CN105154953B - A kind of mobile phone metal battery cover surface treatment method - Google Patents
A kind of mobile phone metal battery cover surface treatment method Download PDFInfo
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- CN105154953B CN105154953B CN201510624600.XA CN201510624600A CN105154953B CN 105154953 B CN105154953 B CN 105154953B CN 201510624600 A CN201510624600 A CN 201510624600A CN 105154953 B CN105154953 B CN 105154953B
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Abstract
The invention provides a kind of mobile phone metal battery cover surface treatment method, methods described is：First, blasting treatment is carried out in mobile phone metal battery cover front, wire drawing process is carried out in mobile phone metal battery cover side, anodized then is done to whole mobile phone metal battery cover, pass through sealing pores again, obtain the mobile phone metal battery cover of positive sandblasting, side wire drawing.This method causes mobile phone battery cover to have the effect of sandblasting, wire drawing and anodic oxidation concurrently, makes effect more rich and varied；Meanwhile, using the mixed solution of sulfuric acid and the mixed solution of carboxyl acetic acid as electrolyte in anode oxidation process, the decay resistance of mobile phone metal battery cover can be improved.
Description
Technical field
The invention belongs to electronics and domain of communication equipment, it is related to a kind of mobile phone metal battery cover surface treatment method, especially
It is related to a kind of sandblasting of mobile phone metal battery cover, wire drawing and anodized surface processing method.
Background technology
In recent years, mobile phone more and more uses metal shell, and its material can be stainless steel and aluminium alloy etc..Battery of mobile phone
Bonnet is in significant position, is typically provided with device identification (LOGO), such as trade mark, model or special figure or character,
So as to user's identification or it is used as advertising purposes.With the variation of Treatment of Metal Surface color and becoming for individualized development
Gesture, the appearance of product can be not only lifted with metal-like, and its unique texture can lift the class of product
And taste.
Prepare using 5 serial (such as 5052) and the aluminium alloy of 6 series (such as 6061 and 6063) materials more than battery of mobile phone bonnet,
The physical property of this aluminum alloy materials in itself determines its excellent for doing anodic oxidation.
At present, the process of surface treatment of conventional aluminium alloy extrusions has：Anodic oxidation, electrophoretic painting, powder spray, spray
Paint, polishing and thermal transfer etc..Patent CN 101845656A disclose a kind of high-gloss aluminum alloy drawing profiles surface treatment work
Skill, including wire drawing, chemical polishing, light extraction, anodic oxidation and sealing of hole step, although the technique can produce surface and have thread line
Manage, be smooth to the touch aluminium section bars fine and smooth and with high-gloss metal true qualities, but its hard decay resistance of section bar for producing and resistance to
Poor performance is waited, is subject to wear and tear in rugged environment and corrodes, it is easily dimmed and skin effect phenomenon occur during Reusability,
If applied to battery of mobile phone bonnet, the lost of life of battery of mobile phone bonnet can be made.
Now, it is first right more than the process of surface treatment of battery of mobile phone bonnet by the way of sandblasting and anodic oxidation are combined
Anodized is done in cell phone rear cover surface again after carrying out blasting treatment, but its appearance is single, lacks originality.
The content of the invention
It is poor for the hard decay resistance of problems of the prior art, i.e. aluminium section bar and weather resistance, in severe ring
It is subject to wear and tear and corrode in border, easily dimmed and skin effect phenomenon occur during Reusability, sandblasting is mutually tied with anodic oxidation
Battery of mobile phone bonnet appearance prepared by the mode of conjunction is single and lacks originality.The invention provides a kind of mobile phone metal
Battery cover surface treatment method, this method passes through in the positive sandblasting of mobile phone metal battery cover, side wire drawing, then to whole mobile phone
Metal battery cover does anodic oxidation after stain so that mobile phone battery cover has the effect of sandblasting, wire drawing and anodic oxidation concurrently, makes effect
It is more rich and varied；Meanwhile, using the mixed solution of sulfuric acid and carboxyl acetic acid as electrolyte in anode oxidation process, Ke Yiti
The decay resistance of high mobile phone metal battery cover.
For up to this purpose, the present invention uses following technical scheme：
A kind of mobile phone metal battery cover surface treatment method, methods described is：
(1) blasting treatment is carried out in mobile phone metal battery cover front；
(2) wire drawing process is carried out in mobile phone metal battery cover side；
(3) anodized is done to whole mobile phone metal battery cover, then by sealing pores, obtains positive sandblasting, side
The mobile phone metal battery cover of face wire drawing.
In the present invention, the whole mobile phone metal battery cover, which is done, can also carry out dyeing processing after anodized.
Wherein, the purpose of dyeing is to make product that different colors are presented.In the present invention, dyeing be can selection operation, to make
Mobile phone metal battery cover keeps aluminium alloy true qualities, is not required to dyeing；If making other colors, such as golden, blueness, pink colour or black
Color etc., then need dyeing.
