CN102477573A - Surface treatment process for anodizing aluminum products - Google Patents
Surface treatment process for anodizing aluminum products Download PDFInfo
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- CN102477573A CN102477573A CN2010105564093A CN201010556409A CN102477573A CN 102477573 A CN102477573 A CN 102477573A CN 2010105564093 A CN2010105564093 A CN 2010105564093A CN 201010556409 A CN201010556409 A CN 201010556409A CN 102477573 A CN102477573 A CN 102477573A
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Abstract
The invention provides surface treatment process for anodizing aluminum products. The surface treatment process includes steps of neutralizing and washing by water; degreasing the aluminum products by acid-base solution at the normal temperature; washing the aluminum products by hot pure water with the temperature ranging from 55 DEG C to 65 DEG C; disposing the aluminum products serving as anodes into electrolytic sulfuric acid solution so that anode and cathode electrolysis is carried out under the conditions of the current ranging from 25A to 35A, the temperature ranging from 55 DEG C to 60 DEG C and the pH (potential of hydrogen) value ranging from 1 to 2; then washing the aluminum products by hot water with the temperature ranging from 55 DEG C to 60 DEG C after washing the same by pure water; and finally drying the aluminum products and collecting the same. Accordingly, a dense film much thicker than a natural oxidation film can be formed on the surface of aluminum and alloy thereof after anodizing treatment, the thickness of the dense film ranges from tens of micrometers to hundreds of micrometers, accordingly, the surface luster of metal can be kept for a long time, both corrosion resistance and mechanical strength of the metal are improved to a certain degree, and decorative appearance of the aluminum products further can be formed by dyeing.
Description
Technical field
The present invention relates to a kind of process of surface treatment, relate in particular to a kind of aluminium product anode oxidation process of surface treatment.
Background technology
No matter adopt the aluminum and the goods of which kind of method processing; The surface all can exist dirt and defective to some extent, like dust, MOX (aluminum oxide film natural or that high temperature forms down), residual greasy dirt, pitch sign, a dead lift impression of the hand (staple is lipid acid and the compound that contains helium), welding flux and corrosion salt, metal burr, slight flower scratch etc.Therefore before oxide treatment; Method with chemistry and physics is carried out necessary cleaning to product surface; Make its exposed purified metallic matrix; Carry out smoothly in order to heat-tinting, thus obtain with matrix bond firmly, color and luster and the thickness artificial rust that all meets the demands and have best superperformance such as anti-corrosion, wear-resisting, weather-proof.
Aluminum products can oxidation in air this be commonly known, the aluminium surface does not have crystal formation naturally during the oxidation of formation, it can make the aluminum metal surface lose original gloss; Though the natural sull of this layer can make slightly passivation of metal; But very thin, greatly about 4～5nm, and voidage is big; Mechanical property is also poor, can not prevent effectively that various media are to the further corrosion of aluminum metal in the atmosphere.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of aluminium product anode oxidation process of surface treatment be provided, through anodize, can make aluminium and alloy surface thereof obtain one deck than the natural oxidation thickness the compact film of Duoing.
The object of the invention is realized through following technical scheme:
The process of surface treatment of aluminium product anode oxidation is characterized in that may further comprise the steps:
1. surface preparation: neutralization, water clean;
2. anodize: through acid-base solution aluminum products are carried out oil removal treatment at normal temperatures; Then in 55～65 ℃ of hot pure water, wash; With aluminum products is that anode places the electrolysis sulphuric acid soln, in 25～35A, 55～60 ℃, the condition and range of pH value 1～2, carries out the negative and positive electrolysis; Wash with pure water, wash with 55～60 ℃ of hot water; Oven dry again, rewinding;
3. pack.
Further, the process of surface treatment of above-mentioned aluminium product anode oxidation, wherein, step anodize 2., oil removing under normal temperature acid-base solution condition; Water with 55 ℃ is washed; Electrolytic anodization under 30A, 58 ℃, the condition of pH value 1.6; Pure water is washed; Wash with 56 ℃ of hot pure water; Oven dry, rewinding.
Substantive distinguishing features and obvious improvement that technical scheme of the present invention is outstanding are mainly reflected in:
Through anodize, can make aluminium and alloy surface thereof obtain one deck than the natural oxidation thickness the compact film (from tens microns even to the hundreds of micron) of Duoing.Make the metallic surface gloss can permanency, etch resistant properties, physical strength all increase, and dyedly also can obtain ornamental outward appearance.Because aluminium and alloy product thereof have many characteristics through after the anodic oxidation, so that alumilite process technology is used in the aluminum products surface treatment is wider.
