CN107037092A - The non-conductive layer breaking point method of testing on metalwork surface - Google Patents
The non-conductive layer breaking point method of testing on metalwork surface Download PDFInfo
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- CN107037092A CN107037092A CN201611126970.1A CN201611126970A CN107037092A CN 107037092 A CN107037092 A CN 107037092A CN 201611126970 A CN201611126970 A CN 201611126970A CN 107037092 A CN107037092 A CN 107037092A
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
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Abstract
The present invention provides a kind of non-conductive layer breaking point method of testing on metalwork surface.This method comprises the following steps：Feed：There is provided surface has the metalwork of non-conductive layer；Electrolysis unit and electrolyte solution are provided；It will be immersed after metalwork holes formation holes point in electrolyte solution, and anode be connected with the holes point of the metalwork, the negative electrode and the electrolyte solution contacts constitute electrolysis system；Test：Power-on makes the electrolysis system be powered, by checking that the discoloration of electrolyte solution on the metalwork surface determines the non-conductive layer breaking point on the metalwork surface.The method of the non-conductive layer breaking point on the detection metalwork surface that the present invention is provided is simple and quick.
Description
【Technical field】
The present invention relates to a kind of metalwork field of surface treatment, the more particularly to non-conductive layer breaking point on metalwork surface is surveyed
Method for testing.
【Background technology】
In present smart machine, metalwork is because its good physical property and appearance attractive in appearance so that it should
With more and more extensive.In order that the color of shell for obtaining smart machine is more liked by consumer or makes the metal of the smart machine
Part service life is longer, it is necessary to non-conductive layer, such as anodic oxide coating be formed on the surface of metalwork, to realize the table of metalwork
Face colouring, and improve the corrosion resistance of metalwork, enhancing wearability and hardness etc..
, it is necessary to detect the quality of the non-conductive layer processing in the surface in time to control during production prepares non-conductive layer
Its quality, the non-conductive layer on current surface need to just can detect that breaking point or thin weak person position after environmental reliability, its
Time-consuming and efficiency is low for detection method, therefore, it is impossible to which the quality fluctuation of monitoring industrial processes in time, realizes adjustment in time.
Therefore, it is necessary to provide a kind of method for the non-conductive layer breaking point for being capable of quick detection metalwork surface in fact.
【The content of the invention】
It is an object of the invention to provide a kind of method of the non-conductive layer breaking point on quick detection metalwork surface, method
It is simple and can in time in monitoring industrial processes quality fluctuation, realize and adjust in time.
In order to solve the above-mentioned technical problem, technical scheme is as follows：A kind of non-conductive layer on metalwork surface is broken
Point method of testing is damaged, this method comprises the following steps：
Feed：There is provided surface has the metalwork of non-conductive layer；
Electrolysis unit and electrolyte solution are provided:The electrolysis unit include anode, negative electrode and respectively with the anode and
The power supply of the negative electrode connection, the electrolyte solution is the sodium-chloride water solution comprising phenolphthalein reagent；
Constitute electrolysis system：By metalwork holes formation holes point；The metalwork after holes is immersed into electrolysis
Matter solution, while the anode is connected with the holes point of the metalwork, the negative electrode and the electrolyte solution contacts, structure
Into electrolysis system；
Test：Power-on makes the electrolysis system be powered, by the electrolyte solution for checking the metalwork surface
Discoloration determines the non-conductive layer breaking point on the surface of the metalwork.
It is preferred that, in the testing procedure, the discoloration includes whether discoloration, and the area sum changed colour
Amount.
It is preferred that, if the electrolyte solution on the metalwork surface becomes red, the metalwork surface it is non-conductive
There is breaking point at position with becoming the red electrolyte solution contacts in layer.
It is preferred that, the electrolyte solution is mixed to prepare by water, phenolphthalein reagent and sodium chloride；Wherein, water, phenolphthalein reagent
And the mass ratio of sodium chloride is 900~1100：20~40：1~3.
It is preferred that, in the electrolyte solution, the mass ratio of water, phenolphthalein reagent and sodium chloride is 1000：30：2.It is preferred that
, the compound method of the phenolphthalein reagent is：8~10g phenolphthalein is taken, and the phenolphthalein is dissolved to 500mL 95% ethanol solution
In.
It is preferred that, in the testing procedure, the dc source that the power supply in electrolysis system is 12V~24V.
It is preferred that, in the testing procedure, it is 10s~30s that electrolysis system, which carries out electrolysis time,.
