CN108531959A - A kind of Al alloy parts high-efficiency environment friendly electrophoresis sandblasting single nickel salt color method - Google Patents
A kind of Al alloy parts high-efficiency environment friendly electrophoresis sandblasting single nickel salt color method Download PDFInfo
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- CN108531959A CN108531959A CN201810352749.0A CN201810352749A CN108531959A CN 108531959 A CN108531959 A CN 108531959A CN 201810352749 A CN201810352749 A CN 201810352749A CN 108531959 A CN108531959 A CN 108531959A
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- current density
- coloring
- sandblasting
- coverage rate
- alloy parts
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/14—Producing integrally coloured layers
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/12—Process control or regulation
Abstract
The present invention provides a kind of Al alloy parts high-efficiency environment friendly electrophoresis sandblasting single nickel salt color methods, workpiece surface colour changing value in electroplating process is creatively utilized in it, and the current density of control plating is carried out according to the electroplating process that the degree of color change is reacted, to accurately control the coloring cell current density value or electrode voltage of important link during anode oxidation coloration, it is accurately controlled in this way, so that the entire production process time shortens, production product qualification rate can reach absolutely, and examination and test of products process can be saved, technique is finally also recycled nickel-containing waste water using RO reverse osmosis technologies very environmentally friendly.
Description
Technical field
The present invention relates to the dye technology fields of Al alloy parts aluminium section bar in other words, and especially a kind of Al alloy parts are high
The environmentally friendly electrophoresis sandblasting single nickel salt color method of effect.
Background technology
Al alloy parts coloring is extremely important to the performance improvement of workpiece, and the anode oxidation coloration of this field is generally all at present
Main includes being controlled for the time segment of corresponding coloring cell current density or electrode voltage, as patent 85100657,
2012102654769 equal disclosed technical solutions.But all there is a control not in time in the scheme, there are certain failures
Rate, and be unfavorable for lasting mass production, and product also needs to progress anodic oxidation and the problem of inefficiency
Color effect detection increases a large amount of cost.
Therefore inventor is made that the present invention, that is, provides a kind of Al alloy parts anode oxidation coloration of great creativeness
Method.
Invention content
Present invention generally provides a kind of Al alloy parts high-efficiency environment friendly electrophoresis sandblasting single nickel salt color method, feature exists
In the method includes following processes：
1) Al alloy parts are pre-processed；
2) it cleans and carries out anode oxidation coloration operation；
3) nickel-containing waste water is recycled using RO reverse osmosis technologies.
In addition, it can also include step 2-2) it cleans and carries out complement plated operation.
Preferably, the pretreatment includes sandblasting and sulfuric acid etch processing, and the sand size that the sandblasting uses is micro- for 400
Rice, wind pressure are 3 atmospheric pressure, and the sulfuric acid percent concentration is 1%, and temperature is 24 DEG C, and the etch time is 0.4 minute.
Preferably, for the pH value for the plating solution that the complement plated operation uses for 5, temperature is 80 degrees Celsius, and the time is 1 hour, institute
It is the solution for including following component to state plating solution：
Nickel sulfate：0.1 gram per liter, sodium hypophosphite：0.2 gram per liter, sodium acetate：0.15 gram per liter, amion acetic acid：30 grams
Every liter.
Preferably, for the pH value for the plating solution that the anode oxidation coloration operation uses for 7.5, temperature is 60 degrees Celsius, described
Colorant is the solution for including following component：
Nickel sulfate：0.1 gram per liter, boric acid：0.35 gram per liter, sodium citrate：0.5 gram per liter, sodium chloride：30 gram per liters.
