CN1281796C - Magnesium alloy surface activating process - Google Patents
Magnesium alloy surface activating process Download PDFInfo
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- CN1281796C CN1281796C CN 200410026163 CN200410026163A CN1281796C CN 1281796 C CN1281796 C CN 1281796C CN 200410026163 CN200410026163 CN 200410026163 CN 200410026163 A CN200410026163 A CN 200410026163A CN 1281796 C CN1281796 C CN 1281796C
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- Prior art keywords
- magnesium alloy
- activating process
- chosen
- alloy surface
- handled
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- Expired - Lifetime
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 52
- 230000003213 activating effect Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 17
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000005516 engineering process Methods 0.000 claims abstract description 12
- 238000005238 degreasing Methods 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims abstract description 8
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000007747 plating Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910001868 water Inorganic materials 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 230000004913 activation Effects 0.000 claims description 20
- 239000000126 substance Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 239000013543 active substance Substances 0.000 claims description 5
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical class NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000008151 electrolyte solution Substances 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 238000005868 electrolysis reaction Methods 0.000 claims description 3
- 150000002680 magnesium Chemical class 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 150000003016 phosphoric acids Chemical class 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 6
- 238000004381 surface treatment Methods 0.000 abstract description 3
- 239000003973 paint Substances 0.000 abstract description 2
- 238000007788 roughening Methods 0.000 abstract 3
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 abstract 1
- 239000008262 pumice Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 10
- 239000011734 sodium Substances 0.000 description 8
- 229910052708 sodium Inorganic materials 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000004512 die casting Methods 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 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 description 4
- 230000002950 deficient Effects 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000001311 chemical methods and process Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001962 electrophoresis Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Landscapes
- Chemical Treatment Of Metals (AREA)
- Electroplating Methods And Accessories (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The present invention relates to surface treatment technology, particularly to magnesium alloy surface activating technology. The present invention is characterized in that mechanical roughening is adopted to achieve a uniform micro-roughening surface, and the surface of a magnesium alloy is refined; then, oil stains on the surface of a workpiece are removed by adopting electrolytic degreasing, and the surface of the magnesium alloy is activated by activate liquid. The present invention effectively controls the rate of surface abrasion to achieve a uniform micro-treated surface so as to ensure good bonding force of a magnesium alloy basal body and plating layers, etc. The mechanical roughening means grinding the surface of the magnesium alloy by adopting a wet-type rolling machine, and the grinding liquid contains 40 to 60% of pumice, 20 to 30% of magnesium oxide and 20 to 30% of silicon oxide; a ratio of water to solids is equal to 1: (1 to 5) (a volume ratio), and the pH value of the grinding liquid is selected from 6 to 9. The magnesium alloy surface activating technology can improve the bonding force of the magnesium alloy basal body and plating layers or paint layers during the electric plating or coating of the magnesium alloy without generating over-corrosion to workpieces.
Description
Technical field
The present invention relates to a kind of process of surface treatment, particularly about a kind of magnesium alloy surface activation technology.Background technology
Magnesium alloy is the lightest structural metallic material, and density is 1.8g/cm
3, electromagnetic wave shielding that tool is good and recovery property etc.Magnesium alloy is at electronic product in recent years, automobile component, and the application of gently carrying fields such as formula instrument more and more widely has development potentiality.But magnesium alloy is more active, is easy in process of production and airborne oxygen and the rapid oxidation of aqueous vapor, forms oxide film, causes the poor adhesive force of electrolytic coating and magnesium alloy substrate.For the preservative property of improving magnesium alloy and diversified appearance effect is provided, magnesium products must cooperate suitable surface treatment to use.Traditional activating process mainly is to utilize chemical process, removes oxide on surface and alligatoring metallic surface, to strengthen tack.But because magnesium alloy is active high, make chemical reaction be difficult to control, even the surface occur being influenced the smooth finish and the corrosion resistance nature of product by excessive erosion.
Summary of the invention
The object of the present invention is to provide a kind of magnesium alloy surface activation technology, it can improve magnesium alloy and electroplate or during application in the bonding force of magnesium alloy substrate and coating or coat of painting, can not produce excessive erosion to workpiece.
