CN113549925A - Brazing aluminum piece cleaning process - Google Patents
Brazing aluminum piece cleaning process Download PDFInfo
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- CN113549925A CN113549925A CN202110833608.2A CN202110833608A CN113549925A CN 113549925 A CN113549925 A CN 113549925A CN 202110833608 A CN202110833608 A CN 202110833608A CN 113549925 A CN113549925 A CN 113549925A
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- workpiece
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- washing
- cleaning process
- acid
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- 238000004140 cleaning Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008569 process Effects 0.000 title claims abstract description 31
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 238000005219 brazing Methods 0.000 title claims description 33
- 238000005406 washing Methods 0.000 claims abstract description 43
- 239000012445 acidic reagent Substances 0.000 claims abstract description 38
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000126 substance Substances 0.000 claims abstract description 28
- 239000002253 acid Substances 0.000 claims abstract description 27
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims abstract description 16
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 claims abstract description 16
- 229910000342 sodium bisulfate Inorganic materials 0.000 claims abstract description 16
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 15
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 15
- 239000011734 sodium Substances 0.000 claims abstract description 15
- 238000007689 inspection Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 55
- 239000007788 liquid Substances 0.000 claims description 22
- 239000008213 purified water Substances 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 21
- 238000005237 degreasing agent Methods 0.000 claims description 20
- 239000013527 degreasing agent Substances 0.000 claims description 20
- 238000005554 pickling Methods 0.000 claims description 16
- 238000005238 degreasing Methods 0.000 claims description 9
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 9
- 239000012459 cleaning agent Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 claims description 7
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 2
- 238000011012 sanitization Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- -1 sodium fluorosilicate Chemical compound 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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
- 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
- C23G1/12—Light metals
- C23G1/125—Light metals aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/023—Cleaning the external surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2209/00—Details of machines or methods for cleaning hollow articles
- B08B2209/02—Details of apparatuses or methods for cleaning pipes or tubes
Abstract
The invention relates to the technical field of cleaning welded pipelines, which is used for improving the brightness of the surface of the welded pipeline and avoiding the situation of blockage in the using process, in particular to a cleaning process of a brazed aluminum piece, which comprises the following process steps of ultrasonic oil removal, primary washing, chemical oil removal, secondary washing, acid washing, tertiary washing and inspection, wherein an acid reagent used for acid washing comprises chromic anhydride, sodium fluosilicate, sodium bisulfate and sodium dodecyl sulfate; the problem of current air conditioner pipeline cleaning process after the washing in addition the pipeline inner wall have the attachment, the surperficial luminance is not enough, the pipeline is used for a long time and is stopped up easily, has the potential safety hazard is solved, adopt the cleaning process of this application to wash the air conditioner pipeline after the welding, pipeline surface luminance meets the requirements, the pipeline inner wall sanitization does not have the pipeline to block up in long-time the use, this cleaning process is also very simple moreover.
Description
Technical Field
The invention relates to the technical field of cleaning of welded pipelines, and particularly relates to a cleaning process of a brazed aluminum piece, which is used for improving the brightness of the surface of the welded pipeline and avoiding the blockage in the use process.
Background
The brazing method is characterized in that after brazing filler metal and a weldment which are lower than the melting point of the weldment are heated to the melting temperature of the brazing filler metal at the same time, the liquid brazing filler metal is used for filling gaps of solid workpieces to connect metals, during brazing, an oxide film and oil stains on a contact surface of a base metal are removed firstly, so that capillaries can play a role after the brazing filler metal is melted, the wettability and capillary fluidity of the brazing filler metal are increased, the brazing deformation is small, the joint is smooth and attractive, and the method is suitable for welding components which are precise, complex and consist of different materials.
After the air conditioner pipeline is welded, the air conditioner pipeline needs to be cleaned for beauty or because the internal pipeline has attachments, the welded pipeline is cleaned by using alkali solution at present, but after the air conditioner pipeline is cleaned by adopting the method, brazing flux is remained on the appearance of the pipeline, the attachments on the inner wall of the pipeline are not cleaned, and the attractiveness and the subsequent use are influenced; the surface brightness is not enough, the pipeline is easy to block after long-time use, the using effect of the air conditioner is poor, the compressor is burnt out, and potential safety hazards exist.
