CN103668228A - Surface treatment technology of aluminum alloy sectional material - Google Patents
Surface treatment technology of aluminum alloy sectional material Download PDFInfo
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- CN103668228A CN103668228A CN201310585382.4A CN201310585382A CN103668228A CN 103668228 A CN103668228 A CN 103668228A CN 201310585382 A CN201310585382 A CN 201310585382A CN 103668228 A CN103668228 A CN 103668228A
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- solution
- sodium
- aluminium alloy
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 28
- 238000004381 surface treatment Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 title abstract description 7
- 238000005516 engineering process Methods 0.000 title abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 39
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims abstract description 26
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 20
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims abstract description 20
- 238000005498 polishing Methods 0.000 claims abstract description 18
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 14
- 235000010344 sodium nitrate Nutrition 0.000 claims abstract description 13
- 239000004317 sodium nitrate Substances 0.000 claims abstract description 13
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 13
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000005554 pickling Methods 0.000 claims abstract description 4
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 19
- 229940001516 sodium nitrate Drugs 0.000 claims description 12
- 238000004090 dissolution Methods 0.000 claims description 11
- 239000012153 distilled water Substances 0.000 claims description 9
- 235000019353 potassium silicate Nutrition 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 4
- RFRIWRLHYDZFRS-UHFFFAOYSA-N [Na].[Na].[Na].P(O)(O)(O)=O Chemical compound [Na].[Na].[Na].P(O)(O)(O)=O RFRIWRLHYDZFRS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 239000002253 acid Substances 0.000 abstract description 5
- 239000001488 sodium phosphate Substances 0.000 abstract 2
- 229910000406 trisodium phosphate Inorganic materials 0.000 abstract 2
- 235000019801 trisodium phosphate Nutrition 0.000 abstract 2
- 239000004115 Sodium Silicate Substances 0.000 abstract 1
- 229910052911 sodium silicate Inorganic materials 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 21
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- ing And Chemical Polishing (AREA)
Abstract
The invention provides a surface treatment technology of an aluminum alloy sectional material, which comprises the following steps: (1) preparing an unoiling solution composed of trisodium phosphate, sodium carbonate and sodium silicate; (2) preparing a nitric acid solution prepared from nitric acid and water; (3) preparing a polishing solution composed of sodium hydroxide, sodium nitrite, sodium nitrate and trisodium phosphate; (4) placing the aluminum alloy sectional material into the unoiling solution for treatment for 45-60 seconds at the temperature of 20-30 DEG C, taking out and placing the aluminum alloy sectional material into the nitric acid solution for acid pickling for 5-10 seconds at the temperature of 20-30 DEG C, and finally placing the aluminum alloy sectional material into the polishing solution for treatment for 30-60 seconds at the temperature of 90-100 DEG C and washing with water. The aluminum alloy sectional material, treated through the surface treatment technology disclosed by the invention, can meet the engineering requirements in all respects.
Description
Technical field
The present invention relates to a kind of process of surface treatment of aluminium alloy extrusions.
Background technology
For solving and improve the protective, ornamental and functional of aluminium alloy, as improve light, be convenient to some physics and chemistry characteristic that painted or betterment works aspect needs, as high rigidity, wear-resistant, electrical isolation, hydrophilic etc., also have new specific function (photo electric, electro permanent magnetic), need to process the surface of aluminium alloy.Existing surface-treated method has: surperficial mechanical treatment, chemical conversion treatment, surface electrochemistry are processed, spraying organism coating.And existing surface treatment effect is undesirable, can not reach engine request.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of process of surface treatment of aluminium alloy extrusions, and the aluminium alloy extrusions each side after processing all can reach engine request.