Design of the present invention is: design a kind of magnesium alloy surface activation technology, it is characterized in that: it adopts mechanical alligatoring earlier, reaches to uniform little coarse surface, finishing Mg alloy surface; Remove the greasy dirt of workpiece surface, use chemical activation liquid activated magnesium alloy surface again with electrolytic degreasing again, the rate of wear of control surface reaches to uniform little treat surface effectively, and is good to guarantee bonding forces such as magnesium alloy substrate and coating.
Described mechanical alligatoring is to adopt the wet type rolling machine to grind Mg alloy surface.
It is that processed is placed in the sealed rolling shredder cylinder that described wet type rolling machine grinds, and rollers roll speed is chosen in 20-500 rev/min, and cylinder is immersed in the lapping liquid fully, and milling time is chosen in 20-90 minute; Temperature is chosen in 10-35 ℃.
Described lapping liquid, contain float stone 40-60%, magnesium oxide 20-30%, silicon oxide 20-30%, water: solid=1: 1～5 (volume ratio), lapping liquid pH value is chosen in 6-9.
Described electrolytic degreasing, voltage are chosen in the 4-8 volt, and electrolysis time is chosen in 1-3 minute, and temperature is controlled at 40-50 ℃, and the pH value is controlled at 7-10.
Described electrolytic solution comprises phosphoric acid salt 20-250g/l; Silicate 15-150g/l; Tensio-active agent 0.5-7.5%.
Described surface active soaked workpiece 1-3 minute in surface activity liquid, temperature is a normal temperature, PH=1.0-5.0
Described surface activity liquid contains amidosulfonic acid salt 10-100g/l, silicofluoride 10-100g/l.
Described surface activating process is applied to the pretreatment activating operation in fields such as magnesium alloy chemical plating, plating; Surface activating process mechanical mill and chemical roughen must carry out simultaneously.
Characteristics of the present invention are: this magnesium alloy surface activation technology, it can improve magnesium alloy and electroplate or during application in the bonding force of magnesium alloy substrate and coating or coat of painting, can not produce excessive erosion to workpiece.It adopts surface mechanical alligatoring earlier, uses the mechanical mill principle, removes the impurity of Mg alloy surface, comprises greasy dirt, and oxide film etc. and correct grinding Mg alloy surface make the surface reach to little alligatoring effect, reach to uniform little coarse surface; Remove the greasy dirt of workpiece surface, use activation solution activated magnesium alloy surface at last with electrolytic degreasing again, the rate of wear of control surface reaches to uniform little treat surface effectively, and is good to guarantee bonding forces such as magnesium alloy substrate and coating.Its operating gear comprises, the anchor clamps of fixation workpiece, and by float stone, silicon oxide, the wet grinding liquid that magnesium oxide is formed.Through the workpiece after grinding, through cleaning, the lapping liquid of remained on surface is thoroughly removed earlier, electrolytic degreasing is made last activation treatment with chemical process at last again.After handling through these operations, it can improve magnesium alloy greatly through electroplating and during the application treatment process and the bonding force of electrolytic coating or paint film, having overcome the excessive erosion phenomenon that the general chemistry activating process brings simultaneously.
Embodiment
Production technique of the present invention is: the present invention is applied to different magnesium alloy pressure-casting products, comprises AZ91D and AM60B alloy material.Select for use the AZ91D magnesium alloy die casting to activate by following technology:
Float stone 40-60% Na
3PO
420-250g/l amidosulfonic acid sodium 10-100g/l
SiO
220-30% Na
2SiO
315-150g/l Sodium Silicofluoride 10-100g/l
MgO 20-30% tensio-active agent 0.5-7.5%
H
2O: solid=1: 1-5
20-90min 1-3min 1-3min 1-3min 1-3min 1-3min
10-35 ℃ of normal temperature 40-50 ℃ of normal temperature normal temperature normal temperature
500rad/min 4-8V
PH 6-9 PH 7-10
Workpiece after the activation is electroplated after 3 washings immediately.
