CN105780028A - Method for removing flow marks and dark spots on surface of aluminum plate - Google Patents
Method for removing flow marks and dark spots on surface of aluminum plate Download PDFInfo
- Publication number
- CN105780028A CN105780028A CN201610021649.0A CN201610021649A CN105780028A CN 105780028 A CN105780028 A CN 105780028A CN 201610021649 A CN201610021649 A CN 201610021649A CN 105780028 A CN105780028 A CN 105780028A
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- China
- Prior art keywords
- deionized water
- solution
- cleaning
- sample
- 1min
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Classifications
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- 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
- C23G1/22—Light metals
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/32—Alkaline compositions
- C23F1/36—Alkaline compositions for etching aluminium or alloys thereof
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/02—Light metals
- C23F3/03—Light metals with acidic solutions
Abstract
The invention belongs to the field of surface treatment of aluminum alloy and particularly relates to a method for removing flow marks and dark spots on the surface of an aluminum plate. At present, for the aluminum plate with the serious flow marks and dark spots, an effective treatment method is lacked. According to the surface treatment method provided by the invention, the material characteristic of the surface of the aluminum plate can be effectively improved through experiments.
Description
Technical field
The invention belongs to the field of surface treatment of aluminium alloy, be specifically related to a kind of method removing surface of aluminum plate current mark and skin dark stain.
Background technology
Owing to current 23# goes into operation in the scarce material of raw material aluminium sheet (ASNA3482,0.8mm) supply of tail boom, pedal, gravity fuel filler, it is impossible to carry out manufactured parts.The basic reason of vestige and skin dark stain is produced from raw material surface of aluminum plate, because aluminium alloy from genuine come our unit after OOBA just occurred in that vestige and polarisation half-light phenomenon, by lookup data determine this phenomenon be due to external environment impact produce the weak corrosion phenomenon of one.When production task is urgent in order to save cost, under the premise not affecting aluminium sheet performance, search a kind of suitable process and remove this kind of defect.
Summary of the invention
(material standard is ASNA3482 to select the 2024T3 with sharp trace and skin dark stain, 0.8mm is thick) aluminium sheet, from the aluminium sheet of 4m*2m, find out the most obvious position of defect, be cut into the sample that 3 block sizes are 40mm*30mm, it is verified test, it is determined that the feasibility of process program.By test of many times, obtain a kind of method removing surface of aluminum plate current mark and skin dark stain, comprise the following steps:
Step one, sample pretreatment
Dip in toluene wiping specimen surface, to remove the glue of remained on surface；
Use trichloroethylene steam oil removing, use pH be the trichloroethylene steam of 6-11 at 87 DEG C of 91 DEG C of temperature, oil removing at twice, whole sample is placed on vapours district 1min, then it is put in cold-zone 1min, then is placed on vapours district and carries out 1min, check that part must not have solvent hold-up.
Step 2, sample dress is hung
Hang sample with aluminium wire dress, and be positioned in the basket of aluminum, spaced apart and ensure not to be detained solution between sample.
Step 3, electrochemical deoiling
Preparation electrochemical deoiling solution, wherein:
Wherein said deionized water need to meet:
In the temperature range of 55 DEG C～65 DEG C, stirring electrochemical deoiling solution, within it soak sample 1min～5min simultaneously, at least 2min is cleaned to remove the electrochemical deoiling agent that specimen surface remains afterwards in the cleaning water lower than 38 DEG C, observe at least 30s, whether specimen surface moisture film is continuous, if water break, should oil removing again.
Step 4, go out light
Make light solution, wherein:
Nitric acid 300-500g/L
The same step 3 of deionized water
At room temperature, by test specimen in going out immersion 2-5min in light solution, light solution is gone out afterwards to what be used for that the deionized water that cleans is stirred cleaning surface of test piece residual, period, this was used for the TDS≤1000ppm of the deionized water cleaned to the deionized water employing oil-free for cleaning, the compression air stirring without solid particle.
Step 5, caustic corrosion
Preparation caustic corrosion solution, wherein:
Sodium hydroxide 20-35g/L
Sodium carbonate 20-30g/L
The same step 3 of deionized water
At the temperature of 40 DEG C～55 DEG C, test specimen is soaked in caustic corrosion solution 2-3min, stir tank liquor simultaneously, the deionized water being used for cleaning is stirred cleaning the caustic corrosion solution of surface of test piece residual afterwards, period is to the deionized water employing oil-free for cleaning, the compression air stirring without solid particle, after cleaning, detection is for the deionized water cleaned, and need to meet TDS≤1000ppm.