For solving above-mentioned existing technical problem, the present invention adopts following scheme: the process of surface treatment of aluminium alloy extrusions, comprise the following steps: 1), prepare by tertiary sodium phosphate, sodium carbonate, water glass, formed except oil solution, wherein the content of tertiary sodium phosphate is that the content of 65～70g/L, sodium carbonate is that the content of 30～40g/L, water glass is 10～15g/L; 2), prepare the salpeter solution of being made by nitric acid and water, the mass ratio of nitric acid and water is 100～150:850～900; 3), prepare the polishing solution being formed by sodium hydroxide, Sodium Nitrite, SODIUMNITRATE, tertiary sodium phosphate, the content of sodium hydroxide is 180～200g/L, the content of Sodium Nitrite is 145～180g/L, the content of SODIUMNITRATE is 155～200g/L, the content of tertiary sodium phosphate is 100～150g/L, when prepared by polishing solution, first with distilled water first by dissolution of sodium hydroxide, with the distilled water of 60 ℃, dissolve Sodium Nitrite, SODIUMNITRATE successively again, distilled water dissolving phosphoric acid trisodium with 100 ℃, finally mix, adding distil water is to the volume of required preparation; 4) aluminium alloy extrusions is placed in to 20-30 ℃ and takes out after processing 45～60s except oil solution, then be placed in the salpeter solution pickling 5-10s of 20-30 ℃, be finally placed in temperature and process 30～60s after washing at the polishing solution of 90～100 ℃.
As preferably, described aluminium alloy extrusions comprises following component by mass percentage: Mg:1.5%～1.9%, Si:1.2%～1.4%, Mn:0.03%～0.06%, Cu:0.20%～0.50%, Fe:0.05%～0.25%, Ti:0.03%～0.08%, Cr:0.03%～0.06%, Zr:0.03%～0.06%, P:0.12%～0.20%, Sn:0.20%～0.30%, all the other are Al.
As preferably, the content that is 40g/L, water glass except the content of tertiary sodium phosphate in the oil solution content that is 65g/L, sodium carbonate is 15g/L.
As preferably, in salpeter solution, the mass ratio of nitric acid and water is 120:880.
As preferably, in polishing solution, the content of sodium hydroxide is that the content of 180g/L, Sodium Nitrite is that the content of 145g/L, SODIUMNITRATE is that the content of 200g/L, tertiary sodium phosphate is 150g/L.
Beneficial effect:
The present invention adopts the process of surface treatment of the aluminium alloy extrusions that technique scheme provides, and the aluminium alloy extrusions each side after processing all can reach engine request.
Embodiment
The process of surface treatment of aluminium alloy extrusions, comprise the following steps: 1), prepare by tertiary sodium phosphate, sodium carbonate, water glass, formed except oil solution, wherein the content of tertiary sodium phosphate is that the content of 65～70g/L, sodium carbonate is that the content of 30～40g/L, water glass is 10～15g/L; 2), prepare the salpeter solution of being made by nitric acid and water, the mass ratio of nitric acid and water is 100～150:850～900; 3), prepare the polishing solution being formed by sodium hydroxide, Sodium Nitrite, SODIUMNITRATE, tertiary sodium phosphate, the content of sodium hydroxide is 180～200g/L, the content of Sodium Nitrite is 145～180g/L, the content of SODIUMNITRATE is 155～200g/L, the content of tertiary sodium phosphate is 100～150g/L, when prepared by polishing solution, first with distilled water first by dissolution of sodium hydroxide, with the distilled water of 60 ℃, dissolve Sodium Nitrite, SODIUMNITRATE successively again, distilled water dissolving phosphoric acid trisodium with 100 ℃, finally mix, adding distil water is to the volume of required preparation; 4) aluminium alloy extrusions is placed in to 20-30 ℃ and takes out after processing 45～60s except oil solution, then be placed in the salpeter solution pickling 5-10s of 20-30 ℃, be finally placed in temperature and process 30～60s after washing at the polishing solution of 90～100 ℃.This technique is particularly suitable for processing the aluminium alloy extrusions with following component: by mass percentage, Mg:1.5%～1.9%, Si:1.2%～1.4%, Mn:0.03%～0.06%, Cu:0.20%～0.50%, Fe:0.05%～0.25%, Ti:0.03%～0.08%, Cr:0.03%～0.06%, Zr:0.03%～0.06%, P:0.12%～0.20%, Sn:0.20%～0.30%, all the other are Al.The content that is preferably 65g/L, sodium carbonate except the content of tertiary sodium phosphate in oil solution is that the content of 40g/L, water glass is 15g/L.Preferably in salpeter solution, the mass ratio of nitric acid and water is 120:880.Preferably in polishing solution, the content of sodium hydroxide is that the content of 180g/L, Sodium Nitrite is that the content of 145g/L, SODIUMNITRATE is that the content of 200g/L, tertiary sodium phosphate is 150g/L.