A mechanical mill:
| 1. rolling speed | 20-500 rev/min |
| 2. lapping liquid | Float stone, silicon oxide, magnesium oxide, water |
| 3. size of particles | The 10-200 micron |
| 4. milling time | 20-90 minute |
| 5. temperature | 10-35℃ |
| 6.pH value | 6-9 |
B. electrolytic degreasing
| ● electrolytic solution | Phosphoric acid salt, silicate, tensio-active agent |
| ● voltage | The 4-8 volt |
| ● the time | 1-3 minute |
| ● temperature | 4O-50℃ |
| ● the pH value | 7-10 |
C. chemical activation
Chemical activation technology mainly is the cleaning Mg alloy surface, prevents to generate once more oxide film, guarantees that Mg alloy surface keeps active condition.With guarantee matrix with after the coating that adds and film the tool good bonding force.
| 1. surface active | |
| ● activation solution | Amidosulfonic acid salt, silicofluoride salt |
| ● the time | 1-3 minute |
| ● temperature | Room temperature |
Activated Mg alloy surface can directly be electroplated or through the processing of filming of water-soluble domestic animal electrophoresis, and must baking operation, avoids active surface to be passivated.
It is as follows that the present invention does detection:
| Performance | Sticking power | Neutral salt spray test | Outward appearance | High temperature and humidity test |
| Testing standard | ISO2409 | GB/T 10125-97 | Range estimation | 50℃×95％50h |
| Without activation treatment | 3B-4B | 120 have slight corrosion | Slight die casting defective is arranged | The slight foaming |
| Activated processing | More than the 4B | 120h does not have corrosion | Substantially there is not the die casting defective | No considerable change |
From detected result, after activation treatment of the present invention, can increase the over-all properties of magnesium alloy significantly.
Concrete operations are as follows: with anchor clamps workpiece is clipped in the cylinder machine, with float stone 50%, SiO
225%, MgO 26%, H
2O is mixed with lapping liquid, and water and solid volume ratio are 1: 3, and the time is used 60min, and temperature is 25 ℃, drum speed 500rad/min, and PH is 8, washes with 2min under the normal temperature, carries out electrolytic degreasing after the washing, electrolytic solution contains Na
3PO
4135g/l, Na
2SiO
380g/l, tensio-active agent 5.5%, voltage is chosen in 6 volts, time is used 2min, and temperature is 45 ℃, pH value 8, wash with 2min under the normal temperature, wash 2min after the electrolysis at normal temperatures with water twice every time, carry out chemical activation subsequently, activation solution amidosulfonic acid sodium 55g/l, Sodium Silicofluoride 55g/l, wash with 2min under the normal temperature, temperature is chosen in the damp-warm syndrome degree.Wash 3 times each 2min under the workpiece normal temperature after the activation with water, electroplate immediately after the washing.
Through contrast, the sticking power of range estimation testing standard is SO2409, and neutral salt spray test is GB/T10125-97, presents 50 ℃ * 95% 50h in high temperature and humidity test; Outward appearance without activation treatment has slight die casting defective, and its sticking power is chosen in 3B-4B, and neutral salt spray test 120 has slight corrosion, slightly bubbles in high temperature and humidity test.
Activated processing outward appearance does not have the die casting defective substantially, and its sticking power is chosen in more than the 4B, and neutral salt spray test 120h does not have corrosion, does not have considerable change in high temperature and humidity test.
This shows that activated Mg alloy surface can directly be electroplated or through the processing of filming of water-soluble domestic animal electrophoresis, and does not need baking operation, avoids active surface to be passivated.
Claims (7)
1, magnesium alloy surface activation technology, it is characterized in that: it adopts wet type rolling machine grinding Mg alloy surface to carry out mechanical alligatoring earlier, reach to uniform little coarse surface, lapping liquid, contain float stone 40-60%, magnesium oxide 20-30%, silicon oxide 20-30%, water: the volume ratio of solid=1: 1-5, lapping liquid pH value is chosen in 6-9; Remove greasy dirt, the usefulness chemical activation liquid activated magnesium alloy surface of workpiece surface again with electrolytic degreasing, the rate of wear of control surface reaches to uniform little treat surface effectively, and is good to guarantee bonding forces such as magnesium alloy substrate and coating.