The purpose of sealing pores is to improve the corrosion-resistant and antifouling property of product, while avoiding the dyestuff after dyeing from overflowing
Go out.
In the present invention, blasting treatment described in step (1) is manual sandblasting and/or machine sandblasting, you can with using by hand
Sandblasting, can use machine sandblasting, can also manual sandblasting and machine sandblasting use cooperatively.
Preferably, the sandblasting used described in step (1) in blasting treatment can be any one in glass sand, steel sand or zircon sand
Kind or at least two combination, the combination is typical but non-limiting examples have：The combination of glass sand and steel sand, steel sand and zircon sand
Combination, the combination of glass sand, steel sand and zircon sand etc..
Preferably, the granularity of the sandblasting used described in step (1) in blasting treatment is 0.065~0.25mm, for example
0.065mm, 0.045mm or 0.25mm etc..
Preferably, blasting pressure is 1.0~2.5kg/cm in blasting treatment described in step (1)2, such as 1.0kg/cm2、
1.3kg/cm2、1.5kg/cm2、1.7kg/cm2、2.0kg/cm2、2.3kg/cm2Or 2.5kg/cm2Deng.
Preferably, it is 8~15 ms/min, such as 8 ms/min, 9 to transmit tape running speed described in step (1) in blasting treatment
M/min, 10 ms/min, 11 ms/min, 12 ms/min, 13 ms/min, 14 ms/min or 15 ms/min etc..
In the present invention, wire drawing process described in step (2) is manual wire drawing and/or machine wire drawing, you can with using by hand
Wire drawing, can use machine wire drawing, can also manual wire drawing and machine wire drawing use cooperatively, wherein machine wire drawing uses wire drawing machine
Carry out wire drawing.
Preferably, wire drawing process described in step (2) selects the pulling wheel of 20~800 mesh, and the model of pulling wheel can be 20
Mesh, 60 mesh, 100 mesh, 200 mesh, 320 mesh, 400 mesh, 500 mesh, 600 mesh, 700 mesh or 800 mesh etc., preferably 320 mesh.
Preferably, described in step (2) in wire drawing process wire drawing walking speed be 2~30 ms/min, such as 2 ms/min, 5 ms/min,
10 ms/min, 15 ms/min, 20 ms/min, 25 ms/min or 30 ms/min etc., preferably 15 ms/min.
Preferably, described in step (2) in wire drawing process wire drawing machine rotating speed be 1800~2400 revs/min, such as 1800 turns/
Point, 1900 revs/min, 2000 revs/min, 2100 revs/min, 2200 revs/min, 2300 revs/min or 2400 revs/min etc..
Preferably, the outlet scope of wire drawing process described in step (2) be 0.1~2.5mm, such as 0.1mm, 0.5mm,
1mm, 1.5mm, 2mm or 2.5mm etc., preferably 0.5mm.
In the present invention, anodized includes successively described in step (3)：Degreasing, alkaline etching, desmut, chemical polishing
And anodic oxidation.
In the present invention, the degreasing is：By pending mobile phone metal battery cover in tertiary sodium phosphate, Nonyl pheno
In the mixed solution of the sour sodium of ether and dodecyl semi-annular jade pendant, soak 3~5min in 50~60 DEG C, wherein solution temperature can for 50 DEG C, 51
DEG C, 52 DEG C, 53 DEG C, 54 DEG C, 55 DEG C, 56 DEG C, 57 DEG C, 58 DEG C, 59 DEG C or 60 DEG C etc.；Soak time can for 3min, 3.5min,
4min, 4.5min or 5min etc..
Preferably, the concentration of the tertiary sodium phosphate is 50~60g/L, such as 50g/L, 52g/L, 54g/L, 55g/L, 56g/
L, 58g/L or 60g/L etc..
Preferably, the concentration of the NPE be 3~10mL/L, such as 3mL/L, 5mL/L, 7mL/L or
10mL/L etc., preferably 5mL/L；Wherein, the concentration of NPE refers to contain nonyl phenol in every liter of mixed solution
3~10mL of APEO.
Preferably, the concentration of the sour sodium of the dodecyl semi-annular jade pendant is 0.5~2g/L, such as 0.5g/L, 1g/L, 1.5g/L or
2g/L etc., preferably 1g/L.
In the present invention, the alkaline etching is：45~65g/L aqueous slkali is prepared, aqueous slkali 50~70 DEG C are warming up to, then
By in pending mobile phone metal battery cover immersion aqueous slkali, 5~30s is kept to take out at said temperatures.