Preferably, in the anode oxidation coloration operation process, workpiece surface is taken the photograph in real time using high speed camera
It is supplied to master controller to carry out image procossing, the master controller image that sampling obtains as sampling, and every 0.5s
Convert the image that camera shooting sampling obtains to gray level image, and master controller is by the gray level of each pixel and in advance
If threshold value be compared, and by gray scale be more than the threshold value pixel mark 1, by gray scale be less than or equal to the threshold value pixel
Point mark 0；To 1 all summations, summed result is compared with total pixel value of the Al alloy parts to obtain wrapping
Lid rate；The master controller adjusts coloring cell current density according to the coloring coverage rate in real time：It is less than in the presence of color coverage rate
When 5%, coloring cell current density is 1A/dm2；When being more than or equal to 5% in the presence of color coverage rate and being less than 10%, coloring cell current is close
Degree is 3A/dm2；When being more than or equal to 10% in the presence of color coverage rate and being less than 20%, coloring cell current density is 5A/dm2；Work as coloring
When coverage rate is more than or equal to 20% and is less than 60%, coloring cell current density is 6A/dm2；It is more than or equal in the presence of color coverage rate
60% and less than 80% when, coloring cell current density be 5A/dm2；When being more than or equal to 80% in the presence of color coverage rate and being less than 85%,
Coloring cell current density is 2A/dm2；It is more than or equal to 85% in the presence of color coverage rate and stops the camera shooting sampling, and will coloring slot electricity
Constant current density is 0.5A/dm2It is kept for 10 minutes.The method of the present invention, is creatively utilized workpiece surface in electroplating process
Color change value, and the current density of control plating is carried out according to the electroplating process that the degree of color change is reacted, to accurate
Ground controls that important during anode oxidation coloration link --- the current density value in plating is accurately controlled, makes in this way
Entire production process time shortening is obtained, production product qualification rate can reach absolutely, and can save examination and test of products process.
Description of the drawings
The Al alloy parts surfacial pattern of sampling acquisition is carried out when Fig. 1-3 is in coloring process to different coloring degrees.
Specific implementation mode
Below with reference to drawings and examples, the present invention is described in further detail.
Embodiment one.
Present invention generally provides a kind of Al alloy parts high-efficiency environment friendly electrophoresis sandblasting single nickel salt color method, feature exists
In the method includes following processes：
1) Al alloy parts are pre-processed；
2) it cleans and carries out anode oxidation coloration operation；
It 2-2) cleans and carries out complement plated operation.
Wherein preferably, the pretreatment includes that sandblasting and sulfuric acid etch are handled, the sand size that the sandblasting uses for
400 microns, wind pressure is 3 atmospheric pressure, and the sulfuric acid percent concentration is 1%, and temperature is 24 DEG C, and the etch time is 0.4 minute.
Preferably, for the pH value for the plating solution that the complement plated operation uses for 5, temperature is 80 degrees Celsius, and the time is 1 hour, institute
Stating plating solution includes：
0.1 gram per liter nickel sulfate, 0.2 gram per liter sodium hypophosphite, 0.15 gram per liter sodium acetate, 30 gram per liter amino second
Acid.
Preferably, for the pH value for the plating solution that the anode oxidation coloration operation uses for 7.5, temperature is 60 degrees Celsius, described
Plating solution includes：
0.1 gram per liter nickel sulfate, 0.35 gram per liter boric acid, 0.5 gram per liter sodium citrate, 30 gram per liter sodium chloride.It is preferred that
In the anode oxidation coloration operation process, real-time photography sampling is carried out using high speed camera to workpiece surface for ground, and every
The image that sampling obtains is supplied to master controller to carry out image procossing by 0.5s, and the master controller obtains camera shooting sampling
Image be converted into gray level image, and master controller compares the gray level of each pixel with preset threshold value
Compared with this threshold value can carry out camera shooting conversion by being repeatedly electroplated to be obtained after i.e. plating obtains multiple finished products or semi-finished product
Then using average gray level as the threshold value, and it is more than the pixel mark 1 of the threshold value by gray scale, by gray scale for gray level image
Less than or equal to the pixel mark 0 of the threshold value；To 1 all summations, by total pixel of summed result and the Al alloy parts
Value is compared to obtain coloring coverage rate, i.e., the total value of all pixels point covered summed result divided by Al alloy parts
To obtain a percentage；The master controller adjusts coloring cell current density according to the coloring coverage rate in real time：In the presence of
When color coverage rate is less than 5%, coloring cell current density is 1A/dm2；When being more than or equal to 5% in the presence of color coverage rate and being less than 10%,
Coloring cell current density is 3A/dm2；When being more than or equal to 10% in the presence of color coverage rate and being less than 20% (such as Fig. 1), cell current is coloured
Density is 5A/dm2；When being more than or equal to 20% in the presence of color coverage rate and being less than 60%, coloring cell current density is 6A/dm2；In the presence of
When color coverage rate is more than or equal to 60% and is less than 80% (such as Fig. 2), coloring cell current density is 5A/dm2；It is big in the presence of color coverage rate
In equal to 80% and less than 85% when, coloring cell current density be 2A/dm2；It is more than or equal to 85% (such as Fig. 3) in the presence of color coverage rate
Stop the camera shooting sampling, and is that 0.5A/dm2 is kept for 10 minutes by coloring cell current density constant.