2, Mg alloy surface according to claim 1 is handled activating process, it is characterized in that: it is that processed is placed in the sealed rolling shredder cylinder that described wet type rolling machine grinds, rollers roll speed is chosen in 20-500 rev/min, cylinder is immersed in the lapping liquid fully, and milling time is chosen in 20-90 minute; Temperature is chosen in 10-35 ℃.
3, Mg alloy surface according to claim 1 is handled activating process, it is characterized in that: described electrolytic degreasing, voltage are chosen in the 4-8 volt, and electrolysis time is chosen in 1-3 minute, and temperature is controlled at 40-50 ℃, and the pH value is controlled at 7-10.
4, Mg alloy surface according to claim 1 is handled activating process, and it is characterized in that: the electrolytic solution of described electrolytic degreasing comprises phosphoric acid salt 20-250g/l; Silicate 15-150g/l; Tensio-active agent 0.5-7.5%.
5, Mg alloy surface according to claim 1 is handled activating process, it is characterized in that: described surface active, workpiece to be soaked in surface activity liquid 1-3 minute, and temperature is a normal temperature, pH=1.0-5.0
6, Mg alloy surface according to claim 5 is handled activating process, and it is characterized in that: described surface activity liquid contains amidosulfonic acid salt 10-100g/l, silicofluoride 10-100g/l.
7, Mg alloy surface according to claim 1 is handled activating process, and it is characterized in that: described surface activating process is applied to the pretreatment activating operation in fields such as magnesium alloy chemical plating, plating; Surface activating process mechanical mill and chemical roughen must carry out simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026163 CN1281796C (en) | 2004-05-21 | 2004-05-21 | Magnesium alloy surface activating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026163 CN1281796C (en) | 2004-05-21 | 2004-05-21 | Magnesium alloy surface activating process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1584127A CN1584127A (en) | 2005-02-23 |
| CN1281796C true CN1281796C (en) | 2006-10-25 |
Family
ID=34601223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410026163 Expired - Lifetime CN1281796C (en) | 2004-05-21 | 2004-05-21 | Magnesium alloy surface activating process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1281796C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381608C (en) * | 2005-11-08 | 2008-04-16 | 大连理工大学 | Treatment method of magnosium alloy surface |
| CN101012571B (en) * | 2006-12-31 | 2010-05-19 | 湖南纳菲尔新材料科技股份有限公司 | Anode poling processing technique before electric plating |
| CN102776540B (en) * | 2012-07-11 | 2016-03-23 | 东莞市闻誉实业有限公司 | A kind of magnesium alloy surface treatment process |
| CN103981551B (en) * | 2014-04-29 | 2016-09-14 | 扬州虹扬科技发展有限公司 | A kind of processing method before pyrite product electronickelling |
| CN106198288A (en) * | 2016-08-23 | 2016-12-07 | 广东电网有限责任公司电力科学研究院 | The method of inspection of a kind of coated layer adhesion and verifying attachment |
| CN115820129A (en) * | 2022-12-28 | 2023-03-21 | 东莞市四辉表面处理科技有限公司 | Environment-friendly polishing solution for rolling grinding |
-
2004
- 2004-05-21 CN CN 200410026163 patent/CN1281796C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1584127A (en) | 2005-02-23 |
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| C14 | Grant of patent or utility model | ||
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| ASS | Succession or assignment of patent right |
Owner name: JIARUI INTERNATIONAL HOLDING CO., LTD. Free format text: FORMER OWNER: LI YUANFA Effective date: 20070525 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070525 Address after: Cayman Islands, Grand Cayman, George Town Patentee after: JIARUI INTERNATIONAL Co.,Ltd. Address before: Room 6, building A, No. 6 Fu Bao garden first China Hongkong New Territories Ma'anshan Kam Ying Road Patentee before: Li Yuanfa |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20050223 Assignee: KA SHUI TECHNOLOGY (HUIZHOU) Co.,Ltd. Assignor: JIARUI INTERNATIONAL Co.,Ltd. Contract record no.: 2012990000905 Denomination of invention: Magnesium alloy surface activating process Granted publication date: 20061025 License type: Exclusive License Record date: 20121220 |
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Granted publication date: 20061025 |