Wherein, the concentration of aqueous slkali can be 45g/L, 50g/L, 55g/L, 60g/L or 65g/L etc., preferably 50~60g/
L, more preferably 55g/L；Aqueous slkali is warming up to 50 DEG C, 55 DEG C, 60 DEG C, 65 DEG C or 70 DEG C etc., preferably 60 DEG C；Keep
Time can be 5s, 10s, 15s, 20s, 25s or 30s etc., preferably 10~20s.
Preferably, the aqueous slkali is sodium hydroxide solution.
In the present invention, the desmut is：Mobile phone metal battery cover is soaked into 10~60s in salpeter solution, for example
10s, 20s, 30s, 40s, 50s or 60s etc., preferably 30~40s.
Preferably, the concentration of the salpeter solution be 200~400mL/L, such as 200mL/L, 250mL/L, 300mL/L,
350mL/L or 400mL/L etc., preferably 300mL/L；Wherein, the concentration of salpeter solution refers to contain nitre in every liter of salpeter solution
200~400mL of acid.
Preferably, the chemical polishing is：Chemistry is carried out to mobile phone metal battery cover with the mixed solution of phosphoric acid and nitric acid
Polish 5~60s, such as 5s, 10s, 15s, 20s, 30s, 40s, 50s or 60s, preferably 30~40s.
Preferably, in the mixed solution of the phosphoric acid and nitric acid phosphoric acid concentration be 90~95wt%, such as 90wt%,
91wt%, 92wt%, 93wt%, 94wt% or 95wt% etc.；The concentration of nitric acid be 5~10wt%, such as 5wt%, 6wt%,
7wt%, 8wt%, 9wt% or 10wt% etc., preferably phosphoric acid are 93wt%, and nitric acid is 7wt%.
In the present invention, the anodic oxidation is：The mixed solution of sulfuric acid and carboxyl acetic acid is added in oxidation pond, is kept molten
Liquid temperature degree is 18~22 DEG C, is powered at oxidation pond the two poles of the earth, wherein 1.0~1.5A/dm of current density2, 8~16V of voltage keeps logical
Electric 30~60min of time.
Wherein, solution temperature can be 18 DEG C, 19 DEG C, 20 DEG C, 21 DEG C or 22 DEG C etc.；Current density can be 1.0A/dm2、
1.1A/dm2、1.2A/dm2、1.3A/dm2、1.4A/dm2Or 1.5A/dm2Deng；Voltage can for 8V, 9V, 10V, 11V, 12V, 13V,
14V, 15V or 16V etc..
Preferably, the concentration of the sulfuric acid added is 150~220g/L, such as 150g/L, 160g/L, 170g/L, 180g/
L, 190g/L, 200g/L, 210g/L or 220g/L etc., preferably 180~190g/L.
Preferably, the concentration of the carboxyl acetic acid added is 6~10g/L, such as 6g/L, 7g/L, 8g/L, 9g/L or 10g/
L etc., preferably 8g/L.
Preferably, after anodized, in the film of mobile phone metal battery cap surface 5~15 μ m-thicks of formation, thickness
It can be 5 μm, 7 μm, 10 μm, 13 μm or 15 μm etc..
In the present invention, the mobile phone metal battery cover surface treatment method is：
(1) blasting treatment is carried out in mobile phone metal battery cover front, the granularity of the sandblasting used in the blasting treatment is
0.065~0.25mm, blasting pressure is 1.0~2.5kg/cm2, transmission tape running speed is 8~15 ms/min；
(2) wire drawing process is carried out in mobile phone metal battery cover side, from the pulling wheel of 20~800 mesh, wire drawing walking speed is 2
~30 ms/min, wire drawing machine rotating speed is 1800~2400 revs/min, and outlet scope is 0.1~2.5mm；
(3) anodized is done to whole mobile phone metal battery cover, then by sealing pores, obtains positive sandblasting, side
The mobile phone metal battery cover of face wire drawing；
The anodized includes successively：Degreasing, alkaline etching, desmut, chemical polishing and anodic oxidation；
Wherein, the degreasing is：By pending mobile phone metal battery cover tertiary sodium phosphate, NPE and
In the mixed solution of dodecyl semi-annular jade pendant acid sodium, 3~5min is soaked in 50~60 DEG C；
The alkaline etching is：45~65g/L aqueous slkali is prepared, aqueous slkali is warming up to 50~70 DEG C, then will be pending
Mobile phone metal battery cover immersion aqueous slkali in, at said temperatures keep 5~30s take out；
The desmut is：Mobile phone metal battery cover is soaked into 10~60s in salpeter solution；
The chemical polishing is：Mobile phone metal battery cover is carried out with the mixed solution of phosphoric acid and nitric acid chemical polishing 5~
60s；
The anodic oxidation is：150~220g/L of addition sulfuric acid and 6~10g/L carboxyl acetic acid in oxidation pond
Mixed solution, it is 18~22 DEG C to keep solution temperature, is powered at oxidation pond the two poles of the earth, wherein 1.0~1.5A/dm of current density2, electricity
8~16V is pressed, 30~60min of time is remained powered on.