Embodiment two.
Present invention generally provides a kind of Al alloy parts high-efficiency environment friendly electrophoresis sandblasting single nickel salt color method, feature exists
In the method includes following processes：
1) Al alloy parts are pre-processed comprising sandblasting and sulfuric acid etch processing, what the sandblasting used
Sand size is 300-500 microns, and wind pressure is 1-3 atmospheric pressure, and the sulfuric acid percent concentration is 1% or so, and temperature is room
Temperature, etch time are that can be adjusted depending on product situation within 1 minute.
2) it cleans and carries out anode oxidation coloration operation；The pH value for the plating solution that the anode oxidation coloration operation uses for
7.5, temperature is 60 degrees Celsius, and the plating solution is the solution for including following component：
Nickel sulfate：0.1 gram per liter, boric acid：0.35 gram per liter, sodium citrate：0.5 gram per liter, sodium chloride：30 gram per liters.
Preferably, in the anode oxidation coloration operation process, workpiece surface is taken the photograph in real time using high speed camera
It is supplied to master controller to carry out image procossing, the master controller image that sampling obtains as sampling, and every 0.5s
Convert the image that camera shooting sampling obtains to gray level image, and master controller is by the gray level of each pixel and in advance
If threshold value be compared, this threshold value can be obtained i.e. plating and obtain multiple finished products or semi-finished product by being repeatedly electroplated
After carry out camera shooting be converted into gray level image, then using average gray level as the threshold value, and by gray scale be more than the threshold value picture
Gray scale is less than or equal to the pixel mark 0 of the threshold value by vegetarian refreshments mark 1；To 1 all summations, summed result and the aluminium are closed
Total pixel value of metal working part is compared to obtain coloring coverage rate, i.e., covers summed result divided by Al alloy parts all
The total value of pixel is to obtain a percentage；The master controller adjusts coloring slot according to the coloring coverage rate in real time
Current density, this adjustment mode be be electroplated start when current density it is smaller, and current density during intermediate major part
It is larger, and restore smaller current density before end, and smaller current density is kept to be electroplated for a period of time to completion.Electricity
The size of current density can refer to the prior art and Binding experiment and be adjusted, such as the current density size that embodiment one provides,
But faster electroplating velocity or better electroplating effect can be obtained by increasing either reduction current density.
Finally, nickel-containing waste water is recycled using RO reverse osmosis technologies.
Embodiment three.
Present invention generally provides a kind of Al alloy parts high-efficiency environment friendly electrophoresis sandblasting single nickel salt color method, feature exists
In the method includes following processes：
1) Al alloy parts are pre-processed comprising sandblasting and sulfuric acid etch processing, what the sandblasting used
Sand size is 300-500 microns, and wind pressure is 1-3 atmospheric pressure, and the sulfuric acid percent concentration is 1% or so, and temperature is room
Temperature, etch time are that can be adjusted depending on product situation within 1 minute.
2) it cleans and carries out anode oxidation coloration operation；The pH value for the plating solution that the anode oxidation coloration operation uses for
7.5, temperature is 60 degrees Celsius, and the plating solution is the solution for including following component：
Nickel sulfate：0.1 gram per liter, boric acid：0.35 gram per liter, sodium citrate：0.5 gram per liter, sodium chloride：30 gram per liters.