Embodiment
The process of surface treatment flow process of aluminium product anode oxidation of the present invention is: at first surface preparation, and neutralization, water clean; Anodize is carried out the oil removal treatment to aluminum products through acid-base solution at normal temperatures then; Then 55～65 ℃ of hot pure water are washed; Be that anode places the electrolysis sulphuric acid soln with aluminum products, in 25～35A, 55～60 ℃, the condition and range of pH value 1～2, carrying out the negative and positive electrolysis; Wash with pure water, wash with 55～60 ℃ of hot water; Oven dry again, rewinding; Packing.
Embodiment 1
Surface preparation: neutralization, water clean;
Anodize: through acid-base solution aluminum products are carried out oil removal treatment at normal temperatures; Then in 55 ℃ of hot pure water, wash; With aluminum products is that anode places the electrolysis sulphuric acid soln, in 35A, 58 ℃, the condition and range of pH value 1.7, carries out the negative and positive electrolysis; Wash with pure water, wash with 56 ℃ of hot water; Oven dry again, rewinding;
Packing.
Embodiment 2
Surface preparation: neutralization, water clean;
Anodize: through acid-base solution aluminum products are carried out oil removal treatment at normal temperatures; Then in 65 ℃ of hot pure water, wash; With aluminum products is that anode places the electrolysis sulphuric acid soln, in 30A, 56 ℃, the condition and range of pH value 1.5, carries out the negative and positive electrolysis; Wash with pure water, wash with 60 ℃ of hot water; Oven dry again, rewinding;
Packing.
Embodiment 3
Surface preparation: neutralization, water clean;
Anodize: through acid-base solution aluminum products are carried out oil removal treatment at normal temperatures; Then in 60 ℃ of hot pure water, wash; With aluminum products is that anode places the electrolysis sulphuric acid soln, in 25A, 60 ℃, the condition and range of pH value 2, carries out the negative and positive electrolysis; Wash with pure water, wash with 55 ℃ of hot water; Oven dry again, rewinding;
Packing.
No matter adopt the aluminum and the goods of which kind of method processing; The surface all can exist dirt and defective to some extent; Like dust, MOX aluminum oxide film, residual greasy dirt, pitch sign, a dead lift impression of the hand staple natural or that high temperature forms down is that lipid acid and the compound that contains helium, welding flux and corrosion salt etc. do not dissolve in cold or hot clear water is washed; But can be dissolved in the acidic solution,, use acid soaking and washing again to expose bright base metal surface so the goods of washing through the thermokalite corrosion all must be intended to remove residual soil; Acid just neutralizes with alkali, just can not too much residual basic soln on aluminum products.Then clean through clear water, purpose is thoroughly to remove debris and water-soluble reactant on aluminum products surface, makes the next procedure tank liquor exempt from dirt, guarantees processing efficiency and quality again.Cleaning adopts a cold water to clean mostly, but the and then two-fold cleaning of thing cold water of the common employing hot water of goods after the alkali erosion.After top neutralization and clear water cleaning; In 30A, 58 ℃, the solution of pH value 1.6; With aluminum products is that anode places electrolyte solution, utilizes electrolysis principle, makes its surface form the process of aluminum oxide film; Negative electrode is the high material of chemical in electrolytic solution in its device, like lead, stainless steel, aluminium etc.When electric current passes through, on negative electrode, releasing hydrogen gas; On anode, the oxygen of separating out is not only the oxygen of molecular state, also comprises atomic oxygen (O) and ion-oxygen.Oxygen institute oxidation as anodic aluminium is separated out on it forms anhydrous pellumina, the oxygen of generation be not all with the aluminium effect, a part separate out with the gasiform form.
Anodic oxidation in electrolytic solution, in anodizing initialized blink, its surface receives even oxygen as the anodic aluminum products; Generate as thin as a wafer and very fine and close film, because the effect of sulphuric acid soln, the weakest point of film is (like crystal boundary; The impurity point of density, lattice imperfection or structural distortion place) local dissolution takes place, and a large amount of spaces appear; Both primary sound oxidation center; Matrix metal is separated with the point that gets into the space contacted, form the new film of one deck between electric current and the metal, make the old film of local dissolution as obtaining like " repairing ".Along with the prolongation of oxidization time, the continuous dissolving or the repairing of film, oxidizing reaction is deserved developing in depth, thereby makes the aluminum products surface generate thin and fine and close again internal layer and the thick and outer sull of being formed of porous.Its inner film thickness to oxidation finishes constant basically, and but constantly pass to the depths position; And thicken in time in outer early certain oxidization time.
It is emphasized that: above only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction; Every foundation technical spirit of the present invention all still belongs to the scope of technical scheme of the present invention to any simple modification, equivalent variations and modification that above embodiment did.