Compared with prior art, the invention has the advantages that：
The present invention passes through in the positive sandblasting of mobile phone metal battery cover, side wire drawing, then to whole mobile phone metal battery cover
Do anodic oxidation after stain so that mobile phone battery cover has the effect of sandblasting, wire drawing and anodic oxidation concurrently, make effect more horn of plenty many
Sample；Meanwhile, using the mixed solution of sulfuric acid and the mixed solution of carboxyl acetic acid as electrolyte in anode oxidation process, Ke Yiti
The decay resistance of high mobile phone metal battery cover, by decay resistance measurements determination, its corrosion rate is only 0.3mm/a or so,
Mass loss rate is less than 10%.
Brief description of the drawings
Fig. 1 is the process chart of mobile phone metal battery cover surface treatment method of the present invention.
Embodiment
For the present invention is better described, technical scheme is readily appreciated, below to the present invention further specifically
It is bright.But following embodiments is only the simple example of the present invention, the scope of the present invention is not represented or limits, this
Invention protection domain is defined by claims.
Following embodiment is surface-treated using the technological process shown in Fig. 1 to mobile phone metal battery cover.
The decay resistance of mobile phone metal battery cover is tested using GB 100124-88 in following embodiment.
Embodiment 1：
Pending mobile phone metal battery cover is installed with a special fixture, the side of mobile phone metal battery cover is hidden
Cover and protect.
Sandblasting is carried out to the front of mobile phone metal battery cover, wherein sandblasting uses glass sand, and the granularity of sandblasting is 0.045mm
(i.e. 150# sand), blasting pressure is 2kg/cm2, transmission tape running speed is 10 ms/min.
After the completion of sandblasting, in the positive mask of mobile phone metal battery cover, then the tool for covering side is removed, then is filled
Enter front protecting into another tool, and side is exposed.
Wire drawing process is carried out to mobile phone metal battery cover side, wherein, from the pulling wheel of 60 mesh, wire drawing walking speed is 15
M/min, wire drawing machine rotating speed is 2000 revs/min, and outlet scope is 1mm.
After the completion of wire drawing, the tool that mobile phone metal battery is covered is removed, and is torn pad pasting, is then carried out anodic oxidation to it
Processing, the anodized includes successively：Degreasing, alkaline etching, desmut, chemical polishing and anodic oxidation.
Degreasing：By pending mobile phone metal battery cover in tertiary sodium phosphate containing 55g/L, 5mL/L NPEs
In the mixed solution of the sour sodium of 1g/L dodecyls semi-annular jade pendant, in soaking 4min at 55 DEG C.
Alkaline etching：55g/L sodium hydroxide solution is prepared, sodium hydroxide solution 60 DEG C are warming up to, then by mobile phone metal
In battery cover immersion sodium hydroxide solution, 10s is kept to take out at said temperatures.
Desmut：Mobile phone metal battery cover is soaked into 30s in 300mL/L salpeter solutions.
Chemical polishing：With the mixed solution (wherein, phosphoric acid is 93wt%, and nitric acid is 7wt%) of phosphoric acid and nitric acid to mobile phone
Metal battery cover carries out chemical polishing 30s.
Anodic oxidation is：(wherein, the concentration of sulfuric acid is the mixed solution of addition sulfuric acid and carboxyl acetic acid in oxidation pond
180g/L, the concentration of carboxyl acetic acid is 8g/L) keep solution temperature for 20 DEG C, it is powered at oxidation pond the two poles of the earth, wherein current density
1.2A/dm2, voltage 12V remains powered on time 40min.
Mobile phone metal battery cover after anodized carries out sealing pores, obtains positive sandblasting, the hand of side wire drawing
Machine metal battery cover.
Performance test is carried out to surface treated mobile phone metal battery cover, its corrosion rate R is measured for 0.25mm/a,
Mass loss rate △ M are 8% or so.
Embodiment 2：
Pending mobile phone metal battery cover is installed with a special fixture, the side of mobile phone metal battery cover is hidden
Cover and protect.
Sandblasting is carried out to the front of mobile phone metal battery cover, wherein sandblasting uses glass sand, and the granularity of sandblasting is 0.065mm
(i.e. 200# sand), blasting pressure is 1kg/cm2, transmission tape running speed is 8 ms/min.
After the completion of sandblasting, in the positive mask of mobile phone metal battery cover, then the tool for covering side is removed, then is filled
Enter front protecting into another tool, and side is exposed.
Wire drawing process is carried out to mobile phone metal battery cover side, wherein, from the pulling wheel of 600 mesh, wire drawing walking speed is 2
M/min, wire drawing machine rotating speed is 1800 revs/min, and outlet scope is 0.1mm.