Preferably, in the anode oxidation coloration operation process, workpiece surface is taken the photograph in real time using high speed camera
It is supplied to master controller to carry out image procossing, the master controller image that sampling obtains as sampling, and every 0.5s
Convert the image that camera shooting sampling obtains to gray level image, and master controller is by the gray level of each pixel and in advance
If threshold value be compared, this threshold value can be obtained i.e. plating and obtain multiple finished products or semi-finished product by being repeatedly electroplated
After carry out camera shooting be converted into gray level image, then using average gray level as the threshold value, and by gray scale be more than the threshold value picture
Gray scale is less than or equal to the pixel mark 0 of the threshold value by vegetarian refreshments mark 1；To 1 all summations, summed result and the aluminium are closed
Total pixel value of metal working part is compared to obtain coloring coverage rate, i.e., covers summed result divided by Al alloy parts all
The total value of pixel is to obtain a percentage；The master controller adjusts coloring slot according to the coloring coverage rate in real time
Current density, this adjustment mode be be electroplated start when current density it is smaller, and current density during intermediate major part
It is larger, and restore smaller current density before end, and smaller current density is kept to be electroplated for a period of time to completion.Electricity
The size of current density can refer to the prior art and Binding experiment and be adjusted, such as the current density size that embodiment one provides,
But faster electroplating velocity or better electroplating effect can be obtained by increasing either reduction current density.
It 2-2) cleans and carries out complement plated operation.Preferably, for 5, temperature is the pH value for the plating solution that the complement plated operation uses
80 degrees Celsius, the time is 1 hour, and the plating solution is the solution for including following component：
Nickel sulfate：0.1 gram per liter, sodium hypophosphite：0.2 gram per liter, sodium acetate：0.15 gram per liter, amion acetic acid：30 grams
Every liter.
Example IV.
The present embodiment provides another Al alloy parts method for anodizing and coloring, and the method includes following processes：
1) Al alloy parts are pre-processed comprising sandblasting and sulfuric acid etch processing, what the sandblasting used
Sand size is 300-500 microns, and wind pressure is 1-3 atmospheric pressure, and the sulfuric acid percent concentration is 1% or so, and temperature is room
Temperature, etch time are that can be adjusted depending on product situation within 1 minute.
2) it cleans and carries out anode oxidation coloration operation；The pH value for the plating solution that the anode oxidation coloration operation uses for
7.5, temperature is 60 degrees Celsius, and the plating solution is the solution for including following component：
Nickel sulfate：0.1 gram per liter, boric acid：0.35 gram per liter, sodium citrate：0.5 gram per liter, sodium chloride：30 gram per liters.
Wherein preferably, in the anode oxidation coloration operation process, workpiece surface is carried out using high speed camera real
When camera shooting sampling, and be supplied to master controller to carry out image procossing, the center control image that sampling obtains every 0.5s
Device processed converts image that camera shooting sampling obtains to gray level image, and master controller is by the gray level of each pixel
It is compared with preset threshold value, this threshold value can be obtained the i.e. multiple finished products of plating acquisition or half by being repeatedly electroplated
Camera shooting is carried out after finished product and is converted into gray level image, then using average gray level as the threshold value, and is more than the threshold value by gray scale
Pixel mark 1, by gray scale be less than or equal to the threshold value pixel mark 0；To all 1 summations, by summed result with it is described
Total pixel value of Al alloy parts is compared to obtain coloring coverage rate, i.e., covers summed result divided by Al alloy parts
The total value of all pixels point is to obtain a percentage；The master controller adjusts sun in real time according to the coloring coverage rate
Pole tension, this adjustment mode are that when aoxidizing beginning, voltage is relatively low, and voltage is higher during intermediate major part, and is tying
Restore smaller voltage before beam, and smaller electrode voltage is kept extremely to complete plating for a period of time.The size of voltage can join
It examines the prior art and Binding experiment is adjusted, such as the voltage swing that embodiment one provides, but increasing or reduce voltage can be with
Faster electroplating velocity or better electroplating effect are obtained, and ceiling voltage should be controlled and be no more than breakdown voltage.
Claims (4)
1. a kind of Al alloy parts high-efficiency environment friendly electrophoresis sandblasting single nickel salt color method, which is characterized in that the method includes with
Lower process：
1) Al alloy parts are pre-processed；
2) it cleans and carries out anode oxidation coloration operation；
3) nickel-containing waste water is recycled using RO reverse osmosis technologies.