Claims (2)
1. the process of surface treatment of aluminium product anode oxidation is characterized in that may further comprise the steps:
1. surface preparation: neutralization, water clean;
2. anodize: through acid-base solution aluminum products are carried out oil removal treatment at normal temperatures; Then in 55～65 ℃ of hot pure water, wash; With aluminum products is that anode places the electrolysis sulphuric acid soln, in 25～35A, 55～60 ℃, the condition and range of pH value 1～2, carries out the negative and positive electrolysis; Wash with pure water, wash with 55～60 ℃ of hot water; Oven dry again, rewinding;
3. pack.
2. the process of surface treatment of aluminium product anode oxidation according to claim 1 is characterized in that: step anodize 2., oil removing under normal temperature acid-base solution condition; Water with 55 ℃ is washed; Electrolytic anodization under 30A, 58 ℃, the condition of pH value 1.6; Pure water is washed; Wash with 56 ℃ of hot pure water; Oven dry, rewinding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105564093A CN102477573A (en) | 2010-11-23 | 2010-11-23 | Surface treatment process for anodizing aluminum products |
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| CN2010105564093A CN102477573A (en) | 2010-11-23 | 2010-11-23 | Surface treatment process for anodizing aluminum products |
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| CN102477573A true CN102477573A (en) | 2012-05-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864478A (en) * | 2012-10-17 | 2013-01-09 | 马炳舵 | Surface treatment process for aluminum ware |
| CN103484913A (en) * | 2013-09-16 | 2014-01-01 | 青岛聚蚨源机电有限公司 | Aluminum alloy hard anodic oxidization treating process |
| CN103966639A (en) * | 2013-01-29 | 2014-08-06 | 佛山市广成铝业有限公司 | Method for preparing anodised aluminium section bar |
| CN107699932A (en) * | 2017-09-30 | 2018-02-16 | 徐州轩辕铝业有限公司 | A kind of surface treatment method of aluminum products |
| CN111394768A (en) * | 2020-04-10 | 2020-07-10 | 高瑞安 | Powder spraying aluminum product and surface treatment method thereof |
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| JPS59162300A (en) * | 1983-03-07 | 1984-09-13 | Fujisash Co | Production of aluminum material or aluminum alloy material having improved adhesiveness |
| CN1072872A (en) * | 1991-12-02 | 1993-06-09 | 颜彩玉 | Method for surface treatment of aluminium cauldron body |
| KR980009527A (en) * | 1996-07-09 | 1998-04-30 | 이인영 | Surface treatment of aluminum or its alloys |
| JP2003328187A (en) * | 2002-05-17 | 2003-11-19 | Nippon Light Metal Co Ltd | Surface treatment method of aluminum material |
| CN1970836A (en) * | 2006-12-01 | 2007-05-30 | 台山市金桥铝型材厂有限公司 | Environment-friendly surface treatment method for aluminium profile before spray coating |
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2010
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59162300A (en) * | 1983-03-07 | 1984-09-13 | Fujisash Co | Production of aluminum material or aluminum alloy material having improved adhesiveness |
| CN1072872A (en) * | 1991-12-02 | 1993-06-09 | 颜彩玉 | Method for surface treatment of aluminium cauldron body |
| KR980009527A (en) * | 1996-07-09 | 1998-04-30 | 이인영 | Surface treatment of aluminum or its alloys |
| JP2003328187A (en) * | 2002-05-17 | 2003-11-19 | Nippon Light Metal Co Ltd | Surface treatment method of aluminum material |
| CN1970836A (en) * | 2006-12-01 | 2007-05-30 | 台山市金桥铝型材厂有限公司 | Environment-friendly surface treatment method for aluminium profile before spray coating |
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| 温建辉: ""铝和铝合金的阳极氧化"", 《晋中师范高等专科学校学报》, vol. 21, no. 4, 31 December 2004 (2004-12-31), pages 334 - 335 * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864478A (en) * | 2012-10-17 | 2013-01-09 | 马炳舵 | Surface treatment process for aluminum ware |
| CN103966639A (en) * | 2013-01-29 | 2014-08-06 | 佛山市广成铝业有限公司 | Method for preparing anodised aluminium section bar |
| CN103484913A (en) * | 2013-09-16 | 2014-01-01 | 青岛聚蚨源机电有限公司 | Aluminum alloy hard anodic oxidization treating process |
| CN103484913B (en) * | 2013-09-16 | 2016-08-17 | 李淑兰 | Hard Anodic Oxidation of Aluminum Alloy processes technique |
| CN107699932A (en) * | 2017-09-30 | 2018-02-16 | 徐州轩辕铝业有限公司 | A kind of surface treatment method of aluminum products |
| CN111394768A (en) * | 2020-04-10 | 2020-07-10 | 高瑞安 | Powder spraying aluminum product and surface treatment method thereof |
| CN111394768B (en) * | 2020-04-10 | 2022-08-26 | 高瑞安 | Powder spraying aluminum product and surface treatment method thereof |
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Application publication date: 20120530 |