After the completion of wire drawing, the tool that mobile phone metal battery is covered is removed, and is torn pad pasting, is then carried out anodic oxidation to it
Processing, the anodized includes successively：Degreasing, alkaline etching, desmut, chemical polishing and anodic oxidation.
Degreasing：By pending mobile phone metal battery cover in tertiary sodium phosphate containing 50g/L, 3mL/L NPEs
In the mixed solution of the sour sodium of 0.5g/L dodecyls semi-annular jade pendant, in soaking 3min at 50 DEG C.
Alkaline etching：45g/L sodium hydroxide solution is prepared, sodium hydroxide solution 50 DEG C are warming up to, then by mobile phone metal
In battery cover immersion aqua calcis, 5s is kept to take out at said temperatures.
Desmut：Mobile phone metal battery cover is soaked into 40s in 200mL/L salpeter solutions.
Chemical polishing：With the mixed solution (wherein, phosphoric acid is 95wt%, and nitric acid is 5wt%) of phosphoric acid and nitric acid to mobile phone
Metal battery cover carries out chemical polishing 40s.
Anodic oxidation is：(wherein, the concentration of sulfuric acid is the mixed solution of addition sulfuric acid and carboxyl acetic acid in oxidation pond
190g/L, the concentration of carboxyl acetic acid is 6g/L) keep solution temperature for 18 DEG C, it is powered at oxidation pond the two poles of the earth, wherein current density
1.0A/dm2, voltage 8V remains powered on time 60min.
Mobile phone metal battery cover after anodized carries out sealing pores, obtains positive sandblasting, the hand of side wire drawing
Machine metal battery cover.
Performance test is carried out to surface treated mobile phone metal battery cover, its corrosion rate R is measured for 0.3mm/a,
Mass loss rate △ M are 9% or so.
Embodiment 3：
Pending mobile phone metal battery cover is installed with a special fixture, the side of mobile phone metal battery cover is hidden
Cover and protect.
Sandblasting is carried out to the front of mobile phone metal battery cover, wherein sandblasting uses glass sand, and the granularity of sandblasting is 0.25mm
(i.e. 80# sand), blasting pressure is 2.5kg/cm2, transmission tape running speed is 15 ms/min.
After the completion of sandblasting, in the positive mask of mobile phone metal battery cover, then the tool for covering side is removed, then is filled
Enter front protecting into another tool, and side is exposed.
Wire drawing process is carried out to mobile phone metal battery cover side, wherein, from the pulling wheel of a diameter of 800 mesh, wire drawing is walked
Speed is 30 ms/min, and wire drawing machine rotating speed is 2400 revs/min, and outlet scope is 2.5mm.
After the completion of wire drawing, the tool that mobile phone metal battery is covered is removed, and is torn pad pasting, is then carried out anodic oxidation to it
Processing, the anodized includes successively：Degreasing, alkaline etching, desmut, chemical polishing and anodic oxidation.
Degreasing：By pending mobile phone metal battery cover in tertiary sodium phosphate containing 60g/L, 10mL/L NPEs
In the mixed solution of the sour sodium of 2g/L dodecyls semi-annular jade pendant, in soaking 5min at 60 DEG C.
Alkaline etching：65g/L sodium hydroxide solution is prepared, sodium hydroxide solution 70 DEG C are warming up to, then by mobile phone metal
In battery cover immersion sodium hydroxide solution, 20s is kept to take out at said temperatures.
Desmut：Mobile phone metal battery cover is soaked into 60s in 400mL/L salpeter solutions.
Chemical polishing：With the mixed solution (wherein, phosphoric acid is 90wt%, and nitric acid is 10wt%) of phosphoric acid and nitric acid to mobile phone
Metal battery cover carries out chemical polishing 60s.
Anodic oxidation is：(wherein, the concentration of sulfuric acid is the mixed solution of addition sulfuric acid and carboxyl acetic acid in oxidation pond
220g/L, the concentration of carboxyl acetic acid is 10g/L) keep solution temperature for 22 DEG C, it is powered at oxidation pond the two poles of the earth, wherein current density
1.5A/dm2, voltage 16V remains powered on time 30min.
Mobile phone metal battery cover after anodized carries out sealing pores, obtains positive sandblasting, the hand of side wire drawing
Machine metal battery cover.
Performance test is carried out to surface treated mobile phone metal battery cover, its corrosion rate R is measured for 0.3mm/a,
Mass loss rate △ M are 10% or so.
Embodiment 4：
Pending mobile phone metal battery cover is installed with a special fixture, the side of mobile phone metal battery cover is hidden
Cover and protect.