2. Al alloy parts high-efficiency environment friendly electrophoresis sandblasting single nickel salt color method as described in claim 1, which is characterized in that institute
It includes sandblasting and sulfuric acid etch processing to state pretreatment, and for the sand size that the sandblasting uses for 400 microns, wind pressure is 3 atmospheric pressure,
The sulfuric acid percent concentration is 1%, and temperature is 24 DEG C, and the etch time is 0.4 minute.
3. Al alloy parts high-efficiency environment friendly electrophoresis sandblasting single nickel salt color method as claimed in claim 2, which is characterized in that institute
The pH value for the colorant that anode oxidation coloration operation uses is stated as 7.5, temperature is 60 degrees Celsius, the colorant be include following
The solution of ingredient：
Nickel sulfate：0.1 gram per liter, boric acid：0.35 gram per liter, sodium citrate：0.5 gram per liter, sodium chloride：30 gram per liters.
4. Al alloy parts high-efficiency environment friendly electrophoresis sandblasting single nickel salt color method, feature exist as described in one of claim 1-3
In, in the anode oxidation coloration operation process, using high speed camera to workpiece surface progress real-time photography sampling, and every
The image that sampling obtains is supplied to master controller to carry out image procossing by 0.5s, and the master controller obtains camera shooting sampling
Image be converted into gray level image, and master controller compares the gray level of each pixel with preset threshold value
Compared with, and be more than the pixel mark 1 of the threshold value by gray scale, gray scale is less than or equal to the pixel mark 0 of the threshold value；To all
1 summation, summed result is compared with total pixel value of the Al alloy parts to obtain coloring coverage rate；The center control
Device processed adjusts coloring cell current density according to the coloring coverage rate in real time：When being less than 5% in the presence of color coverage rate, cell current is coloured
Density is 1A/dm2；When being more than or equal to 5% in the presence of color coverage rate and being less than 10%, coloring cell current density is 3A/dm2；Work as coloring
When coverage rate is more than or equal to 10% and is less than 20%, coloring cell current density is 5A/dm2；It is more than or equal in the presence of color coverage rate
20% and less than 60% when, coloring cell current density be 6A/dm2；When being more than or equal to 60% in the presence of color coverage rate and being less than 80%,
Coloring cell current density is 5A/dm2；When being more than or equal to 80% in the presence of color coverage rate and being less than 85%, coloring cell current density is
2A/dm2；It is more than or equal to 85% in the presence of color coverage rate and stops the camera shooting sampling, and is 0.5A/ by coloring cell current density constant
dm2It is kept for 10 minutes.
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|---|---|---|---|---|
| CN103695987A (en) * | 2013-12-19 | 2014-04-02 | 广东坚美铝型材厂（集团）有限公司 | Extinction translucent blue electrophoresis aluminium profile and preparation method thereof |
| CN105821461A (en) * | 2016-05-19 | 2016-08-03 | 广东伟业铝厂集团有限公司 | Aluminum alloy copper salt coloring electrophoresis process |
| CN106978618A (en) * | 2017-04-04 | 2017-07-25 | 上饶市鸿基铝业有限公司 | A kind of aluminium alloy high-efficiency environment friendly oxidation technology method |
| CN107794558A (en) * | 2016-08-31 | 2018-03-13 | 昆山汉鼎精密金属有限公司 | Aluminum alloy surface color method and its products formed |
-
2018
- 2018-04-19 CN CN201810352749.0A patent/CN108531959A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695987A (en) * | 2013-12-19 | 2014-04-02 | 广东坚美铝型材厂（集团）有限公司 | Extinction translucent blue electrophoresis aluminium profile and preparation method thereof |
| CN105821461A (en) * | 2016-05-19 | 2016-08-03 | 广东伟业铝厂集团有限公司 | Aluminum alloy copper salt coloring electrophoresis process |
| CN107794558A (en) * | 2016-08-31 | 2018-03-13 | 昆山汉鼎精密金属有限公司 | Aluminum alloy surface color method and its products formed |
| CN106978618A (en) * | 2017-04-04 | 2017-07-25 | 上饶市鸿基铝业有限公司 | A kind of aluminium alloy high-efficiency environment friendly oxidation technology method |
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