Disclosure of Invention
The application provides a brazing aluminum part cleaning process to the problem that the pipeline inner wall of the existing air conditioner pipeline cleaning process after cleaning has attachments and insufficient surface brightness, and the pipeline is easy to block up and has potential safety hazards after being used for a long time.
The technical scheme provided by the invention is a brazing aluminum piece cleaning process, which specifically comprises the following steps:
(1) ultrasonic oil removal: smearing the ultrasonic cleaning agent on the workpiece by using a rag, and then putting the workpiece into an ultrasonic machine;
(2) first water washing: cleaning the workpiece treated in the step (1) with purified water, and removing surface residual liquid;
(3) chemical oil removal: cleaning the workpiece washed by the water in the step (2) by using a chemical degreasing agent, and immersing the workpiece into a degreasing tank filled with the chemical degreasing agent by using a hanging basket or a hanger;
(4) and (3) second water washing: cleaning the workpiece treated in the step (3) with purified water, and removing residual liquid on the surface;
(5) acid washing: cleaning the workpiece treated in the step (4) by using an acid reagent to remove the residues and the surface oxide layer of the brazing;
(6) and (3) washing for the third time: cleaning the workpiece treated in the step (5) with purified water, and removing residual liquid on the surface of the workpiece;
(7) and (3) delivery and inspection: and (3) detecting the workpiece treated by the six steps, wherein the workpiece has no dirt on the appearance, uniform and consistent surface color and no over-corrosion phenomenon, and is a cleaned qualified product.
Through the technical scheme, the cleaning process carries out ultrasonic cleaning, chemical degreasing agent cleaning and acid washing on the workpiece respectively, and after each cleaning, purified water is used for removing residues on the surface, so that the cleaning process in no step can achieve the best cleaning effect, the influence of cross mixing among cleaning machines on the final cleaning effect is avoided, the brightness of the air conditioner pipeline surface cleaned by the cleaning process meets the requirement, the inner wall of the pipeline is cleaned, and the pipeline is not blocked in long-time use.
Further, the acid reagent used in the step (5) comprises chromic anhydride, sodium fluosilicate, sodium bisulfate and sodium dodecyl sulfate.
Further, the concentration of each component in the acid reagent used in the step (5) is as follows: 55-65g/L chromic anhydride, 8-13g/L sodium fluosilicate, 25-35g/L sodium bisulfate and 0.5-1.5g/L sodium dodecyl sulfate.
Further, the concentration of each component in the acid reagent used in the step (5) is as follows: 58-62g/L chromic anhydride, 10-12g/L sodium fluosilicate, 28-32g/L sodium bisulfate and 0.8-1.2g/L sodium dodecyl sulfate.
Further, the concentration of each component in the acid reagent used in the step (5) is as follows: 60g/L chromic anhydride, 11g/L sodium fluosilicate, 30g/L sodium bisulfate and 1.0g/L sodium dodecyl sulfate.
The acid reagent of this application passes through the synergism between chromic anhydride, sodium fluorosilicate, sodium bisulfate, the sodium dodecyl sulfate, makes the cleaning performance of acid reagent to the work piece better, compares through the quantity between each component of control simultaneously, has still avoided the waste of raw materials when having improved the cleaning performance, has reduced the cost of manufacture of acid reagent.
Furthermore, the preparation method of the acid reagent used in the step (5) comprises the following steps: firstly measuring the working volume of a pickling tank, calculating the amount of acid required, injecting half-tank water into the pickling tank, slowly pouring the acid, stirring simultaneously, adding water to the working volume after stirring uniformly or completely dissolving, stirring uniformly, measuring the pH value of the tank liquor to be more than or equal to 4, and cooling to the working temperature for use.
Furthermore, when the pickling tank is turbid, the acid reagent is reconfigured according to the acid reagent configuration method, and turbid tank liquor is replaced.