Step 6, go out light
Same step 4.
Step 7, dry
Use compression air to dry up specimen surface in one direction to prevent slight current mark from requiring.
According to multiple comparison test result it can be seen that use existing testing program, the vestige of specimen surface and skin dark stain are all removed totally.Only it is thinned 5-10um by thickness measuring sample thickness, and by metallography microscope sem observation, basic change does not occur the fibrous tissue of specimen surface.Thus the performance of specimen surface does not receive impact.Effectively demonstrating the application of testing program, have certain replicability, the application for other type is laid a solid foundation.
Detailed description of the invention
The removal surface of aluminum plate current mark of the present invention and the method for skin dark stain, comprise the following steps:
Step one, sample pretreatment
Dip in toluene wiping specimen surface, to remove the glue of remained on surface；
Use trichloroethylene steam oil removing, use pH be the trichloroethylene steam of 6-11 at 87 DEG C of 91 DEG C of temperature, oil removing at twice, whole sample is placed on vapours district 1min, then it is put in cold-zone 1min, then is placed on vapours district and carries out 1min, check that part must not have solvent hold-up.
Step 2, sample dress is hung
Hang sample with aluminium wire dress, and be positioned in the basket of aluminum, spaced apart between sample, it is ensured that not to be detained solution.
Step 3, electrochemical deoiling
Preparation electrochemical deoiling solution, wherein:
Wherein said deionized water need to meet:
In the temperature range of 55 DEG C～65 DEG C, stirring electrochemical deoiling solution, within it soak sample 1min～5min simultaneously, at least 2min is cleaned to remove the electrochemical deoiling agent that specimen surface remains afterwards in the cleaning water lower than 38 DEG C, observe at least 30s, whether specimen surface moisture film is continuous, if water break, should oil removing again.
Step 4, go out light
Make light solution, wherein:
Nitric acid 300-500g/L
The same step 3 of deionized water
At room temperature, by test specimen in going out immersion 2-5min in light solution, light solution is gone out afterwards to what be used for that the deionized water that cleans is stirred cleaning surface of test piece residual, period, this was used for the TDS≤1000ppm of the deionized water cleaned to the deionized water employing oil-free for cleaning, the compression air stirring without solid particle.
Step 5, caustic corrosion
Preparation caustic corrosion solution, wherein:
Sodium hydroxide 20-35g/L
Sodium carbonate 20-30g/L
The same step 3 of deionized water
At the temperature of 40 DEG C～55 DEG C, test specimen is soaked in caustic corrosion solution 2-3min, stir tank liquor simultaneously, the deionized water being used for cleaning is stirred cleaning the caustic corrosion solution of surface of test piece residual afterwards, period is to the deionized water employing oil-free for cleaning, the compression air stirring without solid particle, detect this deionized water for cleaning after cleaning, TDS≤1000ppm need to be met.
Step 6, go out light
Same step 4.
Step 7, dry
Use compression air to dry up specimen surface in one direction to prevent slight current mark from requiring.