Sandblasting is carried out to the front of mobile phone metal battery cover, wherein sandblasting uses glass sand, and the granularity of sandblasting is 0.045mm
(i.e. 150# sand), blasting pressure is 2.5kg/cm2, transmission tape running speed is 8 ms/min.
After the completion of sandblasting, in the positive mask of mobile phone metal battery cover, then the tool for covering side is removed, then is filled
Enter front protecting into another tool, and side is exposed.
Wire drawing process is carried out to mobile phone metal battery cover side, wherein, from the pulling wheel of 320 mesh, wire drawing walking speed is 30
M/min, wire drawing machine rotating speed is 2400 revs/min, and outlet scope is 0.5mm.
After the completion of wire drawing, the tool that mobile phone metal battery is covered is removed, and is torn pad pasting, is then carried out anodic oxidation to it
Processing, the anodized includes successively：Degreasing, alkaline etching, desmut, chemical polishing and anodic oxidation.
Degreasing：By pending mobile phone metal battery cover in tertiary sodium phosphate containing 50g/L, 10mL/L NPEs
In the mixed solution of the sour sodium of 2g/L dodecyls semi-annular jade pendant, in soaking 5min at 50 DEG C.
Alkaline etching：45g/L sodium hydroxide solution is prepared, sodium hydroxide solution 70 DEG C are warming up to, then by mobile phone metal
In battery cover immersion sodium hydroxide solution, 30s is kept to take out at said temperatures.
Desmut：Mobile phone metal battery cover is soaked into 10s in 400mL/L salpeter solutions.
Chemical polishing：With the mixed solution (wherein, phosphoric acid is 95wt%, and nitric acid is 5wt%) of phosphoric acid and nitric acid to mobile phone
Metal battery cover carries out chemical polishing 5s.
Anodic oxidation is：(wherein, the concentration of sulfuric acid is the mixed solution of addition sulfuric acid and carboxyl acetic acid in oxidation pond
180g/L, the concentration of carboxyl acetic acid is 10g/L) keep solution temperature for 18 DEG C, it is powered at oxidation pond the two poles of the earth, wherein current density
1.5A/dm2, voltage 8V remains powered on time 30min.
Mobile phone metal battery cover after anodized carries out sealing pores, obtains positive sandblasting, the hand of side wire drawing
Machine metal battery cover.
Performance test is carried out to surface treated mobile phone metal battery cover, its corrosion rate R is measured for 0.27mm/a,
Mass loss rate △ M are 10% or so.
Comparative example 1：
In addition to electrolyte is the sulfuric acid solution of isoconcentration and equivalent in anode oxidation process, other material consumptions and other
Step is in the same manner as in Example 1.
Performance test is carried out to surface treated mobile phone metal battery cover, its corrosion rate R is measured for 1.0mm/a,
Mass loss rate △ M are 50% or so.
Comparative example 2：
In addition to the concentration of carboxyl acetic acid in anode oxidation process electrolyte is 1g/L, other material consumptions and other steps
It is in the same manner as in Example 1.
Performance test is carried out to surface treated mobile phone metal battery cover, its corrosion rate R is measured for 0.9mm/a,
Mass loss rate △ M are 45% or so.
Comparative example 3：
In addition to the concentration of carboxyl acetic acid in anode oxidation process electrolyte is 20g/L, other material consumptions and other steps
It is rapid in the same manner as in Example 1.
Performance test is carried out to surface treated mobile phone metal battery cover, its corrosion rate R is measured for 0.8mm/a,
Mass loss rate △ M are 40% or so.
Integrated embodiment 1-4 and comparative example 1-3 result can be seen that the present invention and passes through in mobile phone metal battery cover front
Then sandblasting, side wire drawing does anodic oxidation after stain to whole mobile phone metal battery cover so that mobile phone battery cover has spray concurrently
Sand, wire drawing and the effect of anodic oxidation, make effect more rich and varied；Meanwhile, with sulfuric acid and carboxyl in anode oxidation process
The mixed solution of the mixed solution of acetic acid can improve the decay resistance of mobile phone metal battery cover, by resistance to as electrolyte
Its corrosion rate of corrosive nature measurements determination is only 0.3mm/a or so, and mass loss rate is less than 10%.
Applicant states that the present invention illustrates detailed process equipment and the technological process of the present invention by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, do not mean that the present invention has to rely on above-mentioned detailed
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (39)
1. a kind of mobile phone metal battery cover surface treatment method, it is characterised in that methods described is：
(1) blasting treatment is carried out in mobile phone metal battery cover front；
(2) wire drawing process is carried out in mobile phone metal battery cover side；
(3) anodized is carried out to whole mobile phone metal battery cover, then by sealing pores, obtains positive sandblasting, side
The mobile phone metal battery cover of wire drawing；
Anodized includes successively described in step (3)：Degreasing, alkaline etching, desmut, chemical polishing and anodic oxidation；
The anodic oxidation is：The mixed solution of sulfuric acid and carboxyl acetic acid is added in oxidation pond, keep solution temperature be 18~
22 DEG C, it is powered at oxidation pond the two poles of the earth, wherein 1.0~1.5A/dm of current density2, 8~16V of voltage, remain powered on the time 30~
60min；The concentration of the sulfuric acid added is 150~220g/L；The concentration of the carboxyl acetic acid added is 6~10g/L.
