electrochemical detection device, comprising: an insulating screw 1, the top of screw 1 are that screw terminal, bottom are the threaded portion; Screw 1 bottom is bolted with an insulation keeper 2, fixedly is equipped with contrast electrode post 101, working electrode post 102 and the auxiliary electrical pole 103 of metal on the screw 1 respectively, the bottom surface that the bottom of auxiliary electrical pole 103 is run through screw 1 and stretched out keeper 2; Below keeper 2, be provided with the auxiliary electrode 13 of a hollow out; The central axes of auxiliary electrode 13 is in the bearing of trend of screw 1; And be set with the location sheet metal 131 perpendicular to the central shaft of auxiliary electrode 13 on the top of auxiliary electrode 13, the bottom of auxiliary electrical pole 103 is passed location sheet metal 131, and is fixedly connected with auxiliary electrode 13 through first securing member (scheming not show); On keeper 2 and the central shaft stationkeeping of corresponding auxiliary electrode 13 be equipped with a shaft-like contrast electrode 11, the top of contrast electrode 11 is connected with the bottom of contrast electrode post 101; Also be provided with on the screw 1 and be used for working electrode post 102 and tank connected first conductor piece 201 of metal to be installed.
For the ease of understanding, present embodiment vertically is provided with screw 1 and screw terminal is positioned at top, the threaded portion situation below being positioned at and specifies, 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 guarantee that its insulation gets final product; Keeper 2 can be the nut that is complementary with screw 1, and material can adopt plastics or rubber to guarantee insulation equally; In addition; The length of the screw terminal of screw 1 and the size of the linkage section between the threaded portion can be complementary with the top cover 31 or the bottom 32 of metal can be installed; The length of keeper 2 can be complementary with the length of the threaded portion of screw 1, through keeper 2 screw is fastened on the top cover 31 or bottom 32 of metal can better.
Contrast electrode post 101, working electrode post 102 and auxiliary electrical pole 103 can adopt the metal material manufacturing (for example 316L stainless steel) with satisfactory electrical conductivity and corrosion resistance, with as the test terminals; Preferably, can offer a deep gouge 104, make the top of each electrode column be in the deep gouge 104, the wiring operation during with convenient test at the end face of screw 1 and the position of corresponding contrast electrode post 101, working electrode post 102 and auxiliary electrical pole 103; Particularly, can be embedded in respectively in the screw 1 through 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 keeper 2 the below and with screw 1 coaxial setting; Auxiliary electrode 13 can be cylindrical tube shape, can offer a plurality of through holes on its sidewall to form the hollow out effect; The location sheet metal 131 on the top of auxiliary electrode 13 can be along horizontal-extending, and can contact with the bottom end face of screw 1 and keeper 2; Simultaneously; Auxiliary electrical pole 103 passes location sheet metal 131, and one first securing member that can be spirally connected through the bottom at auxiliary electrical pole 103 is located auxiliary electrode 13; Here, auxiliary electrode 13 can adopt the made with excellent conductive performance and decay resistance with location sheet metal 131.
Can offer one on the bottom end face of screw 1 counterbore 105 is installed; Contrast electrode 11 can fixedly be located in this installation counterbore 105; And contrast electrode post 101 can be arranged on install counterbore 105 directly over, and extend at the bottom of the hole of this installation counterbore 105 always; So that the top of contrast electrode 11 directly contacts with the bottom of contrast electrode post 101, thereby realize both connections; Certainly; Also second conductor piece of being processed by the metal material of satisfactory electrical conductivity and corrosion resistance (for example 316L stainless steel substrates) can be set at the bottom of the hole that counterbore 105 is installed; Like this, the top of contrast electrode 11 can be connected with the bottom of contrast electrode post 101 through this second conductor piece.
201 of first conductor pieces 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 first conductor piece 201; And the bottom of working electrode post 102 is connected with first conductor piece 201, that is, working electrode post 102 can directly extend to first conductor piece, 201 places and contact with first conductor piece 201; So that after screw 1 is installed on the metal can; First conductor piece 201 on the bottom end face of the screw terminal of screw 1 can contact with metal can, because first conductor piece 201 also contacts with working electrode post 102, thereby just can pass through first conductor piece 201 working electrode post 102 is connected with metal can be installed simultaneously.