Reaction principle: the reaction process of chemical rightenning, be metal in electrolyte solution from dissolution process, because the dissolution rate of metallic surface microscopic protrusions part is faster than the dissolution rate of recessed part, on the one hand, the activity of the specific activity recessed part atoms metal of the atoms metal of microscopic protrusions part is large, thereby make the dissolution rate of bossing faster than the dissolution rate of recessed part, add on the one hand, due in reaction process, there is colloidal cpd to produce, it is deposited on recessed part, dissolving to recessed part metal plays restraining effect, so the dissolution rate of microscopic protrusions part is faster than the dissolution rate of recessed part, again on the one hand, because microscopic protrusions part fully contacts with electrolyte solution, its reactant can be diffused into rapidly in solution, so microscopic protrusions part is faster than the dissolution rate of recessed part.
Commercially available aluminium material surface usually has many cuts, rough and uneven in surface, and smooth finish is poor, before making nameplate, needs polished finish, improves smooth finish.Three acid polishing liquid (phosphoric acid 70%, sulfuric acid 20%, nitric acid 10%) is commonly used in aluminum component polishing, owing to containing nitric acid composition, in polishing process, there are a large amount of oxynitrides gas evolutions, its filemot smog severe contamination air, harm operator is healthy, thus there are many chemical plant to develop one after another acid fog inhibitor, but effect is unsatisfactory.Aluminium is amphoteric metal, it can with acid-respons, again can with alkali reaction, and the present invention has overcome the shortcoming of three acid polishing liquid generation tobacco, and can effectively eliminate cut (three acid polishing liquid can not be eliminated cut), and make aluminium surface-brightening smooth, aluminium alloy is also had to sand face effect.
Claims (5)
1. the process of surface treatment of aluminium alloy extrusions, it is characterized in that: comprise the following steps: 1), prepare by tertiary sodium phosphate, sodium carbonate, water glass, formed except oil solution, wherein the content of tertiary sodium phosphate is that the content of 65～70g/L, sodium carbonate is that the content of 30～40g/L, water glass is 10～15g/L; 2), prepare the salpeter solution of being made by nitric acid and water, the mass ratio of nitric acid and water is 100～150:850～900; 3), prepare the polishing solution being formed by sodium hydroxide, Sodium Nitrite, SODIUMNITRATE, tertiary sodium phosphate, the content of sodium hydroxide is 180～200g/L, the content of Sodium Nitrite is 145～180g/L, the content of SODIUMNITRATE is 155～200g/L, the content of tertiary sodium phosphate is 100～150g/L, when prepared by polishing solution, first with distilled water first by dissolution of sodium hydroxide, with the distilled water of 60 ℃, dissolve Sodium Nitrite, SODIUMNITRATE successively again, distilled water dissolving phosphoric acid trisodium with 100 ℃, finally mix, adding distil water is to the volume of required preparation; 4) aluminium alloy extrusions is placed in to 20-30 ℃ and takes out after processing 45～60s except oil solution, then be placed in the salpeter solution pickling 5-10s of 20-30 ℃, be finally placed in temperature and process 30～60s after washing at the polishing solution of 90～100 ℃.
2. the process of surface treatment of aluminium alloy extrusions according to claim 1, it is characterized in that: described aluminium alloy extrusions comprises following component by mass percentage: Mg:1.5%～1.9%, Si:1.2%～1.4%, Mn:0.03%～0.06%, Cu:0.20%～0.50%, Fe:0.05%～0.25%, Ti:0.03%～0.08%, Cr:0.03%～0.06%, Zr:0.03%～0.06%, P:0.12%～0.20%, Sn:0.20%～0.30%, all the other are Al.
3. the process of surface treatment of aluminium alloy extrusions according to claim 1 and 2, is characterized in that: the content that is 40g/L, water glass except the content of tertiary sodium phosphate in the oil solution content that is 65g/L, sodium carbonate is 15g/L.
