CN208860712U - Copper pipe ant nest corrosion testing apparatus - Google Patents
Copper pipe ant nest corrosion testing apparatus Download PDFInfo
- Publication number
- CN208860712U CN208860712U CN201821429696.XU CN201821429696U CN208860712U CN 208860712 U CN208860712 U CN 208860712U CN 201821429696 U CN201821429696 U CN 201821429696U CN 208860712 U CN208860712 U CN 208860712U
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- copper pipe
- container
- ant nest
- corrosion
- necking
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Abstract
The utility model provides copper pipe ant nest corrosion testing apparatus, comprising: copper pipe, the necking of copper pipe lower end form cone end at cone cell and welded closure, which has insulating paint；Container, is contained with formic acid aqueous solution, and the lower end edge container finish of copper pipe is inserted into container, has a gap with formic acid aqueous solution liquid level, and the upper end of copper pipe is exposed to container, and the contact site of copper pipe and container finish is sealed by sealing device；Air charging system with pressure gauge is docked with the upper port of copper pipe.The effect of the utility model is: the necking of copper pipe lower end prevents acid solution from will not guarantee the consistency of copper pipe test area state in the bottom aggregation of sample at cone cell and welded closure；Insulating paint is smeared in copper pipe sample necking position, can corrosion to avoid acid solution to this Working position, cause the leakage of this position, influence the judgement of test result, the formation mechenism for realistically simulating the corrosion of copper pipe ant nest is tested.
Description
Technical field
The utility model relates to the corrosion testing apparatus of copper pipe.
Background technique
A kind of Special Corrosion of air conditioner refrigerating copper pipe-ant nest corrosion, easily causes the leakage of copper pipe so as to cause air conditioner refrigerating
The premature failure of device finds that the micro- damage -form of this corrosion leakage, in the hole that below ground is beaten, causes corruption like ant
The main corrosion agent of erosion has formic acid (i.e. formic acid), therefore this corrosion is known as ant nest corrosion.The mechanism of ant nest corrosion is in tide
In wet atmosphere, carboxylic acid, which is acidified the water on copper surface and penetrates gaseous oxidation Copper thin film, hurts face, dissolves copper in the water on surface.Together
When monovalence copper complex is formed between water layer carboxylic acid and univalent copper ion, the compound in water passes through composite concentration, temperature
Localized variation is carried out with humidity to be precipitated from solution.The compound aoxidizes to form Cu2O and divalent copper complex, and catalysis reaction connects
It is continuous to occur and work.This cathode reaction is mainly redox reaction, is turned in the OH-ion that cathode zone generates to anode
It moves and diffusion generates Cu2O.The Cu2O can be cracked at the fragile position of pitting.Since the suction of thermal cycle can be such that oxygen wears
Thoroughly.The oxygen penetrated can aoxidize CuX, form Cu2O in small crater wall.The formation that this circular response has just promoted ant nest to corrode.
The sealing of most experimental rig in test copper pipe seals (or the horizontal installation of sample) with gum cover at present, gum cover seal location
(the horizontal installation bottom position of sample) has the aggregation of acid solution, and acid solution aggregation position is by acid solution fast erosion, and leakage point is usually herein
Portion leads to test failure.
Utility model content
The purpose of the utility model is to provide one kind can carry out the ant nest corrosion with air conditioner refrigerating copper pipe in relation to the copper of test
Pipe ant nest corrosion testing apparatus, copper pipe ant nest corrosion testing apparatus simulate ant nest corrosion mechanism to copper pipe ant nest corrosion test.
Copper pipe ant nest corrosion testing apparatus provided by the utility model, comprising: copper pipe, the necking of copper pipe lower end is at cone cell and welds
Closing is connect, cone end is formed, which has insulating paint；Container is contained with formic acid aqueous solution, copper pipe
Lower end edge container finish is inserted into container, has gap with formic acid aqueous solution liquid level, the upper end of copper pipe is exposed to container, copper pipe and container
The contact site of bottleneck is sealed by sealing device；Air charging system with pressure gauge is docked with the upper port of copper pipe.