Claims (1)
1. the method removing surface of aluminum plate current mark and skin dark stain, it is characterised in that comprise the following steps:
Step one, sample pretreatment
Dip in toluene wiping specimen surface, to remove the glue of remained on surface；
Use trichloroethylene steam oil removing, use pH be the trichloroethylene steam of 6-11 at 87 DEG C of 91 DEG C of temperature, oil removing at twice, whole sample is placed on vapours district 1min, then it is put in cold-zone 1min, then is placed on vapours district and carries out 1min, check that part must not have solvent hold-up；
Step 2, sample dress is hung
Hang sample with aluminium wire dress, and be positioned in the basket of aluminum, spaced apart and ensure not to be detained solution between sample；
Step 3, electrochemical deoiling
Preparation electrochemical deoiling solution, wherein:
Wherein said deionized water need to meet:
In the temperature range of 55 DEG C～65 DEG C, stirring electrochemical deoiling solution, within it soak sample 1min～5min simultaneously, at least 2min is cleaned to remove the electrochemical deoiling agent that specimen surface remains afterwards in the cleaning water lower than 38 DEG C, observe at least 30s, whether specimen surface moisture film is continuous, if water break, should oil removing again；
Step 4, go out light
Make light solution, wherein:
Nitric acid 300-500g/L
The same step 3 of deionized water
At room temperature, by test specimen in going out immersion 2-5min in light solution, light solution is gone out afterwards to what be used for that the deionized water that cleans is stirred cleaning surface of test piece residual, period, this was used for the TDS≤1000ppm of the deionized water cleaned to the deionized water employing oil-free for cleaning, the compression air stirring without solid particle；
Step 5, caustic corrosion
Preparation caustic corrosion solution, wherein:
Sodium hydroxide 20-35g/L
Sodium carbonate 20-30g/L
The same step 3 of deionized water
At the temperature of 40 DEG C～55 DEG C, test specimen is soaked in caustic corrosion solution 2-3min, stir tank liquor simultaneously, the deionized water being used for cleaning is stirred cleaning the caustic corrosion solution of surface of test piece residual afterwards, period is to the deionized water employing oil-free for cleaning, the compression air stirring without solid particle, after cleaning, detection is for the deionized water cleaned, and need to meet TDS≤1000ppm；
Step 6, go out light
Same step 4；
Step 7, dry
Use compression air to dry up specimen surface in one direction to prevent slight current mark from requiring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610021649.0A CN105780028A (en) | 2016-01-13 | 2016-01-13 | Method for removing flow marks and dark spots on surface of aluminum plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610021649.0A CN105780028A (en) | 2016-01-13 | 2016-01-13 | Method for removing flow marks and dark spots on surface of aluminum plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105780028A true CN105780028A (en) | 2016-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610021649.0A Pending CN105780028A (en) | 2016-01-13 | 2016-01-13 | Method for removing flow marks and dark spots on surface of aluminum plate |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212550A (en) * | 2013-04-24 | 2013-07-24 | 哈尔滨飞机工业集团有限责任公司 | Aluminum alloy airplane skin cleaning method before spot welding |
| CN103233234A (en) * | 2013-04-24 | 2013-08-07 | 哈尔滨飞机工业集团有限责任公司 | Partial copper plating method for part |
| US20130299353A1 (en) * | 2012-05-12 | 2013-11-14 | Catcher Technology Co., Ltd. | Method of forming interference film on surface of aluminum alloy substrate |
| CN103498180A (en) * | 2013-08-23 | 2014-01-08 | 北京星航机电装备有限公司 | Environment-friendly anodic oxidation pretreatment process |
| CN103806008A (en) * | 2013-12-02 | 2014-05-21 | 青岛蓝图文化传播有限公司市南分公司 | Cleaning process/method for aluminum alloy material |
| CN104818473A (en) * | 2015-05-07 | 2015-08-05 | 哈尔滨飞机工业集团有限责任公司 | Method of chemical conversion of 7010 aluminum alloy |
-
2016
- 2016-01-13 CN CN201610021649.0A patent/CN105780028A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130299353A1 (en) * | 2012-05-12 | 2013-11-14 | Catcher Technology Co., Ltd. | Method of forming interference film on surface of aluminum alloy substrate |
| CN103212550A (en) * | 2013-04-24 | 2013-07-24 | 哈尔滨飞机工业集团有限责任公司 | Aluminum alloy airplane skin cleaning method before spot welding |
| CN103233234A (en) * | 2013-04-24 | 2013-08-07 | 哈尔滨飞机工业集团有限责任公司 | Partial copper plating method for part |
| CN103498180A (en) * | 2013-08-23 | 2014-01-08 | 北京星航机电装备有限公司 | Environment-friendly anodic oxidation pretreatment process |
| CN103806008A (en) * | 2013-12-02 | 2014-05-21 | 青岛蓝图文化传播有限公司市南分公司 | Cleaning process/method for aluminum alloy material |
| CN104818473A (en) * | 2015-05-07 | 2015-08-05 | 哈尔滨飞机工业集团有限责任公司 | Method of chemical conversion of 7010 aluminum alloy |
Non-Patent Citations (3)
| Title |
|---|
| 李艳梅: "铝合金型材淬火后表面黑化问题的研究", 《中国西部科技》 * |
| 民航无损检测人员资格鉴定与认证委员会: "《航空器渗透检测 （第2版）》", 31 March 2014, 中国民航出版社 * |
| 胡国辉: "《金属磷化工艺技术》", 31 January 2009, 国防工业出版社 * |
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Application publication date: 20160720 |
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