Further, the temperature of the chemical degreasing agent is controlled to be 50-70 ℃ when the chemical degreasing agent is used for cleaning the workpiece in the step (3).
Furthermore, ultrasonic degreasing, primary washing, secondary washing, acid washing and tertiary washing are all carried out in a normal temperature environment.
Based on the explanation, compared with the prior art, the technical scheme of the application has the advantages that:
(1) the cleaning process of the invention respectively carries out ultrasonic cleaning, chemical degreasing agent cleaning and acid cleaning on the workpiece, and after each cleaning, pure water is used for removing the residues on the surface, so that the cleaning process without one step can achieve the best cleaning effect, and the influence of cross mixing among cleaning machines on the final cleaning effect is avoided;
(2) the acid reagent disclosed by the invention has the advantages that the workpiece cleaning effect of the acid reagent is better under the synergistic action of chromic anhydride, sodium fluosilicate, sodium bisulfate and sodium dodecyl sulfate, the cleaning effect is improved, the waste of raw materials is avoided and the manufacturing cost of the acid reagent is reduced by controlling the dosage ratio of the components.
Detailed Description
Example 1
A brazing aluminum piece cleaning process specifically comprises the following steps:
(1) ultrasonic oil removal: smearing the ultrasonic cleaning agent on the workpiece by using a rag, and then putting the workpiece into an ultrasonic machine;
(2) first water washing: cleaning the workpiece treated in the step (1) with purified water, and removing surface residual liquid;
(3) chemical oil removal: cleaning the workpiece washed by the water in the step (2) at the temperature of 50 ℃ by using a chemical degreasing agent, and immersing the workpiece into a degreasing tank filled with the chemical degreasing agent by using a hanging basket or a hanger;
(4) and (3) second water washing: cleaning the workpiece treated in the step (3) with purified water, and removing residual liquid on the surface;
(5) acid washing: cleaning the workpiece treated in the step (4) by using an acid reagent to remove the brazing surface residues and the surface oxide layer, wherein the concentration of each component in the acid reagent is as follows: 55g/L of chromic anhydride, 8g/L of sodium fluosilicate, 25g/L of sodium bisulfate and 0.5g/L of sodium dodecyl sulfate; the preparation method of the acid reagent comprises the following steps: firstly measuring the working volume of a pickling tank, calculating the amount of required acid, injecting half-tank water into the pickling tank, slowly pouring the acid, stirring simultaneously, adding water to the working volume after stirring uniformly or completely dissolving, stirring uniformly, measuring the pH value of a tank liquor to be more than or equal to 4, and cooling to the working temperature for use;
(6) and (3) washing for the third time: cleaning the workpiece treated in the step (5) with purified water, and removing residual liquid on the surface of the workpiece;
(7) and (3) delivery and inspection: and (3) detecting the workpiece treated by the six steps, wherein the workpiece has no dirt on the appearance, uniform and consistent surface color and no over-corrosion phenomenon, and is a cleaned qualified product.
Example 2
A brazing aluminum piece cleaning process specifically comprises the following steps:
(1) ultrasonic oil removal: smearing the ultrasonic cleaning agent on the workpiece by using a rag, and then putting the workpiece into an ultrasonic machine;
(2) first water washing: cleaning the workpiece treated in the step (1) with purified water, and removing surface residual liquid;
(3) chemical oil removal: cleaning the workpiece washed in the step (2) at 55 ℃ by using a chemical degreasing agent, and immersing the workpiece into a degreasing tank filled with the chemical degreasing agent by using a hanging basket or a hanger;
(4) and (3) second water washing: cleaning the workpiece treated in the step (3) with purified water, and removing residual liquid on the surface;
(5) acid washing: cleaning the workpiece treated in the step (4) by using an acid reagent to remove the brazing surface residues and the surface oxide layer, wherein the concentration of each component in the acid reagent is as follows: 65g/L chromic anhydride, 13g/L sodium fluosilicate, 35g/L sodium bisulfate and 1.5g/L sodium dodecyl sulfate; the preparation method of the acid reagent comprises the following steps: firstly measuring the working volume of a pickling tank, calculating the amount of required acid, injecting half-tank water into the pickling tank, slowly pouring the acid, stirring simultaneously, adding water to the working volume after stirring uniformly or completely dissolving, stirring uniformly, measuring the pH value of a tank liquor to be more than or equal to 4, and cooling to the working temperature for use;
(6) and (3) washing for the third time: cleaning the workpiece treated in the step (5) with purified water, and removing residual liquid on the surface of the workpiece;
(7) and (3) delivery and inspection: and (3) detecting the workpiece treated by the six steps, wherein the workpiece has no dirt on the appearance, uniform and consistent surface color and no over-corrosion phenomenon, and is a cleaned qualified product.