The effect of the utility model is: the necking of copper pipe lower end prevents acid solution will not be in sample at cone cell and welded closure
Bottom aggregation, guarantee copper pipe test area state consistency；Insulating paint is smeared in copper pipe sample necking position, can be to avoid
Corrosion of the acid solution to this Working position, causes the leakage of this position, influences the judgement of test result.Utility model device simulation
The formation mechenism of copper pipe ant nest corrosion is tested, and test result can show the acid of the resistance to ant nest corrosion of the copper pipe of unlike material
Change degree is different.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model copper pipe ant nest corrosion testing apparatus.
Specific embodiment
In the following, the utility model is described further in conjunction with attached drawing and specific embodiment,
In conjunction with Fig. 1, copper pipe ant nest corrosion testing apparatus provided by the utility model, comprising: tested copper pipe 1, copper pipe 1
Lower end necking forms cone end 2 at cone cell and welded closure, which has insulating paint；Container 3 is contained
It is placed with formic acid aqueous solution 4, container 3 is inserted into along container finish in lower end, that is, cone end 2 of copper pipe 1, with 4 liquid level of formic acid aqueous solution
There is a gap, the upper end of copper pipe is exposed to container, and the contact site of copper pipe and container finish is by the polytetrafluoroethyl-ne as sealing device 5
Alkene joint sealing；Air charging system 6 with pressure gauge 61, is docked with the upper port of copper pipe, and 5-20bar nitrogen pressure is added to copper pipe
Power.Copper pipe ant nest corrosion testing apparatus is put into insulating box, 40 degree of constant temperature are tested.Since the necking of copper pipe lower end is at cone cell
And welded closure, it can prevent acid solution in the bottom aggregation of sample in this way, guarantee the consistency of copper pipe test area state；Copper pipe sample
Insulating paint is smeared in product necking position, can corrosion to avoid acid solution to this Working position, cause the leakage of this position, influence to try
Test the judgement of result.Utility model device is conducive to accurately to simulate the formation mechenism of copper pipe ant nest corrosion, and (formic acid is dense
Degree, the processing etc. of test specimen) it is tested, test result can show the acidification journey of the resistance to ant nest corrosion of the copper pipe of unlike material
Degree is different.
It is tested using test copper pipe 1 of the utility model experimental rig to unlike material, test result can be seen that
The acidizing degree of the resistance to ant nest corrosion of oxygen-free copper material copper pipe is better than phosphorized copper sample, is as follows:
It will be apparent to those skilled in the art that can make various other according to the above description of the technical scheme and ideas
Corresponding change and deformation, and all these changes and deformation all should belong to the protection of the utility model claims
Within the scope of.
Claims (2)
1. copper pipe ant nest corrosion testing apparatus, comprising: copper pipe, it is characterized in that the necking of copper pipe lower end is at cone cell and welded closure, shape
At cone end, which has insulating paint；Container, is contained with formic acid aqueous solution, and the lower end edge of copper pipe holds
Device bottleneck is inserted into container, has a gap with formic acid aqueous solution liquid level, and the upper end of copper pipe is exposed to container, and copper pipe and container finish connect
Contact portion position is sealed by sealing device；Air charging system with pressure gauge is docked with the upper port of copper pipe.
2. copper pipe ant nest corrosion testing apparatus according to claim 1, which is characterized in that sealing device is polytetrafluoroethylene (PTFE)
Connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821429696.XU CN208860712U (en) | 2018-09-01 | 2018-09-01 | Copper pipe ant nest corrosion testing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821429696.XU CN208860712U (en) | 2018-09-01 | 2018-09-01 | Copper pipe ant nest corrosion testing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208860712U true CN208860712U (en) | 2019-05-14 |
Family
ID=66416597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821429696.XU Active CN208860712U (en) | 2018-09-01 | 2018-09-01 | Copper pipe ant nest corrosion testing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208860712U (en) |
-
2018
- 2018-09-01 CN CN201821429696.XU patent/CN208860712U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Wencheng Inventor after: Lang Yanping Inventor before: Li Wencheng Inventor before: Lang Yanping |