The metal can corrosion strength electrochemical detection device that present embodiment provides can be installed on the metal can in the metal can manufacture process; Concrete installation procedure can for: on the top cover 31 of metal can or bottom 32, offer one and the screw terminal of screw 1 and the through hole that the linkage section between the threaded portion is complementary; Then screw 1 is penetrated in this through hole; And keeper 2 is screwed onto on the threaded portion; Can auxiliary electrode 13 be fixed on the bottom of auxiliary electrical pole 103 through first securing member then; So far, the assembling of this pick-up unit and top cover 31 or bottom 32 is accomplished, and follow-up need are fixedly connected top cover 31 and/or bottom 32 to be integral with the tank body of metal can according to existing technology and get final product.It is thus clear that installation procedure is very simple.
The metal can that the metal can corrosion strength electrochemical detection device that present embodiment provides is installed can directly carry out three electrode original position Electrochemical Detection; Promptly; Can the contrast electrode post 101 on this pick-up unit, working electrode post 102 and auxiliary electrical pole 103 be connected to electrochemical workstation respectively; So that metal can, auxiliary electrode 13 and contrast electrode 11 are formed the three-electrode electro Chemical test system; Accomplish the corrosion electrochemistry parameters in situ and measure, just can confirm the residual life of this metal can, also just obtained the corrosion strength of the metal can of same batch of production according to the data that record.
The metal can corrosion strength electrochemical detection device that this enforcement provides; Can in the metal can manufacture process, be installed to easily and quickly on the metal can, make after the manufacturing completion is dispatched from the factory; Can under the situation of not destroying metal can, carry out electrochemical in-situ to this metal can detects; Got rid of air to the interference of the oxidation of solution, can truly reflect the corrosion strength of metal can testing result, thus the residual life of the same batch of product of producing of reliably inferring out; In addition, the metal can corrosion strength electrochemical detection device that present embodiment provides can be dismantled, and when after finishing using on the metal can, can also pull down recycling, has practiced thrift cost, also more environmental protection.
In the above-described embodiments, auxiliary electrode 13 can be a column compression spring, and location sheet metal 131 can be microscler, and the two ends of location sheet metal 131 are fixedly connected with the column compression spring respectively; Wherein, the two ends of location sheet metal 131 can be separately fixed on the column compression spring through welding manner; Auxiliary electrode 13 weight of present embodiment are lighter, and because the length of column compression spring can change because of compression, thereby the auxiliary electrode 13 of 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, on copper section 112 and near the outer side covers of top end, insulation course 113 arranged, and an end that is coated with insulation course 113 fixedly is located in the screw 1; Here, insulation course can be silica gel, perhaps other insulating material such as PVC; The length of platinum section 111 can satisfy the test needs more than 10mm; Other part can replace platinum with copper material, has practiced thrift cost greatly, and; Through around copper section 112, covering insulation course 113, can avoid the harmful effect of copper material to the three-electrode electro Chemical detection system.
Further; On the end face of keeper 2, offer annular groove; Annular groove is centered around the outside, threaded portion of screw 1, and is provided with O-ring seal 22 in the annular groove, after being installed on the metal can at this metal can corrosion strength electrochemical detection device; Improve keeper 2 and the top cover 31 of metal can or the sealing property between the bottom 32, prevent that poor sealing from causing the corrosion in advance of solution in the metal can.
Another embodiment of the present invention provides a kind of metal can, and is as depicted in figs. 1 and 2, comprising: top cover 31, bottom 32 and be fixedly installed on top cover 31 and bottom 32 between sidewall 30, top cover 31, bottom 32 and sidewall 30 surround a ccontaining cavity 10; On top cover 31 or bottom 32, be set with the metal can corrosion strength electrochemical detection device that as above arbitrary embodiment provides; Screw 1 is located on top cover or the bottom, and screw terminal is positioned at outside the ccontaining cavity, and keeper 2, contrast electrode 11 and auxiliary electrode 13 all are positioned at ccontaining cavity 10, and through keeper 2 screw 1 is fastened on top cover 31 or the bottom 32; First conductor piece 201 on the screw 1 contacts with top cover 31 or bottom 32 respectively.