Compared with correlation technique, the non-conductive layer breaking point method of testing on metalwork surface that the present invention is provided has following
Beneficial effect：The present invention is by by metalwork holes formation holes point, by the metalwork immersion electrolyte solution after holes,
The anode is connected with the holes point of the metalwork simultaneously, the negative electrode and the electrolyte solution contacts constitute electrolysis
System；Will not conducting electrolyte, electrolyte solution nondiscolouring, if metalwork table if the non-conductive layer on metalwork surface is without breakage
There is breaking point in the non-conductive layer in face, then can occur the electrolyte solution around cell reaction, breaking point can become red, work as electricity
After enzymatic hydrolysis system is powered, the metalwork can be determined by the discoloration for the electrolyte solution for checking the metalwork surface
The non-conductive layer breaking point on surface, judges the quality of the non-conductive layer on metalwork surface, i.e. its degree being corroded.The test side
Method simple and fast, it is only necessary to which 10~30s is the weak location for the non-conductive layer that can detect that the surface, therefore can monitor production in time
During quality fluctuation, realize in time adjustment.
【Brief description of the drawings】
The step flow chart of the non-conductive layer breaking point method of testing on the metalwork surface that Fig. 1 provides for the present invention.
【Embodiment】
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
The present invention provides a kind of non-conductive layer breaking point method of testing on metalwork surface, and the principle of the method for testing is：
Metalwork holes is formed into holes point, and holes point is connected with anode, when the non-conductive layer on the surface of metalwork is damaged, that is, is occurred
Broken sun phenomenon, aluminium base is exposed in sodium chloride electrolysis matter solution, can be in the non-conductive of the surface equivalent to itself and anode series connection
The chemical reaction of water electrolysis occurs for the breaking point of layer, and hydrogen ion overflows (generation bubble phenomenon) in negative electrode (negative pole) generation hydrogen.
At anode (positive pole), hydroxide ion, which is gathered in breaking point (broken sun position), makes the phenolphthalein in solution redden；And non-damage location,
Due to the effect of aluminum oxide, will not occur electrochemical action, solution will not change colour.According to the principle, it is possible thereby to according to metal
The area for the point that part surface color reddens judges the quality of the non-conductive layer on the metalwork surface with quantity.
Referring to Fig. 1, the step flow of the non-conductive layer breaking point method of testing on the metalwork surface provided for the present invention
Figure.The non-conductive layer breaking point method of testing on the metalwork surface comprises the following steps：
S1, feed：There is provided surface has the metalwork of non-conductive layer.In the present embodiment, the metalwork is aluminium alloy
Shell, the non-conductive layer on its surface is alumina layer, is achieved in the coloring on the aluminum alloy casing surface, and improve metal simultaneously
Corrosion resistance, wearability and hardness of part etc..The metalwork of non-conductive layer exactly is coated with to this surface in the present embodiment
Performance is tested.
S2, offer electrolysis unit and electrolyte solution:The electrolysis unit include anode, negative electrode and respectively with the anode
The power supply connected with the negative electrode, the electrolyte solution is the sodium-chloride water solution comprising phenolphthalein reagent.
Specifically, the electrolyte solution is mixed to prepare by water, phenolphthalein reagent and sodium chloride.Wherein, water, phenolphthalein reagent
And the mass ratio of sodium chloride is 900~1100：20~40：1~3.By the water, phenolphthalein reagent and sodium chloride of above-mentioned mass ratio
Above-mentioned electrolyte solution can be obtained by stirring.It is preferred that, in the electrolyte solution, water, phenolphthalein reagent and sodium chloride
Mass ratio is 1000：300：2.In the present embodiment, the compound method of the phenolphthalein reagent is：8~10g phenolphthalein is taken, and should
Phenolphthalein is dissolved in 500mL 95% ethanol solution.
S3, composition electrolysis system：By metalwork holes formation holes point；The metalwork after holes is immersed into electricity
Electrolyte solution, while the anode is connected with the holes point of the metalwork, the negative electrode and the electrolyte solution contacts,
Constitute electrolysis system.
S4, test：Power-on makes the electrolysis system be powered, by the electrolyte solution for checking the metalwork surface
Discoloration determine the non-conductive layer breaking point on the surface of the metalwork.
In the present embodiment, the power supply is 12V~24V dc source, and electrolysis time is 10s~30s；It is described to become pornographic
Condition includes whether discoloration, and the area and quantity changed colour.In the testing procedure, if the electrolyte on the metalwork surface
Solution becomes red, then at position of the non-conductive layer on the metalwork surface with becoming the red electrolyte solution contacts
There is breaking point.The non-conductive of the metalwork surface is judged by the area and quantity of the red point for observing metalwork surface
The quality of layer, the i.e. breakage of the non-conductive layer on surface (is corroded) degree.If red area is larger and quantity is more, prove
The degree that is corroded of the metalwork is serious, therefore its anodic oxidation quality is not good.If red area is smaller and negligible amounts,
The metalwork is then proved by moderate corrosion, the anodic oxidation quality for being indicated above the sample is general.If red area very little
And quantity is seldom, illustrates the metalwork by slight erosion, the anodic oxidation quality for being indicated above sample is good.