4. the process of surface treatment of aluminium alloy extrusions according to claim 1 and 2, is characterized in that: in salpeter solution, the mass ratio of nitric acid and water is 120:880.
5. the process of surface treatment of aluminium alloy extrusions according to claim 1 and 2, is characterized in that: in polishing solution, the content of sodium hydroxide is that the content of 180g/L, Sodium Nitrite is that the content of 145g/L, SODIUMNITRATE is that the content of 200g/L, tertiary sodium phosphate is 150g/L.
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| CN201310585382.4A CN103668228B (en) | 2013-11-20 | 2013-11-20 | The process of surface treatment of aluminium alloy extrusions |
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| CN103668228A true CN103668228A (en) | 2014-03-26 |
| CN103668228B CN103668228B (en) | 2016-08-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012464A (en) * | 2017-04-27 | 2017-08-04 | 张家港乐嘉新能源科技有限公司 | A kind of pretreatment liquid and pre-treating method for improving corrosion resistance of aluminum alloy |
| EP3128022A4 (en) * | 2014-03-31 | 2017-11-15 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Aluminum alloy material and joined body having exceptional adhesive endurance, and automotive component |
| CN113201738A (en) * | 2021-05-10 | 2021-08-03 | 哈尔滨工业大学 | Electrochemical surface treatment method for selectively laser melting AlSi10Mg formed workpiece |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260521A (en) * | 2008-04-21 | 2008-09-10 | 华南理工大学 | Aluminum alloy surface rare earth chemical conversion treatment method |
| CN102925900A (en) * | 2012-10-19 | 2013-02-13 | 贵州航天林泉电机有限公司 | Alkaline chemical polishing solution and alkaline chemical polishing method |
-
2013
- 2013-11-20 CN CN201310585382.4A patent/CN103668228B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260521A (en) * | 2008-04-21 | 2008-09-10 | 华南理工大学 | Aluminum alloy surface rare earth chemical conversion treatment method |
| CN102925900A (en) * | 2012-10-19 | 2013-02-13 | 贵州航天林泉电机有限公司 | Alkaline chemical polishing solution and alkaline chemical polishing method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3128022A4 (en) * | 2014-03-31 | 2017-11-15 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Aluminum alloy material and joined body having exceptional adhesive endurance, and automotive component |
| CN109402463A (en) * | 2014-03-31 | 2019-03-01 | 株式会社神户制钢所 | Aluminium alloy material and conjugant or automobile component |
| CN107012464A (en) * | 2017-04-27 | 2017-08-04 | 张家港乐嘉新能源科技有限公司 | A kind of pretreatment liquid and pre-treating method for improving corrosion resistance of aluminum alloy |
| CN107012464B (en) * | 2017-04-27 | 2019-06-21 | 张家港市乐嘉新材料股份有限公司 | A kind of pretreatment liquid and pre-treating method improving corrosion resistance of aluminum alloy |
| CN113201738A (en) * | 2021-05-10 | 2021-08-03 | 哈尔滨工业大学 | Electrochemical surface treatment method for selectively laser melting AlSi10Mg formed workpiece |
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| CN103668228B (en) | 2016-08-31 |
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Inventor after: Fang Rencong Inventor before: Ru Linbao |
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Effective date of registration: 20160804 Address after: 201802 Shanghai City, Jiading District Nanxiang Town, Shanghai Yi Road No. 1288 building 11 room 409 Applicant after: SHANGHAI MINJIAN ALUMINUM CO., LTD. Address before: Zhili town Wuxing District Meng Xiang Gang Cun Ru Jia Dai, Zhejiang city of Huzhou Province, No. 16 313008 Applicant before: Ru Linbao |
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Address after: 201404 Building 1, no.359 Jiangzhou Road, Jinhui Town, Fengxian District, Shanghai Patentee after: Shanghai Minjian Aluminum Co.,Ltd. Address before: Room 409, building 11, 1288 Huyi Road, Nanxiang Town, Jiading District, Shanghai, 201802 Patentee before: SHANGHAI MINJIAN ALUMINUM Co.,Ltd. |