Example 3
A brazing aluminum piece cleaning process specifically comprises the following steps:
(1) ultrasonic oil removal: smearing the ultrasonic cleaning agent on the workpiece by using a rag, and then putting the workpiece into an ultrasonic machine;
(2) first water washing: cleaning the workpiece treated in the step (1) with purified water, and removing surface residual liquid;
(3) chemical oil removal: cleaning the workpiece washed in the step (2) at the temperature of 60 ℃ by using a chemical degreasing agent, and immersing the workpiece into a degreasing tank filled with the chemical degreasing agent by using a hanging basket or a hanger;
(4) and (3) second water washing: cleaning the workpiece treated in the step (3) with purified water, and removing residual liquid on the surface;
(5) acid washing: cleaning the workpiece treated in the step (4) by using an acid reagent to remove the brazing surface residues and the surface oxide layer, wherein the concentration of each component in the acid reagent is as follows: 58g/L chromic anhydride, 10g/L sodium fluosilicate, 28g/L sodium bisulfate and 0.8g/L sodium dodecyl sulfate; the preparation method of the acid reagent comprises the following steps: firstly measuring the working volume of a pickling tank, calculating the amount of required acid, injecting half-tank water into the pickling tank, slowly pouring the acid, stirring simultaneously, adding water to the working volume after stirring uniformly or completely dissolving, stirring uniformly, measuring the pH value of a tank liquor to be more than or equal to 4, and cooling to the working temperature for use;
(6) and (3) washing for the third time: cleaning the workpiece treated in the step (5) with purified water, and removing residual liquid on the surface of the workpiece;
(7) and (3) delivery and inspection: and (3) detecting the workpiece treated by the six steps, wherein the workpiece has no dirt on the appearance, uniform and consistent surface color and no over-corrosion phenomenon, and is a cleaned qualified product.
Example 4
A brazing aluminum piece cleaning process specifically comprises the following steps:
(1) ultrasonic oil removal: smearing the ultrasonic cleaning agent on the workpiece by using a rag, and then putting the workpiece into an ultrasonic machine;
(2) first water washing: cleaning the workpiece treated in the step (1) with purified water, and removing surface residual liquid;
(3) chemical oil removal: cleaning the workpiece washed in the step (2) at 65 ℃ by using a chemical degreasing agent, and immersing the workpiece into a degreasing tank filled with the chemical degreasing agent by using a hanging basket or a hanger;
(4) and (3) second water washing: cleaning the workpiece treated in the step (3) with purified water, and removing residual liquid on the surface;
(5) acid washing: cleaning the workpiece treated in the step (4) by using an acid reagent to remove the brazing surface residues and the surface oxide layer, wherein the concentration of each component in the acid reagent is as follows: 62g/L of chromic anhydride, 12g/L of sodium fluosilicate, 32g/L of sodium bisulfate and 1.2g/L of sodium dodecyl sulfate; the preparation method of the acid reagent comprises the following steps: firstly measuring the working volume of a pickling tank, calculating the amount of required acid, injecting half-tank water into the pickling tank, slowly pouring the acid, stirring simultaneously, adding water to the working volume after stirring uniformly or completely dissolving, stirring uniformly, measuring the pH value of a tank liquor to be more than or equal to 4, and cooling to the working temperature for use;
(6) and (3) washing for the third time: cleaning the workpiece treated in the step (5) with purified water, and removing residual liquid on the surface of the workpiece;
(7) and (3) delivery and inspection: and (3) detecting the workpiece treated by the six steps, wherein the workpiece has no dirt on the appearance, uniform and consistent surface color and no over-corrosion phenomenon, and is a cleaned qualified product.
