CN107723724A - A kind of air-conditioning system pipeline part acid washing passivation technology - Google Patents
A kind of air-conditioning system pipeline part acid washing passivation technology Download PDFInfo
- Publication number
- CN107723724A CN107723724A CN201710711383.7A CN201710711383A CN107723724A CN 107723724 A CN107723724 A CN 107723724A CN 201710711383 A CN201710711383 A CN 201710711383A CN 107723724 A CN107723724 A CN 107723724A
- Authority
- CN
- China
- Prior art keywords
- air
- conditioning system
- system pipeline
- pipeline part
- acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/78—Pretreatment of the material to be coated
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/10—Other heavy metals
- C23G1/103—Other heavy metals copper or alloys of copper
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/20—Other heavy metals
Abstract
The present invention relates to a kind of air-conditioning system pipeline part acid washing passivation technology, belongs to air-conditioning system pipeline part technical field, comprises the following steps：S1：First use stainless steel wire brush or emery wheel deburring；S2：Air-conditioning system pipeline part after step S1 processing is put into alkali wash water；S3：It is fully dried with after warm water washing；S4：Air-conditioning system pipeline part after drying is immersed in the pickle that temperature is 21 DEG C 60 DEG C；S5：It is fully dried after being cleaned completely with deionized water；S6：At room temperature, air-conditioning system pipeline part is immersed in passivating solution and soaked 30 60 minutes；S7：It is with warm water that air-conditioning system pipeline part surface washing is clean.The beneficial effects of the invention are as follows：The processing mode is simple to operate, and processing is reasonable, and process cycle is short, is adapted to popularize, and passivating solution is reusable, significantly reduces production cost.
Description
Technical field
The present invention relates to copper pipe surface processing technology field, more particularly to a kind of air-conditioning system pipeline part acid wash passivation work
Skill.
Background technology
Most use of refrigerator system pipeline fitting is all copper pipe, copper and copper alloy good welding performance, easy processing, surface U.S.
See, have become industrial second largest metal material at present, be only second to steel.Copper and copper alloy Aero-Space, packaging for foodstuff,
The fields such as building decoration, electronic appliance, communications and transportation have to be widely applied very much.In the prior art, copper and copper alloy are in air
In easily easily oxidation blackening, copper pipe mechanical strength after blackening is bad, non-refractory, and corrosion resistance is poor；The table of prior art
Face handling process is more complicated, and processing cost is high, is not suitable for being widely popularized and utilizes.
The content of the invention
In order to solve the above technical problems, one aspect of the present invention is：A kind of air-conditioning system pipe is provided
Road part acid washing passivation technology.
The purpose of the present invention is achieved through the following technical solutions：A kind of air-conditioning system pipeline part acid wash passivation work
Skill, comprise the following steps：
S1：Stainless steel wire brush or emery wheel deburring are first used, then air-conditioning system pipeline part surface is subjected to burnishing part using sandblasting
Reason, remove air-conditioning system pipeline part surface smut and oxide layer；
S2：Air-conditioning system pipeline part after step S1 processing is put into alkali wash water, alkali wash water is that concentration is 3%-5%
NaOH solution, temperature are 50 DEG C -70 DEG C, and the duration is the 30-60 seconds；
S3：It is fully dried with after warm water washing；
S4：Air-conditioning system pipeline part after drying is immersed in the pickle that temperature is 21 DEG C -60 DEG C, duration 15-30
Minute；
S5：It is fully dried after being cleaned completely with deionized water；
S6：At room temperature, air-conditioning system pipeline part is immersed in immersion 30-60 minutes in passivating solution；
S7：It is with warm water that air-conditioning system pipeline part surface washing is clean, flushing surface then is tested with acid litmus paper, pH value is
Between 6.5-7.5, finally dried up with compressed air.
Preferably, the pickle is the solution formed by the hydrofluoric acid configuration of 15%-20% nitric acid and 3%-8%.
Preferably, the passivating solution be by 3%-8% nitric acid and 1-6g/100ml potassium bichromate configuration form it is molten
Liquid.
Preferably, the sand that the sandblasting uses is pure silicon or aluminum oxide.
The beneficial effects of the invention are as follows：The present invention is removed surface and oil contaminant using alkali cleaning mode to air-conditioning system pipeline part,
Finally it is passivated processing so that air-conditioning system pipeline part obtains higher corrosion resistance, improves air-conditioning system pipeline part
Practical performance, the processing mode is simple to operate, and processing is reasonable, and process cycle is short, is adapted to popularize, passivating solution repeats
Use, significantly reduce production cost.
Embodiment
The present invention will be further described below, but protection scope of the present invention be not limited to it is as described below.
Embodiment 1
A kind of air-conditioning system pipeline part acid washing passivation technology, comprises the following steps：
S1：Stainless steel wire brush or emery wheel deburring are first used, then air-conditioning system pipeline part surface is subjected to burnishing part using sandblasting
Reason, remove air-conditioning system pipeline part surface smut and oxide layer；
S2：Air-conditioning system pipeline part after step S1 processing is put into alkali wash water, alkali wash water is that concentration is 3.5%
NaOH solution, temperature are 55 DEG C, and the duration is 35 seconds；
S3：It is fully dried with after warm water washing；
S4：Air-conditioning system pipeline part after drying is immersed in the pickle that temperature is 30 DEG C, the duration is 25 minutes；
S5：It is fully dried after being cleaned completely with deionized water；
S6：At room temperature, air-conditioning system pipeline part is immersed in passivating solution and soaked 35 minutes；
S7：It is with warm water that air-conditioning system pipeline part surface washing is clean, flushing surface then is tested with acid litmus paper, pH value is
6.8, finally dried up with compressed air.