Embodiments of the present invention are explained below in conjunction with specific embodiment.
Sample 1, sample 2 and sample 3：Sample 1, sample 2 and sample 3 are the aluminium of surface tool alumina layer (non-conductive layer)
Alloy shell.
Electrolyte solution：Sodium chloride solution containing phenolphthalein, wherein, the quality group of electrolyte solution turns into：Water：Phenolphthalein is tried
Agent：Sodium chloride=1000：20：2；
Equipment：Electrolysis unit.
Embodiment one,
Electrolyte solution：Sodium chloride solution containing phenolphthalein, wherein, the quality group of electrolyte solution turns into：Water：Phenolphthalein is tried
Agent：Sodium chloride=900：20：1.And phenolphthalein reagent is what is obtained by the way that 8g phenolphthalein to be dissolved to 500mL ethanol solution.
Testing procedure：Then sample 1 is immersed in electrolyte solution to, the holes of sample 1 formation holes point by electrolysis unit
Anode and power supply positive pole connection, the negative pole of the negative electrode of electrolysis unit and power supply is connected, then again by anode and holes point
Connection, negative electrode is connected with electrolyte solution contacts, turned on the power, and power supply is set into 24V DC power supply, starts to survey
The red area and quantity of observation sample after examination, 30s.It can be seen that, after 30s, occur on the surface of sample 1 red
Color, therefore tester can be according to the area and quantity of the red area come the damaged feelings of the non-conductive layer on the surface of judgement sample 1
Condition.
Embodiment two,
Electrolyte solution：Sodium chloride solution containing phenolphthalein, wherein, electrolyte solution reclaimed water, phenolphthalein reagent and chlorination
The mass ratio of sodium is 1000：30：2.And phenolphthalein reagent is what is obtained by the way that 8g phenolphthalein to be dissolved to 500mL ethanol solution.
Testing procedure：Then sample 2 is immersed in electrolyte solution to, the holes of sample 2 formation holes point by electrolysis unit
Anode and power supply positive pole connection, the negative pole of the negative electrode of electrolysis unit and power supply is connected, then again by anode and sample
Holes point is connected, and negative electrode is connected with electrolyte solution contacts, turned on the power, and power supply is set into 12V DC power supply, is opened
Begin to test the red area and quantity of observation sample shell after 10s.Using the dielectric solution of this proportioning after 10s
It was observed that the situation of the red area occurred on the surface of sample 2, therefore tester can be according to the area sum of the red area
Amount carrys out the breakage of the non-conductive layer on the surface of judgement sample 2.
Embodiment three,
Electrolyte solution：Sodium chloride solution containing phenolphthalein, wherein, electrolyte solution reclaimed water, phenolphthalein reagent and chlorination
The mass ratio of sodium is 1100：40：3.And phenolphthalein reagent is what is obtained by the way that 8g phenolphthalein to be dissolved to 500mL ethanol solution.
Testing procedure：Then sample 3 is immersed in electrolyte solution to, the holes of sample 3 formation holes point by electrolysis unit
Anode and power supply positive pole connection, the negative pole of the negative electrode of electrolysis unit and power supply is connected, then again by anode and sample
Holes point is connected, and negative electrode is connected with electrolyte solution contacts, turned on the power, and power supply is set into 12V DC power supply, is opened
Begin to test, the red area and quantity of observation sample shell after 20s.It can be seen that, after 20s, on the surface of sample 3
It is red through occurring, therefore tester can be according to the area and quantity of the red area come the non-conductive layer on the surface of judgement sample 3
Breakage.