The metal can that present embodiment provides; Can be through directly the contrast electrode post on the metal can corrosion strength electrochemical detection device, working electrode post and auxiliary electrical pole being connected to electrochemical workstation respectively; Make metal can, auxiliary electrode and contrast electrode form the three-electrode electro Chemical test system; Realize that the corrosion electrochemistry parameters in situ measures, thereby just can confirm the residual life of this metal can, just can obtain the corrosion strength of the metal can of same batch of production according to the data that record; Got rid of air to the interference of the oxidation of solution, improved the accuracy of the data that record testing result.
What should explain at last is: above each embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although the present invention has been carried out detailed explanation with reference to aforementioned each embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, perhaps to wherein part or all technical characteristic are equal to replacement; And these are revised or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.

Claims (8)

1. a metal can corrosion strength electrochemical detection device is characterized in that, comprising: an insulating screw, the top of said screw are that screw terminal, bottom are the threaded portion; Said screw bottom is bolted with an insulation keeper, fixedly is equipped with contrast electrode post, working electrode post and the auxiliary electrical pole of metal on the said screw respectively, the bottom surface that the bottom of said auxiliary electrical pole is run through said screw and stretched out said keeper; Below said keeper, be provided with the auxiliary electrode of a hollow out; The central axes of said auxiliary electrode is in the bearing of trend of said screw; And be set with location sheet metal on the top of said auxiliary electrode, and the bottom of said auxiliary electrical pole is passed said location sheet metal, and is fixedly connected with said auxiliary electrode through first securing member perpendicular to the central shaft of said auxiliary electrode; On said keeper and the central shaft stationkeeping of corresponding said auxiliary electrode be equipped with a shaft-like contrast electrode, the top of said contrast electrode is connected with the bottom of said contrast electrode post; Also be provided with on the said screw and be used for said working electrode post and tank connected first conductor piece of metal to be installed.
2. metal can corrosion strength electrochemical detection device according to claim 1 is characterized in that, the top of said contrast electrode is connected with the bottom of said contrast electrode post through second conductor piece.
3. metal can corrosion strength electrochemical detection device according to claim 1; It is characterized in that; Said auxiliary electrode is a column compression spring, and said location sheet metal is microscler, and the two ends of said location sheet metal are fixedly connected with said column compression spring respectively.
4. according to any described metal can corrosion strength electrochemical detection device of claim 1 to 3; It is characterized in that; Said contrast electrode is divided into the platinum section of bottom and the copper section at top; The length of said platinum section is less than the copper section, on said copper section and near the outer side covers of top end, insulation course arranged.
5. metal can corrosion strength electrochemical detection device according to claim 4 is characterized in that, said screw is that plastics screw, said keeper are plastic nut.
6. metal can corrosion strength electrochemical detection device according to claim 5; It is characterized in that; Said first conductor piece fixedly is embedded on the bottom surface of said screw terminal; Said working electrode post is positioned at the top of said first conductor piece, and the bottom of said working electrode post is connected with said first conductor piece.
7. metal can corrosion strength electrochemical detection device according to claim 5; It is characterized in that; On the end face of said keeper, offer annular groove, said annular groove is centered around the outside, threaded portion of said screw, is provided with O-ring seal in the said annular groove.
8. metal can; Comprise: top cover, bottom and be fixedly installed on the sidewall between said top cover and the bottom; Said top cover, bottom and sidewall surround a ccontaining cavity; It is characterized in that, on said top cover or bottom, fixedly install just like any described metal can corrosion strength electrochemical detection device of claim 1 to 7; Said screw is located on said top cover or the bottom; Said screw terminal is positioned at outside the said ccontaining cavity; Said keeper, contrast electrode and auxiliary electrode all are positioned at said ccontaining cavity, and through said keeper said screw are fastened on said top cover or the bottom; First conductor piece on the said bolt contacts with said top cover or bottom respectively.
CN201210323695.8A 2012-09-04 2012-09-04 Metal can and electrochemical device for detecting corrosion strength of same Active CN102830058B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106092871A (en) * 2016-07-22 2016-11-09 天津大学 An in-situ detection device and method for evaluating the inner wall corrosion of metal food packaging cans

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106092871A (en) * 2016-07-22 2016-11-09 天津大学 An in-situ detection device and method for evaluating the inner wall corrosion of metal food packaging cans
CN106092871B (en) * 2016-07-22 2019-04-19 天津大学 An in-situ detection device and method for evaluating the corrosion of the inner wall of a metal food packaging can

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