2. surface treatment method according to claim 1, it is characterised in that the whole mobile phone metal battery cover carries out sun
Dyeing processing can be also carried out after the oxidation processes of pole.
3. surface treatment method according to claim 1, it is characterised in that blasting treatment described in step (1) is by hand
Sandblasting and/or machine sandblasting.
4. surface treatment method according to claim 1, it is characterised in that used described in step (1) in blasting treatment
Sandblasting can be glass sand, steel sand or zircon sand in any one or at least two combination.
5. surface treatment method according to claim 1, it is characterised in that used described in step (1) in blasting treatment
Sandblasting granularity be 0.065~0.25mm.
6. surface treatment method according to claim 1, it is characterised in that sandblasting in blasting treatment described in step (1)
Pressure is 1.0~2.5kg/cm2。
7. surface treatment method according to claim 1, it is characterised in that transmitted described in step (1) in blasting treatment
Tape running speed is 8~15 ms/min.
8. surface treatment method according to claim 1, it is characterised in that wire drawing process described in step (2) is by hand
Wire drawing and/or machine wire drawing.
9. surface treatment method according to claim 1, it is characterised in that wire drawing process selects 20 described in step (2)
The pulling wheel of~800 mesh.
10. surface treatment method according to claim 9, it is characterised in that wire drawing process described in step (2) is selected
The pulling wheel of 320 mesh.
11. surface treatment method according to claim 1, it is characterised in that wire drawing in wire drawing process described in step (2)
Walking speed is 2~30 ms/min.
12. surface treatment method according to claim 11, it is characterised in that drawn described in step (2) in wire drawing process
Silk walking speed is 15 ms/min.
13. surface treatment method according to claim 1, it is characterised in that wire drawing in wire drawing process described in step (2)
Machine rotating speed is 1800~2400 revs/min.
14. surface treatment method according to claim 1, it is characterised in that the outlet of wire drawing process described in step (2)
Scope is 0.1~2.5mm.
15. surface treatment method according to claim 14, it is characterised in that wire drawing process goes out described in step (2)
Line scope is 0.5mm.
16. surface treatment method according to claim 1, it is characterised in that the degreasing is：By pending mobile phone gold
Belong to battery cover in the mixed solution of tertiary sodium phosphate, NPE and dodecyl sodium sulfate, in 50~60 DEG C of leachings
Steep 3~5min.
17. surface treatment method according to claim 16, it is characterised in that the concentration of the tertiary sodium phosphate is 50~
60g/L。
18. surface treatment method according to claim 16, it is characterised in that the concentration of the NPE
For 3~10ml/L.
19. surface treatment method according to claim 18, it is characterised in that the concentration of the NPE
For 5ml/L.
20. surface treatment method according to claim 16, it is characterised in that the concentration of the dodecyl sodium sulfate is
0.5~2g/L.
21. surface treatment method according to claim 20, it is characterised in that the concentration of the dodecyl sodium sulfate is
1g/L。
22. surface treatment method according to claim 1, it is characterised in that the alkaline etching is：Prepare 45~65g/L's
Aqueous slkali, 50~70 DEG C are warming up to by aqueous slkali, are then immersed pending mobile phone metal battery cover in aqueous slkali, described
At a temperature of keep 5~30s take out.
23. surface treatment method according to claim 22, it is characterised in that the aqueous slkali is sodium hydroxide solution.
24. surface treatment method according to claim 22, it is characterised in that the concentration of the aqueous slkali is 50~60g/
L。
25. surface treatment method according to claim 24, it is characterised in that the concentration of the aqueous slkali is 55g/L.
26. surface treatment method according to claim 22, it is characterised in that aqueous slkali is warming up to 60 DEG C.
27. surface treatment method according to claim 22, it is characterised in that soak pending mobile phone metal battery cover
Enter in aqueous slkali, keep 10~20s to take out at said temperatures.
28. surface treatment method according to claim 1, it is characterised in that the desmut is：By mobile phone metal battery
Cover 10~60s of immersion in salpeter solution.
29. surface treatment method according to claim 28, it is characterised in that the desmut is：By mobile phone metal electricity
Chi Gai soaks 30~40s in salpeter solution.