Air-conditioning system pipeline part after Passivation Treatment takes the test block of same batch processing to do nitre in the iris based on rose-red
Acid solution drop is tested, and described salpeter solution is 50% salpeter solution, and the anti-corrosion time is 8 seconds, the passivation of air-conditioning system pipeline part
It is qualified to handle.
Embodiment 2
A kind of air-conditioning system pipeline part acid washing passivation technology, comprises the following steps：
S1：Stainless steel wire brush or emery wheel deburring are first used, then air-conditioning system pipeline part surface is subjected to burnishing part using sandblasting
Reason, remove air-conditioning system pipeline part surface smut and oxide layer；
S2：Air-conditioning system pipeline part after step S1 processing is put into alkali wash water, alkali wash water is the NaOH that concentration is 4%
Solution, temperature are 60 DEG C, and the duration is 45 seconds；
S3：It is fully dried with after warm water washing；
S4：Air-conditioning system pipeline part after drying is immersed in the pickle that temperature is 50 DEG C, the duration is 20 minutes；
S5：It is fully dried after being cleaned completely with deionized water；
S6：At room temperature, air-conditioning system pipeline part is immersed in passivating solution and soaked 45 minutes；
S7：It is with warm water that air-conditioning system pipeline part surface washing is clean, flushing surface then is tested with acid litmus paper, pH value is
7.2, finally dried up with compressed air.
Air-conditioning system pipeline part after Passivation Treatment takes the test block of same batch processing to do nitre in the iris based on rose-red
Acid solution drop is tested, and described salpeter solution is 50% salpeter solution, and the anti-corrosion time is 10 seconds, and air-conditioning system pipeline part is blunt
It is qualified to change processing.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, there can be various modifications and variations in the spirit and principles in the present invention, these equivalent modifications or replacement etc.,
It is all contained within protection scope of the present invention.
Claims (4)
- A kind of 1. air-conditioning system pipeline part acid washing passivation technology, it is characterised in that：Comprise the following steps：S1：Stainless steel wire brush or emery wheel deburring are first used, then air-conditioning system pipeline part surface is subjected to burnishing part using sandblasting Reason, remove air-conditioning system pipeline part surface smut and oxide layer；S2：Air-conditioning system pipeline part after step S1 processing is put into alkali wash water, alkali wash water is that concentration is 3%-5% NaOH solution, temperature are 50 DEG C -70 DEG C, and the duration is the 30-60 seconds；S3：It is fully dried with after warm water washing；S4：Air-conditioning system pipeline part after drying is immersed in the pickle that temperature is 21 DEG C -60 DEG C, duration 15-30 Minute；S5：It is fully dried after being cleaned completely with deionized water；S6：At room temperature, air-conditioning system pipeline part is immersed in immersion 30-60 minutes in passivating solution；S7：It is with warm water that air-conditioning system pipeline part surface washing is clean, flushing surface then is tested with acid litmus paper, pH value is Between 6.5-7.5, finally dried up with compressed air.
- 2. air-conditioning system pipeline part acid washing passivation technology according to claim 1, it is characterised in that：The pickle be by The solution that the hydrofluoric acid configuration of 15%-20% nitric acid and 3%-8% forms.
- 3. air-conditioning system pipeline part acid washing passivation technology according to claim 1, it is characterised in that：The passivating solution be by The solution that the potassium bichromate configuration of 3%-8% nitric acid and 1-6g/100ml forms.
- 4. air-conditioning system pipeline part acid washing passivation technology according to claim 1, it is characterised in that：What the sandblasting used Sand is pure silicon or aluminum oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710711383.7A CN107723724A (en) | 2017-08-18 | 2017-08-18 | A kind of air-conditioning system pipeline part acid washing passivation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710711383.7A CN107723724A (en) | 2017-08-18 | 2017-08-18 | A kind of air-conditioning system pipeline part acid washing passivation technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107723724A true CN107723724A (en) | 2018-02-23 |
Family
ID=61204774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710711383.7A Withdrawn CN107723724A (en) | 2017-08-18 | 2017-08-18 | A kind of air-conditioning system pipeline part acid washing passivation technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107723724A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109609938A (en) * | 2018-12-06 | 2019-04-12 | 苏州康索机电有限公司 | A kind of method of cast(ing) surface passivation |
| CN110479693A (en) * | 2019-08-15 | 2019-11-22 | 安徽省矿业机电装备有限责任公司 | A kind of fluid-through tube bore area treatment process |
| CN115572979A (en) * | 2022-10-08 | 2023-01-06 | 景德镇华信航空科技装备有限公司 | Surface treatment process and device for aviation parts |
-
2017
- 2017-08-18 CN CN201710711383.7A patent/CN107723724A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109609938A (en) * | 2018-12-06 | 2019-04-12 | 苏州康索机电有限公司 | A kind of method of cast(ing) surface passivation |
| CN110479693A (en) * | 2019-08-15 | 2019-11-22 | 安徽省矿业机电装备有限责任公司 | A kind of fluid-through tube bore area treatment process |
| CN115572979A (en) * | 2022-10-08 | 2023-01-06 | 景德镇华信航空科技装备有限公司 | Surface treatment process and device for aviation parts |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180223 |
|
| WW01 | Invention patent application withdrawn after publication |