The non-conductive layer breaking point method of testing on the metalwork surface that the present invention is provided has the advantages that：The present invention
By by metalwork holes formation holes point, the metalwork after holes being immersed into electrolyte solution, while by the anode
It is connected with the holes point of the metalwork, the negative electrode and the electrolyte solution contacts constitute electrolysis system；If metalwork table
The non-conductive layer in face then will not conducting electrolyte, electrolyte solution nondiscolouring, if the non-conductive layer tool on metalwork surface without breakage
Breaking point, then can occur the electrolyte solution around cell reaction, breaking point can become red, can after electrolysis system is powered
The non-conductive layer on the surface of the metalwork is determined by the discoloration for the electrolyte solution for checking the metalwork surface
Breaking point, judges the quality of the non-conductive layer on metalwork surface, i.e. its degree being corroded.The method of testing simple and fast, only
Need the weak location that 10~30s is the non-conductive layer that can detect that the surface, thus can in time in monitoring industrial processes quality
Fluctuation, realizes adjustment in time.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (8)
1. the non-conductive layer breaking point method of testing on a kind of metalwork surface, it is characterised in that this method comprises the following steps：
Feed：There is provided surface has the metalwork of non-conductive layer；
Electrolysis unit and electrolyte solution are provided:The electrolysis unit include anode, negative electrode and respectively with the anode and described
The power supply of negative electrode connection, the electrolyte solution is the sodium-chloride water solution comprising phenolphthalein reagent；
Constitute electrolysis system：By metalwork holes formation holes point；Metalwork immersion electrolyte after holes is molten
Liquid, while the anode is connected with the holes point of the metalwork, the negative electrode and the electrolyte solution contacts constitute electricity
Enzymatic hydrolysis system；
Test：Power-on makes the electrolysis system be powered, the discoloration of the electrolyte solution by checking the metalwork surface
Situation determines the breaking point of the non-conductive layer on the metalwork surface.
2. the non-conductive layer breaking point method of testing on metalwork surface according to claim 1, it is characterised in that described
In testing procedure, the discoloration includes whether discoloration, and the area and quantity changed colour.
3. the non-conductive layer breaking point method of testing on metalwork surface according to claim 2, it is characterised in that if described
The electrolyte solution on metalwork surface becomes red, then the non-conductive layer on the metalwork surface is with becoming the red electrolysis
There is breaking point at the position of matter solution contact.
4. the non-conductive layer breaking point method of testing on metalwork surface according to claim 1, it is characterised in that the electricity
Electrolyte solution is mixed to prepare by water, phenolphthalein reagent and sodium chloride；Wherein, the mass ratio of water, phenolphthalein reagent and sodium chloride is
900~1100：20~40：1~3.
5. the non-conductive layer breaking point method of testing on metalwork surface according to claim 4, it is characterised in that the electricity
In electrolyte solution, the mass ratio of water, phenolphthalein reagent and sodium chloride is 1000：30：2.
6. the non-conductive layer breaking point method of testing on metalwork surface according to claim 5, it is characterised in that the phenol
The compound method of phthalein reagent is：8~10g phenolphthalein is taken, and the phenolphthalein is dissolved in 500mL 95% ethanol solution.
7. the non-conductive layer breaking point method of testing on metalwork surface according to claim 1, it is characterised in that the survey
During try is rapid, the dc source that the power supply in electrolysis system is 12V~24V.
8. the non-conductive layer breaking point method of testing on metalwork surface according to claim 1, it is characterised in that the survey
During try is rapid, it is 10s~30s that electrolysis system, which carries out electrolysis time,.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932337A (en) * | 2017-12-18 | 2019-06-25 | 有研半导体材料有限公司 | A kind of device and method for evaluating silicon substrate back seal film compactness |
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| US5985983A (en) * | 1991-09-23 | 1999-11-16 | Sumitomo Electric Industries, Ltd. | Fluororesin coating composition |
| CN101587110A (en) * | 2009-04-24 | 2009-11-25 | 浙江长城电工科技有限公司 | Paint film cracking detection method of enamelled wire and detection apparatus |
| EP2698623A1 (en) * | 2011-04-12 | 2014-02-19 | JFE Steel Corporation | Method for evaluating corrosion resistance of molded can against content |
| CN104807870A (en) * | 2014-01-24 | 2015-07-29 | 珠海格力电器股份有限公司 | Method and apparatus for detecting compactness performance of container inner wall coating |
-
2016
- 2016-12-09 CN CN201611126970.1A patent/CN107037092A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5985983A (en) * | 1991-09-23 | 1999-11-16 | Sumitomo Electric Industries, Ltd. | Fluororesin coating composition |
| CN101587110A (en) * | 2009-04-24 | 2009-11-25 | 浙江长城电工科技有限公司 | Paint film cracking detection method of enamelled wire and detection apparatus |
| EP2698623A1 (en) * | 2011-04-12 | 2014-02-19 | JFE Steel Corporation | Method for evaluating corrosion resistance of molded can against content |
| CN104807870A (en) * | 2014-01-24 | 2015-07-29 | 珠海格力电器股份有限公司 | Method and apparatus for detecting compactness performance of container inner wall coating |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932337A (en) * | 2017-12-18 | 2019-06-25 | 有研半导体材料有限公司 | A kind of device and method for evaluating silicon substrate back seal film compactness |
| CN109932337B (en) * | 2017-12-18 | 2021-08-03 | 有研半导体硅材料股份公司 | Device and method for evaluating compactness of silicon-based back sealing film |
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