Example 5
A brazing aluminum piece cleaning process specifically comprises the following steps:
(1) ultrasonic oil removal: smearing the ultrasonic cleaning agent on the workpiece by using a rag, and then putting the workpiece into an ultrasonic machine;
(2) first water washing: cleaning the workpiece treated in the step (1) with purified water, and removing surface residual liquid;
(3) chemical oil removal: cleaning the workpiece washed by the water in the step (2) at the temperature of 70 ℃ by using a chemical degreasing agent, and immersing the workpiece into a degreasing tank filled with the chemical degreasing agent by using a hanging basket or a hanger;
(4) and (3) second water washing: cleaning the workpiece treated in the step (3) with purified water, and removing residual liquid on the surface;
(5) acid washing: cleaning the workpiece treated in the step (4) by using an acid reagent to remove the brazing surface residues and the surface oxide layer, wherein the concentration of each component in the acid reagent is as follows: 60g/L chromic anhydride, 11g/L sodium fluosilicate, 30g/L sodium bisulfate and 1.0g/L sodium dodecyl sulfate; the preparation method of the acid reagent comprises the following steps: firstly measuring the working volume of a pickling tank, calculating the amount of required acid, injecting half-tank water into the pickling tank, slowly pouring the acid, stirring simultaneously, adding water to the working volume after stirring uniformly or completely dissolving, stirring uniformly, measuring the pH value of a tank liquor to be more than or equal to 4, and cooling to the working temperature for use;
(6) and (3) washing for the third time: cleaning the workpiece treated in the step (5) with purified water, and removing residual liquid on the surface of the workpiece;
(7) and (3) delivery and inspection: and (3) detecting the workpiece treated by the six steps, wherein the workpiece has no dirt on the appearance, uniform and consistent surface color and no over-corrosion phenomenon, and is a cleaned qualified product.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (9)
1. The brazing aluminum piece cleaning process is characterized by comprising the following steps:
(1) ultrasonic oil removal: smearing the ultrasonic cleaning agent on the workpiece by using a rag, and then putting the workpiece into an ultrasonic machine;
(2) first water washing: cleaning the workpiece treated in the step (1) with purified water, and removing surface residual liquid;
(3) chemical oil removal: cleaning the workpiece washed by the water in the step (2) by using a chemical degreasing agent, and immersing the workpiece into a degreasing tank filled with the chemical degreasing agent by using a hanging basket or a hanger;
(4) and (3) second water washing: cleaning the workpiece treated in the step (3) with purified water, and removing residual liquid on the surface;
(5) acid washing: cleaning the workpiece treated in the step (4) by using an acid reagent to remove the residues and the surface oxide layer of the brazing;
(6) and (3) washing for the third time: cleaning the workpiece treated in the step (5) with purified water, and removing residual liquid on the surface of the workpiece;
(7) and (3) delivery and inspection: and (3) detecting the workpiece treated by the six steps, wherein the workpiece has no dirt on the appearance, uniform and consistent surface color and no over-corrosion phenomenon, and is a cleaned qualified product.
2. The cleaning process for the brazing aluminum part, according to claim 1, wherein the acid reagent used in the step (5) comprises chromic anhydride, sodium fluosilicate, sodium bisulfate and sodium dodecyl sulfate.
3. The cleaning process for the brazing aluminum piece according to claim 2, wherein the acid reagent used in the step (5) has the following concentration: 55-65g/L chromic anhydride, 8-13g/L sodium fluosilicate, 25-35g/L sodium bisulfate and 0.5-1.5g/L sodium dodecyl sulfate.