30. surface treatment method according to claim 28, it is characterised in that the concentration of the salpeter solution is 200~
400mL/L。
31. surface treatment method according to claim 30, it is characterised in that the concentration of the salpeter solution is 300mL/
L。
32. surface treatment method according to claim 1, it is characterised in that the chemical polishing is：With phosphoric acid and nitric acid
Mixed solution chemical polishing 5~60s is carried out to mobile phone metal battery cover.
33. surface treatment method according to claim 32, it is characterised in that in the mixed solution of the phosphoric acid and nitric acid
The concentration of phosphoric acid is 90~95wt%, and the concentration of nitric acid is 5~10wt%.
34. surface treatment method according to claim 33, it is characterised in that in the mixed solution of the phosphoric acid and nitric acid
The concentration of phosphoric acid is 93wt%, and the concentration of nitric acid is 7wt%.
35. surface treatment method according to claim 1, it is characterised in that the time of the chemical polishing is 30~
40s。
36. surface treatment method according to claim 1, it is characterised in that the sulfuric acid added in the anodic oxidation
Concentration be 180~190g/L.
37. surface treatment method according to claim 1, it is characterised in that the carboxyl added in the anodic oxidation
The concentration of acetic acid is 8g/L.
38. surface treatment method according to claim 1, it is characterised in that after anodized, in mobile phone gold
Belong to the film of battery cap surface 5~15 μ m-thicks of formation.
39. the surface treatment method according to claim any one of 1-38, it is characterised in that methods described is：
(1) blasting treatment is carried out in mobile phone metal battery cover front, the granularity of the sandblasting used in the blasting treatment is 0.065
~0.25mm, blasting pressure is 1.0~2.5kg/cm2, transmission tape running speed is 8~15 ms/min；
(2) wire drawing process is carried out in mobile phone metal battery cover side, from the pulling wheel of a diameter of 20~800 mesh, wire drawing walking speed
For 2~30 ms/min, wire drawing machine rotating speed is 1800~2400 revs/min, and outlet scope is 0.1~2.5mm；
(3) anodized is done to whole mobile phone metal battery cover, then by sealing pores, obtains positive sandblasting, side and draw
The mobile phone metal battery cover of silk；
The anodized includes successively：Degreasing, alkaline etching, desmut, chemical polishing and anodic oxidation；
Wherein, the degreasing is：By pending mobile phone metal battery cover in tertiary sodium phosphate, NPE and 12
In the mixed solution of sodium alkyl sulfonate, 3~5min is soaked in 50~60 DEG C；
The alkaline etching is：45~65g/L aqueous slkali is prepared, aqueous slkali 50~70 DEG C are warming up to, then by pending hand
In machine metal battery cover immersion aqueous slkali, 5~30s is kept to take out at said temperatures；
The desmut is：Mobile phone metal battery cover is soaked into 10~60s in salpeter solution；
The chemical polishing is：5~60s of chemical polishing is carried out to mobile phone metal battery cover with the mixed solution of phosphoric acid and nitric acid；
The anodic oxidation is：The mixing of 150~220g/L sulfuric acid and 6~10g/L carboxyl acetic acid is added in oxidation pond
Solution, it is 18~22 DEG C to keep solution temperature, is powered at oxidation pond the two poles of the earth, wherein 1.0~1.5A/dm of current density2, voltage 8
~16V, remains powered on 30~60min of time.
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| CN105364637B (en) * | 2015-09-29 | 2018-03-16 | 广东欧珀移动通信有限公司 | A kind of surface treatment method of Al-alloy casing |
| CN105543933B (en) * | 2015-12-17 | 2017-09-29 | 广东欧珀移动通信有限公司 | A kind of 3D effect process of surface treatment |
| CN107338462B (en) * | 2016-04-29 | 2019-11-15 | 北京小米移动软件有限公司 | Make method, metal shell and the terminal device of metal shell |
| CN107326417A (en) * | 2016-04-29 | 2017-11-07 | 北京小米移动软件有限公司 | Make method, metal shell and the terminal device of metal shell |
| CN107740164A (en) * | 2017-09-29 | 2018-02-27 | 广东欧珀移动通信有限公司 | Method for producing shell, housing and electronic equipment |
| CN107858732A (en) * | 2017-10-11 | 2018-03-30 | 广东欧珀移动通信有限公司 | Handle method, housing and the mobile terminal of sheet metal |
| CN111434808A (en) * | 2019-01-15 | 2020-07-21 | 广东长盈精密技术有限公司 | Surface treatment method of mobile phone rear shell and mobile phone rear shell |
| CN113977464B (en) * | 2021-10-25 | 2023-03-24 | 佛山市澎拜铝业有限公司 | Automatic double-process system and process for aluminum alloy surface treatment |
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| CN102889468A (en) * | 2012-09-05 | 2013-01-23 | 惠州智科实业有限公司 | Section bar and method for obtaining product with clear color boundary by performing surface treatment on section bar |
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