4. The cleaning process for the brazing aluminum piece according to claim 3, wherein the acid reagent used in the step (5) has the following concentration: 58-62g/L chromic anhydride, 10-12g/L sodium fluosilicate, 28-32g/L sodium bisulfate and 0.8-1.2g/L sodium dodecyl sulfate.
5. The cleaning process for the brazing aluminum member according to claim 3 or 4, wherein the acid reagent used in the step (5) has the following concentration: 60g/L chromic anhydride, 11g/L sodium fluosilicate, 30g/L sodium bisulfate and 1.0g/L sodium dodecyl sulfate.
6. The cleaning process for the brazing aluminum piece according to claim 3 or 4, wherein the acid reagent used in the step (5) is prepared by the following method: firstly measuring the working volume of a pickling tank, calculating the amount of acid required, injecting half-tank water into the pickling tank, slowly pouring the acid, stirring simultaneously, adding water to the working volume after stirring uniformly or completely dissolving, stirring uniformly, measuring the pH value of the tank liquor to be more than or equal to 4, and cooling to the working temperature for use.
7. The cleaning process for the brazing aluminum part as recited in claim 6, wherein when the pickling tank is turbid, the acid reagent is reconfigured according to the acid reagent configuration method, and the turbid tank liquor is replaced.
8. The cleaning process for the brazing aluminum member according to claim 1, wherein the temperature of the chemical degreasing agent is controlled to be 50-70 ℃ when the chemical degreasing agent is used for cleaning the workpiece in the step (3).
9. The cleaning process of claim 1, wherein the ultrasonic degreasing, the first washing, the second washing, the acid washing and the third washing are all performed in a normal temperature environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110833608.2A CN113549925A (en) | 2021-07-22 | 2021-07-22 | Brazing aluminum piece cleaning process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110833608.2A CN113549925A (en) | 2021-07-22 | 2021-07-22 | Brazing aluminum piece cleaning process |
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| CN113549925A true CN113549925A (en) | 2021-10-26 |
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| CN202110833608.2A Pending CN113549925A (en) | 2021-07-22 | 2021-07-22 | Brazing aluminum piece cleaning process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114618839A (en) * | 2022-03-18 | 2022-06-14 | 东风汽车股份有限公司 | Cleaning method and cleaning system for aluminum pipe of automobile air conditioner |
| CN114693659A (en) * | 2022-04-07 | 2022-07-01 | 海门市创睿机械有限公司 | Copper pipe surface cleaning effect evaluation method and system based on image processing |
| CN115094492A (en) * | 2022-06-24 | 2022-09-23 | 一汽解放汽车有限公司 | Flange and flange surface treatment method |
| CN115505935A (en) * | 2022-10-27 | 2022-12-23 | 祁阳宏泰铝业有限公司 | Cleaning process before surface treatment of aluminum alloy section |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1042420A (en) * | 1963-11-12 | 1966-09-14 | Pennsalt Chemicals Corp | Aluminium desmutting compositions |
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| CN114618839A (en) * | 2022-03-18 | 2022-06-14 | 东风汽车股份有限公司 | Cleaning method and cleaning system for aluminum pipe of automobile air conditioner |
| CN114693659A (en) * | 2022-04-07 | 2022-07-01 | 海门市创睿机械有限公司 | Copper pipe surface cleaning effect evaluation method and system based on image processing |
| CN114693659B (en) * | 2022-04-07 | 2023-09-12 | 海门市创睿机械有限公司 | Copper pipe surface cleaning effect evaluation method and system based on image processing |
| CN115094492A (en) * | 2022-06-24 | 2022-09-23 | 一汽解放汽车有限公司 | Flange and flange surface treatment method |
| CN115094492B (en) * | 2022-06-24 | 2024-02-23 | 一汽解放汽车有限公司 | Flange and flange surface treatment method |
| CN115505935A (en) * | 2022-10-27 | 2022-12-23 | 祁阳宏泰铝业有限公司 | Cleaning process before surface treatment of aluminum alloy section |
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